|
This thread along with the 39' conversion thread has been really good!??
I knew this was the right place to ask. Thanks, Ric hey Ric,
Try looking for ev onboard chargers.? This one is the big brother to my boat¡¯s shore charger.
Not the full 100A that you requested, but it will hit 80A at charging voltages for a 48V pack (56-60V) when driven by a 230V AC source.? Finding this took about 90 sec. online.? With a little more searching, you can probably find a better fit.
Fair winds,
Eric
|
How much to duplicate your setup? I don't know enough about it to try to build it myself.
Hey Fred,
Here's a post that I made a few years ago about my LiFePO4 battery bank:
My battery pack is 16 Thundersky 160Ah cells in series with Mini-BMS modules from EV Works on each cell. My experience lines up with Jason's. Minimal draw over long storage periods. I have measured cell performance through annual controlled deep discharge and recharge cycles since the pack's installation in 2010. There has been minimal capacity degradation over the last six years, however, the cells are still outperforming their manufacturer's specs. I have adjusted my E-Xpert Pro battery monitor to account for my overall self-discharge rate, I believe that my present setting of 2.6%/month is very close. That rate includes the effects of the BMS cells.
I have stored my batteries starting at states from 100% down to 60%. As I stated earlier, the cells are still outperforming their stated specs. It does not appear that leaving them at 100% for months at a time has had any measurable effect. That said, maybe it has cost me something in cycle life. Since I am still under 100 cycles after six years, I doubt that I will get the chance to observe a small percentage reduction in the stated 2000+ cycle lifespan.
After owning this battery pack for 6 years, I am a solid proponent of the technology. Previously, the average lifespan of a lead acid battery in any intermittent duty has been something less than 3 years for me, in spite of my well intentioned, but apparently inadequate, attention to battery maintenance. This includes classic cars, utility vehicles and my boats.
I have found LiFePO4 cells to be lighter, smaller, take less attention, and safer than the various types of lead acid batteries (wet, AGM, gel). I have blown up a wet cell L/A battery with a trickle charger. This lead to extensive corrosive damage, luckily, the car and my garage did not catch fire. For me, the lithium cells have already proven to be cheaper, based on my personal history, I would be getting ready to buy my third set of lead acid batteries for my boat. That would offset any cost savings that I would have gotten during my initial install.
I purchased my cells and BMS in 2009 for just under $0.45/Wh, including shipping and taxes, which is still an excellent deal today for new, not used or reclaimed, product. So for those of you that are waiting for the prices to drop 20% in the year or so as promised by "experts", I can tell you that they were saying the same thing seven years ago. Maybe Tesla and cordless drill manufacturers are saving money, but those savings have never materialized for small volume, end user customers like us. That said, the prices have been stable while most things have been affected by inflation, so that is a net effect of getting relatively cheaper. Bottom line, other than your ability to afford the initial purchase, it is my belief that every other concern with LiFePO4 batteries that has been listed here recently, is really not an issue in the real world.
This is all based on my first hand experiences. Good luck with your decisions.
Eric
Marina del Rey, CA
1964 Cheoy Lee Bermuda 30, 5KW Propulsion Marine drive, 8KWh LiFePo4 battery pack.
|
Unfortunately, that isn¡¯t really an option. ?I put this all together 10 years ago, and most of what I bought is no longer available. ?Thundersky stopped making prismatic cells, but there are a number of other reputable manufacturers that still do, like CALB. ?ElCon no longer makes the PFC 2000+ charger, although the still available PFC 2500 will produce almost 90% of the charge of the 2000+ when powered by 115V A/C. ?The EVPower mini-BMS modules are no longer made, there were other manufacturer¡¯s versions, but even those may be gone now. ?There are plenty of other BMS solutions, you pick the features and price that meet your needs. ?But the E-xpert Pro HV monitor is still available, I saw a listing on amazon for about $250. ?
You should also consider very heavy gauge cabling for your battery pack (see my photo album referenced in another post). I bought the cabling and hardware to make my own cables from genuinedealz.com, they¡¯ve got great prices on marine quality wire. ?I used 2/0 cable for all of my main current connections. ?The bigger the wire, the lower the resistance (losses) over distance, and therefore, the greater efficiency of your system as a whole.
Fair winds,
Eric
PS, I didn¡¯t know anything about any of this when I started my project, and the help I got early on was limited. ?But I figured out what my questions were, learned what I could here and from other groups; DIY electric car builders, boat builders, battery manufacturers, electrical engineers, etc. and figured out my own answers. ?My credentials? I¡¯ve got none, no college degree, just a smattering of practical experience in a wide variety of interests. ?This is just a hobby for me.
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On Sat, May 23, 2020 at 08:49 PM, fred jelich wrote:
How much to duplicate your setup? I don't know enough about it to try to build it myself.
Hey Fred,
Here's a post that I made a few years ago about my LiFePO4 battery bank:
My battery pack is 16 Thundersky 160Ah cells in series with Mini-BMS modules from EV Works on each cell. My experience lines up with Jason's. Minimal draw over long storage periods. I have measured cell performance through annual controlled deep discharge and recharge cycles since the pack's installation in 2010. There has been minimal capacity degradation over the last six years, however, the cells are still outperforming their manufacturer's specs. I have adjusted my E-Xpert Pro battery monitor to account for my overall self-discharge rate, I believe that my present setting of 2.6%/month is very close. That rate includes the effects of the BMS cells.
I have stored my batteries starting at states from 100% down to 60%. As I stated earlier, the cells are still outperforming their stated specs. It does not appear that leaving them at 100% for months at a time has had any measurable effect. That said, maybe it has cost me something in cycle life. Since I am still under 100 cycles after six years, I doubt that I will get the chance to observe a small percentage reduction in the stated 2000+ cycle lifespan.
After owning this battery pack for 6 years, I am a solid proponent of the technology. Previously, the average lifespan of a lead acid battery in any intermittent duty has been something less than 3 years for me, in spite of my well intentioned, but apparently inadequate, attention to battery maintenance. This includes classic cars, utility vehicles and my boats.
I have found LiFePO4 cells to be lighter, smaller, take less attention, and safer than the various types of lead acid batteries (wet, AGM, gel). I have blown up a wet cell L/A battery with a trickle charger. This lead to extensive corrosive damage, luckily, the car and my garage did not catch fire. For me, the lithium cells have already proven to be cheaper, based on my personal history, I would be getting ready to buy my third set of lead acid batteries for my boat. That would offset any cost savings that I would have gotten during my initial install.
I purchased my cells and BMS in 2009 for just under $0.45/Wh, including shipping and taxes, which is still an excellent deal today for new, not used or reclaimed, product. So for those of you that are waiting for the prices to drop 20% in the year or so as promised by "experts", I can tell you that they were saying the same thing seven years ago. Maybe Tesla and cordless drill manufacturers are saving money, but those savings have never materialized for small volume, end user customers like us. That said, the prices have been stable while most things have been affected by inflation, so that is a net effect of getting relatively cheaper. Bottom line, other than your ability to afford the initial purchase, it is my belief that every other concern with LiFePO4 batteries that has been listed here recently, is really not an issue in the real world.
This is all based on my first hand experiences. Good luck with your decisions.
Eric
Marina del Rey, CA
1964 Cheoy Lee Bermuda 30, 5KW Propulsion Marine drive, 8KWh LiFePo4 battery pack.
|
I looked up the Elcon line. They want a 230 volt input. I¡¯m trying to not have to rewire my existing generator to that voltage.?
I love the Victron line and use their charge controllers on our solar. I have a 2k inverter charger on our house system which is completely separate from the motor system so do not need another inverter. I¡¯ve not found a Charger only yet to do what I desire and am still looking. I¡¯m just beginning to get to where we can do some more extensive runs to find amp draw versus speed. With the limited ability we have to put power into the system, longer runs have so far been impractical. Thanks guys Ric
Thank ¡°Powermax¡± 48 volt 20 amp chargers powered from a 6KW 120 volt AC output generator set but I would really like to do is be able to put about 100 amps into the battery/motor circuit.? Cheers, Ric
|
One option you might consider is find a charger that does half the current you want and gang two of them together. ?It may be easer to find two 50 amp chargers then one 100 amp charger. ?Most chargers have no issues being run in parallel.?
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On May 25, 2020, at 10:41 AM, Ric Sanders <rsandersemail@...> wrote:
? I looked up the Elcon line. They want a 230 volt input. I¡¯m trying to not have to rewire my existing generator to that voltage.?
I love the Victron line and use their charge controllers on our solar. I have a 2k inverter charger on our house system which is completely separate from the motor system so do not need another inverter. I¡¯ve not found a Charger only yet to do what I desire and am still looking. I¡¯m just beginning to get to where we can do some more extensive runs to find amp draw versus speed. With the limited ability we have to put power into the system, longer runs have so far been impractical. Thanks guys Ric
Thank ¡°Powermax¡± 48 volt 20 amp chargers powered from a 6KW 120 volt AC output generator set but I would really like to do is be able to put about 100 amps into the battery/motor circuit.? Cheers, Ric
|
FYI. Thundersky was sold to SinoPoly whose cells are readily available. And Winston, former owner of Thundersky now markets cells under his own name.?
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On May 24, 2020, at 3:06 PM, Eric via groups.io <ewdysar@...> wrote:
?Unfortunately, that isn¡¯t really an option. ?I put this all together 10 years ago, and most of what I bought is no longer available. ?Thundersky stopped making prismatic cells, but there are a number of other reputable manufacturers that still do, like CALB. ?ElCon no longer makes the PFC 2000+ charger, although the still available PFC 2500 will produce almost 90% of the charge of the 2000+ when powered by 115V A/C. ?The EVPower mini-BMS modules are no longer made, there were other manufacturer¡¯s versions, but even those may be gone now. ?There are plenty of other BMS solutions, you pick the features and price that meet your needs. ?But the E-xpert Pro HV monitor is still available, I saw a listing on amazon for about $250. ? You should also consider very heavy gauge cabling for your battery pack (see my photo album referenced in another post). I bought the cabling and hardware to make my own cables from genuinedealz.com, they¡¯ve got great prices on marine quality wire. ?I used 2/0 cable for all of my main current connections. ?The bigger the wire, the lower the resistance (losses) over distance, and therefore, the greater efficiency of your system as a whole. Fair winds, Eric PS, I didn¡¯t know anything about any of this when I started my project, and the help I got early on was limited. ?But I figured out what my questions were, learned what I could here and from other groups; DIY electric car builders, boat builders, battery manufacturers, electrical engineers, etc. and figured out my own answers. ?My credentials? I¡¯ve got none, no college degree, just a smattering of practical experience in a wide variety of interests. ?This is just a hobby for me. On Sat, May 23, 2020 at 08:49 PM, fred jelich wrote:
How much to duplicate your setup? I don't know enough about it to try to build it myself.
Hey Fred,
Here's a post that I made a few years ago about my LiFePO4 battery bank:
My battery pack is 16 Thundersky 160Ah cells in series with Mini-BMS modules from EV Works on each cell. My experience lines up with Jason's. Minimal draw over long storage periods. I have measured cell performance through annual controlled deep discharge and recharge cycles since the pack's installation in 2010. There has been minimal capacity degradation over the last six years, however, the cells are still outperforming their manufacturer's specs. I have adjusted my E-Xpert Pro battery monitor to account for my overall self-discharge rate, I believe that my present setting of 2.6%/month is very close. That rate includes the effects of the BMS cells.
I have stored my batteries starting at states from 100% down to 60%. As I stated earlier, the cells are still outperforming their stated specs. It does not appear that leaving them at 100% for months at a time has had any measurable effect. That said, maybe it has cost me something in cycle life. Since I am still under 100 cycles after six years, I doubt that I will get the chance to observe a small percentage reduction in the stated 2000+ cycle lifespan.
After owning this battery pack for 6 years, I am a solid proponent of the technology. Previously, the average lifespan of a lead acid battery in any intermittent duty has been something less than 3 years for me, in spite of my well intentioned, but apparently inadequate, attention to battery maintenance. This includes classic cars, utility vehicles and my boats.
I have found LiFePO4 cells to be lighter, smaller, take less attention, and safer than the various types of lead acid batteries (wet, AGM, gel). I have blown up a wet cell L/A battery with a trickle charger. This lead to extensive corrosive damage, luckily, the car and my garage did not catch fire. For me, the lithium cells have already proven to be cheaper, based on my personal history, I would be getting ready to buy my third set of lead acid batteries for my boat. That would offset any cost savings that I would have gotten during my initial install.
I purchased my cells and BMS in 2009 for just under $0.45/Wh, including shipping and taxes, which is still an excellent deal today for new, not used or reclaimed, product. So for those of you that are waiting for the prices to drop 20% in the year or so as promised by "experts", I can tell you that they were saying the same thing seven years ago. Maybe Tesla and cordless drill manufacturers are saving money, but those savings have never materialized for small volume, end user customers like us. That said, the prices have been stable while most things have been affected by inflation, so that is a net effect of getting relatively cheaper. Bottom line, other than your ability to afford the initial purchase, it is my belief that every other concern with LiFePO4 batteries that has been listed here recently, is really not an issue in the real world.
This is all based on my first hand experiences. Good luck with your decisions.
Eric
Marina del Rey, CA
1964 Cheoy Lee Bermuda 30, 5KW Propulsion Marine drive, 8KWh LiFePo4 battery pack.
|
On Mon, May 25, 2020 at 07:41 AM, Ric Sanders wrote:
I looked up the Elcon line. They want a 230 volt input. I¡¯m trying to not have to rewire my existing generator to that voltage.?
Hi Ric, To make sure that I¡¯ve got this right, you¡¯re looking for a charger that runs on 115VAC and outputs close to 100A of charging current for a 48V (nominal) DC battery bank. ?Let¡¯s do the math... Charging voltages for a 48V battery run past 56V (above 58V for LiFePO4], but I¡¯ll use 56V for now. ?The charger manufacturers often use 66V as max output voltage for a ¡°48V¡± charger. ?100A x 56V is 5600W. ?If we assume a 95% efficiency for the charger (most are not that efficient), then the charger needs an input of 6000W or more. ?Assuming solid 115VAC input, you¡¯ll need a circuit that supports a 52A load. ?Since 115VAC circuits greater than 30A are pretty rare, I doubt that you¡¯re going to find an off the shelf charger that meets your needs. ?Most electrical engineers that need more than 3400W ( 30A@115VAC),?go to 230VAC. So given all that, you are probably stuck with two 50A 48v chargers, if you can find them, on independent 30A 115VAC circuits, if your generator will support them. ? Alternatively, all of the electric boats that I¡¯m aware of that use high output generators to support their electric drives go with DC generators, rather than AC, e.g. the Lagoon/Solomon catamarans. ?This eliminates the added components, wiring, and losses related to converting from DC to AC and back to DC and gives a more efficient serial hybrid mode like you have described. Boats like mine are using their onboard chargers as emergency backups, using what is already there, to avoid installing specialized equipment to support a dedicated hybrid drive system. ?And as I¡¯ve stated before, I haven¡¯t needed the serial hybrid capabilities in the 10 years since converting to electric. Fair winds, Eric
|
Hi James, I¡¯ve got the 2 powermax units now doing exactly that.?
And Eric, you are spot on. I had not really done the math to carry out the options. I think I need to work on other areas to gain some efficiency with what I have. If we trying to extend range or power up to make a bridge opening on the ICW, I need to just slow back down. We did just finish a cruise down the Florida keys and back, and all in all everything worked fine.? Thanks guys. Cheers, Ric
|
Hi Larry,?
I have been following this thread and would be interested a 48 v battery system. My email is sgjertson@...?
I have an extra 500 ? ?3.2 v 90 ah?cylinders with??bms devices and chargers. We are using big prismatic cells ?for our next??high voltage battery project ? I could duplicate my 48 v lifepo4?set up and charge only material cost if you are interested ?I will get you some pictures. We are in San Diego? Best regards, Larry Schmitz
On Friday, May 22, 2020, 5:21 AM, Larry Brown <elcapitanbrown@...> wrote: Mine is Thunderstruck too.? For your size boat you can go with air cooled but need to make sure to get and engine compartment fan to circulate air.? No more water intake to get clogged with sea grass or some idiot¡¯s shopping bag floating by as you motor.? One of the beauties of the system.? It should push you just fine.? I use a couple eu2000 generators as backup for long distance trips but for day trips where you need a couple hours at most you can get by on batteries.
Anyway, good luck. ?
Larry On May 21, 2020, at 11:01 PM, Ryan Sweet <ryan@...> wrote:
?
Do you have a link for the batteries you had success with? There are so many on offer and it seems quite hard to find much info about each company except for the us based ones and those are all twice as expensive (I recognize that this is possibly for good reasons).? ?
I have had good luck with my 10kw?thunderstruck kit too. First installed 4??agm?batteries ? 12v 220 ah.?Then after 2 years replaced with lifepo4. An excellent upgrade?I assembled 4 battery boxes with 3.2v 90ah cylinders. Each box 4P4S?Then installed an?ant bms for balancing. The monitor is very good??for checking your system. If you decide to assemble your own battery system invest in a Flir Heat sensor. The Flir connects to your I?phone. You aim it at your wiring assembly under load. It detects hot spot?areas of concern in your connections. Battery, contactor ,controller and motor connections. 48 v 360 ah gives plenty of run time at 40 to 90 amp load.? Best regards, Larry Schmitz
On Thursday, May 21, 2020, 4:16 PM, Reuben Trane via <rjtrane=[email protected]> wrote: Go to and look at their kits. I purchased 2 ea for my 12m Power cat. For your needs a 5kW to 10kW motor should do the job. Hard part is figuring out the reduction. I chose 3:1 to get a max prop RPM of 800.
48Vdc woks best. If it¡¯s in your budget assemble a battery from LiFePo4 cells
Feel free to ask me about my installation.
Reuben
|
Hello Steve,? sorry for the delay.? ?I can sell you some of my extra cells.? 3.2 v 90 ah? I am happy with my 10 kw? 48v thunderstruck project? We are experimenting with cylinders and prisms for my work projects.? I can assemble and charge (cost only for a bms and bus bars.)? We are adding a phase change material to our boxes to minimize possible heat and waterproof my battery packs. It is a simple blend of paraffin wax and synthetic bees wax. All my projects are experimental at this point. Observed performance is our goal. We do not sell anything commercially.? cost only if you are interested.? 24v? 36v or 48v? ?available we can parallel? 90? ? ?180? ?270 or 360 ah? ? ? I use new West Marine heavy guage plastic battery boxes.??
I will send some pictures tomorrow.? I hope this helps.? ?Terminalift LLC 9444 Mission Park Place Santee, CA 92071 Ph: (619) 562-0355 F: (619) 562-2060
On Sunday, May 31, 2020, 07:53:28 AM PDT, Steve Gjertson <sgjertson@...> wrote:
Hi Larry,?
I have been following this thread and would be interested a 48 v battery system. My email is sgjertson@...?
I have an extra 500 ? ?3.2 v 90 ah?cylinders with??bms devices and chargers. We are using big prismatic cells ?for our next??high voltage battery project ? I could duplicate my 48 v lifepo4?set up and charge only material cost if you are interested ?I will get you some pictures. We are in San Diego? Best regards, Larry Schmitz
On Friday, May 22, 2020, 5:21 AM, Larry Brown <elcapitanbrown@...> wrote: Mine is Thunderstruck too.? For your size boat you can go with air cooled but need to make sure to get and engine compartment fan to circulate air.? No more water intake to get clogged with sea grass or some idiot¡¯s shopping bag floating by as you motor.? One of the beauties of the system.? It should push you just fine.? I use a couple eu2000 generators as backup for long distance trips but for day trips where you need a couple hours at most you can get by on batteries.
Anyway, good luck. ?
Larry On May 21, 2020, at 11:01 PM, Ryan Sweet <ryan@...> wrote:
?
Do you have a link for the batteries you had success with? There are so many on offer and it seems quite hard to find much info about each company except for the us based ones and those are all twice as expensive (I recognize that this is possibly for good reasons).? ?
I have had good luck with my 10kw?thunderstruck kit too. First installed 4??agm?batteries ? 12v 220 ah.?Then after 2 years replaced with lifepo4. An excellent upgrade?I assembled 4 battery boxes with 3.2v 90ah cylinders. Each box 4P4S?Then installed an?ant bms for balancing. The monitor is very good??for checking your system. If you decide to assemble your own battery system invest in a Flir Heat sensor. The Flir connects to your I?phone. You aim it at your wiring assembly under load. It detects hot spot?areas of concern in your connections. Battery, contactor ,controller and motor connections. 48 v 360 ah gives plenty of run time at 40 to 90 amp load.? Best regards, Larry Schmitz
On Thursday, May 21, 2020, 4:16 PM, Reuben Trane via <rjtrane=[email protected]> wrote: Go to and look at their kits. I purchased 2 ea for my 12m Power cat. For your needs a 5kW to 10kW motor should do the job. Hard part is figuring out the reduction. I chose 3:1 to get a max prop RPM of 800.
48Vdc woks best. If it¡¯s in your budget assemble a battery from LiFePo4 cells
Feel free to ask me about my installation.
Reuben
|
I'd be interested in 48v? 90ah for my boat!
Hello Steve,? sorry for the delay.? ?I can sell you some of my extra cells.? 3.2 v 90 ah? I am happy with my 10 kw? 48v thunderstruck project? We are experimenting with cylinders and prisms for my work projects.? I can assemble and charge (cost only for a bms and bus bars.)? We are adding a phase change material to our boxes to minimize possible heat and waterproof my battery packs. It is a simple blend of paraffin wax and synthetic bees wax. All my projects are experimental at this point. Observed performance is our goal. We do not sell anything commercially.? cost only if you are interested.? 24v? 36v or 48v? ?available we can parallel? 90? ? ?180? ?270 or 360 ah? ? ? I use new West Marine heavy guage plastic battery boxes.??
I will send some pictures tomorrow.? I hope this helps.? ?Terminalift LLC 9444 Mission Park Place Santee, CA 92071 Ph: (619) 562-0355 F: (619) 562-2060
On Sunday, May 31, 2020, 07:53:28 AM PDT, Steve Gjertson < sgjertson@...> wrote:
Hi Larry,?
I have been following this thread and would be interested a 48 v battery system. My email is sgjertson@...?
I have an extra 500 ? ?3.2 v 90 ah?cylinders with??bms devices and chargers. We are using big prismatic cells ?for our next??high voltage battery project ? I could duplicate my 48 v lifepo4?set up and charge only material cost if you are interested ?I will get you some pictures. We are in San Diego? Best regards, Larry Schmitz
On Friday, May 22, 2020, 5:21 AM, Larry Brown <elcapitanbrown@...> wrote: Mine is Thunderstruck too.? For your size boat you can go with air cooled but need to make sure to get and engine compartment fan to circulate air.? No more water intake to get clogged with sea grass or some idiot¡¯s shopping bag floating by as you motor.? One of the beauties of the system.? It should push you just fine.? I use a couple eu2000 generators as backup for long distance trips but for day trips where you need a couple hours at most you can get by on batteries.
Anyway, good luck. ?
Larry On May 21, 2020, at 11:01 PM, Ryan Sweet <ryan@...> wrote:
?
Do you have a link for the batteries you had success with? There are so many on offer and it seems quite hard to find much info about each company except for the us based ones and those are all twice as expensive (I recognize that this is possibly for good reasons).? ?
I have had good luck with my 10kw?thunderstruck kit too. First installed 4??agm?batteries ? 12v 220 ah.?Then after 2 years replaced with lifepo4. An excellent upgrade?I assembled 4 battery boxes with 3.2v 90ah cylinders. Each box 4P4S?Then installed an?ant bms for balancing. The monitor is very good??for checking your system. If you decide to assemble your own battery system invest in a Flir Heat sensor. The Flir connects to your I?phone. You aim it at your wiring assembly under load. It detects hot spot?areas of concern in your connections. Battery, contactor ,controller and motor connections. 48 v 360 ah gives plenty of run time at 40 to 90 amp load.? Best regards, Larry Schmitz
On Thursday, May 21, 2020, 4:16 PM, Reuben Trane via <rjtrane=[email protected]> wrote: Go to and look at their kits. I purchased 2 ea for my 12m Power cat. For your needs a 5kW to 10kW motor should do the job. Hard part is figuring out the reduction. I chose 3:1 to get a max prop RPM of 800.
48Vdc woks best. If it¡¯s in your budget assemble a battery from LiFePo4 cells
Feel free to ask me about my installation.
Reuben
|
Hello Fred,? The 48 v? 90 ah pack is pretty easy to assemble. That will be 16 cylinders.? You can fit them in 1 West Marine heavy duty battery box.? Weight will be about 85 lbs.? ?Just assemble bus bars to place in series. Then add a bms? and charger. I will check costs on these and forward to you. thank you? kind regards Larry Schmitz
?Terminalift LLC 9444 Mission Park Place Santee, CA 92071 Ph: (619) 562-0355 F: (619) 562-2060
On Tuesday, June 2, 2020, 05:27:23 PM PDT, fred jelich <freddyj408@...> wrote:
I'd be interested in 48v? 90ah for my boat!
Hello Steve,? sorry for the delay.? ?I can sell you some of my extra cells.? 3.2 v 90 ah? I am happy with my 10 kw? 48v thunderstruck project? We are experimenting with cylinders and prisms for my work projects.? I can assemble and charge (cost only for a bms and bus bars.)? We are adding a phase change material to our boxes to minimize possible heat and waterproof my battery packs. It is a simple blend of paraffin wax and synthetic bees wax. All my projects are experimental at this point. Observed performance is our goal. We do not sell anything commercially.? cost only if you are interested.? 24v? 36v or 48v? ?available we can parallel? 90? ? ?180? ?270 or 360 ah? ? ? I use new West Marine heavy guage plastic battery boxes.??
I will send some pictures tomorrow.? I hope this helps.? ?Terminalift LLC 9444 Mission Park Place Santee, CA 92071 Ph: (619) 562-0355 F: (619) 562-2060
On Sunday, May 31, 2020, 07:53:28 AM PDT, Steve Gjertson < sgjertson@...> wrote:
Hi Larry,?
I have been following this thread and would be interested a 48 v battery system. My email is sgjertson@...?
I have an extra 500 ? ?3.2 v 90 ah?cylinders with??bms devices and chargers. We are using big prismatic cells ?for our next??high voltage battery project ? I could duplicate my 48 v lifepo4?set up and charge only material cost if you are interested ?I will get you some pictures. We are in San Diego? Best regards, Larry Schmitz
On Friday, May 22, 2020, 5:21 AM, Larry Brown <elcapitanbrown@...> wrote: Mine is Thunderstruck too.? For your size boat you can go with air cooled but need to make sure to get and engine compartment fan to circulate air.? No more water intake to get clogged with sea grass or some idiot¡¯s shopping bag floating by as you motor.? One of the beauties of the system.? It should push you just fine.? I use a couple eu2000 generators as backup for long distance trips but for day trips where you need a couple hours at most you can get by on batteries.
Anyway, good luck. ?
Larry On May 21, 2020, at 11:01 PM, Ryan Sweet <ryan@...> wrote:
?
Do you have a link for the batteries you had success with? There are so many on offer and it seems quite hard to find much info about each company except for the us based ones and those are all twice as expensive (I recognize that this is possibly for good reasons).? ?
I have had good luck with my 10kw?thunderstruck kit too. First installed 4??agm?batteries ? 12v 220 ah.?Then after 2 years replaced with lifepo4. An excellent upgrade?I assembled 4 battery boxes with 3.2v 90ah cylinders. Each box 4P4S?Then installed an?ant bms for balancing. The monitor is very good??for checking your system. If you decide to assemble your own battery system invest in a Flir Heat sensor. The Flir connects to your I?phone. You aim it at your wiring assembly under load. It detects hot spot?areas of concern in your connections. Battery, contactor ,controller and motor connections. 48 v 360 ah gives plenty of run time at 40 to 90 amp load.? Best regards, Larry Schmitz
On Thursday, May 21, 2020, 4:16 PM, Reuben Trane via <rjtrane=[email protected]> wrote: Go to and look at their kits. I purchased 2 ea for my 12m Power cat. For your needs a 5kW to 10kW motor should do the job. Hard part is figuring out the reduction. I chose 3:1 to get a max prop RPM of 800.
48Vdc woks best. If it¡¯s in your budget assemble a battery from LiFePo4 cells
Feel free to ask me about my installation.
Reuben
|
toggle quoted message
Show quoted text
Hello Fred,? The 48 v? 90 ah pack is pretty easy to assemble. That will be 16 cylinders.? You can fit them in 1 West Marine heavy duty battery box.? Weight will be about 85 lbs.? ?Just assemble bus bars to place in series. Then add a bms? and charger. I will check costs on these and forward to you. thank you? kind regards Larry Schmitz
?Terminalift LLC 9444 Mission Park Place Santee, CA 92071 Ph: (619) 562-0355 F: (619) 562-2060
On Tuesday, June 2, 2020, 05:27:23 PM PDT, fred jelich < freddyj408@...> wrote:
I'd be interested in 48v? 90ah for my boat! Hello Steve,? sorry for the delay.? ?I can sell you some of my extra cells.? 3.2 v 90 ah? I am happy with my 10 kw? 48v thunderstruck project? We are experimenting with cylinders and prisms for my work projects.? I can assemble and charge (cost only for a bms and bus bars.)? We are adding a phase change material to our boxes to minimize possible heat and waterproof my battery packs. It is a simple blend of paraffin wax and synthetic bees wax. All my projects are experimental at this point. Observed performance is our goal. We do not sell anything commercially.? cost only if you are interested.? 24v? 36v or 48v? ?available we can parallel? 90? ? ?180? ?270 or 360 ah? ? ? I use new West Marine heavy guage plastic battery boxes.??
I will send some pictures tomorrow.? I hope this helps.? ?Terminalift LLC 9444 Mission Park Place Santee, CA 92071 Ph: (619) 562-0355 F: (619) 562-2060
On Sunday, May 31, 2020, 07:53:28 AM PDT, Steve Gjertson < sgjertson@...> wrote:
Hi Larry,?
I have been following this thread and would be interested a 48 v battery system. My email is sgjertson@...?
I have an extra 500 ? ?3.2 v 90 ah?cylinders with??bms devices and chargers. We are using big prismatic cells ?for our next??high voltage battery project ? I could duplicate my 48 v lifepo4?set up and charge only material cost if you are interested ?I will get you some pictures. We are in San Diego? Best regards, Larry Schmitz
On Friday, May 22, 2020, 5:21 AM, Larry Brown <elcapitanbrown@...> wrote: Mine is Thunderstruck too.? For your size boat you can go with air cooled but need to make sure to get and engine compartment fan to circulate air.? No more water intake to get clogged with sea grass or some idiot¡¯s shopping bag floating by as you motor.? One of the beauties of the system.? It should push you just fine.? I use a couple eu2000 generators as backup for long distance trips but for day trips where you need a couple hours at most you can get by on batteries.
Anyway, good luck. ?
Larry On May 21, 2020, at 11:01 PM, Ryan Sweet <ryan@...> wrote:
?
Do you have a link for the batteries you had success with? There are so many on offer and it seems quite hard to find much info about each company except for the us based ones and those are all twice as expensive (I recognize that this is possibly for good reasons).? ?
I have had good luck with my 10kw?thunderstruck kit too. First installed 4??agm?batteries ? 12v 220 ah.?Then after 2 years replaced with lifepo4. An excellent upgrade?I assembled 4 battery boxes with 3.2v 90ah cylinders. Each box 4P4S?Then installed an?ant bms for balancing. The monitor is very good??for checking your system. If you decide to assemble your own battery system invest in a Flir Heat sensor. The Flir connects to your I?phone. You aim it at your wiring assembly under load. It detects hot spot?areas of concern in your connections. Battery, contactor ,controller and motor connections. 48 v 360 ah gives plenty of run time at 40 to 90 amp load.? Best regards, Larry Schmitz
On Thursday, May 21, 2020, 4:16 PM, Reuben Trane via <rjtrane=[email protected]> wrote: Go to and look at their kits. I purchased 2 ea for my 12m Power cat. For your needs a 5kW to 10kW motor should do the job. Hard part is figuring out the reduction. I chose 3:1 to get a max prop RPM of 800.
48Vdc woks best. If it¡¯s in your budget assemble a battery from LiFePo4 cells
Feel free to ask me about my installation.
Reuben
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Ric Sanders
Reuben Trane