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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

I am converting my 24 volt solar powered boat over to LifePo4 from lead acid batteries. My bank today has a shunt in the negative and through my MPPT solar charger I can monitor power both in and out

The conversation was in 2011 and I haven’t heard anything since, so I’m going to go with the “minority” perspective... Eric

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

FYI. Thundersky was sold to SinoPoly whose cells are readily available. And Winston, former owner of Thundersky now markets cells under his own name.

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

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.

This is brilliant, as far as I can tell. :-). I Wonder if we can use an adjustment formula to his calculator to get a better ballpark for our motors. Even though he could not come up with reasoning

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

Before I get to the calculators that are relevant to an electric boat conversion project, let’s discuss the purpose of the calculators and how they work. There are all sorts of calculators

How much to duplicate your setup? I don't know enough about it to try to build it myself. [email protected]> wrote:

This thread along with the 39' conversion thread has been really good!

I knew this was the right place to ask. Thanks, Ric [email protected]> wrote:

My Victron Quattro 5000-120-70 will charge my batteries at 70 amp continuously for days from a 120 volt generator. Been very happy with it, It is a combo inverter/charger, but Victron energy also

Thank youSent from my Samsung Galaxy smartphone.

hey Ric, Try looking for ev onboard chargers. ?This one is the big brother to my boat’s shore charger. https://www.elconchargers.com/catalog/item/7344653/7638130.htm (

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,

Just a quick point---there are 2 ways regen doesn’t yield great results thru a prop on a boat: (1) power ~ speed^3 and (2) efficiency losses. And it’s really speed of the fluid thru the prop that

Also, measure how much your battery voltages sag under load. AGM batteries also dry out and die. Is this the boat that has long been a live-aboard solar catamaran by one of the longtime members in

From a heat perspective, the props could be oversized, but never undersized. The smaller the props the less load on the motor, and if the motor is shaft fan cooled the faster the shaft fan would spin.