?

It’s telling how many people are considering, planning or actually making the move to hybrid or pure electric! ?We are planning 2 x 12kW continuous, prob 48V, as parallel hybrids to our two 135hp diesels on straight shafts, 15+ kW lithium bank, 7-10kW solar array. This is on a 50’ x 16’ power catamaran displacing about 15 tonne.?

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to
electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM
batteries and a 4 channel DualPro charger.? I've had ten great summers
using this configuration on some inland lakes in Ohio. Last summer, I
started noticing the battery capacity wasn't what it was when the
batteries were new.? The Torqeedo would shut down due to "depleted
batteries", but I was always able to turn it off and then back on where
upon I could return home at a slower pace. That is one of the things I
like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain
about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more
usable range.

As an engineer, I like using new technologies so I lean toward the
LiFePo4's.? However, many of the posters I follow on this forum bought
them directly from Chinese suppliers.? With all the COVID 19 disruptions
to business and our government threatening to raise tariffs, I worry
about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any
recommendations for low risk suppliers for batteries.

Thanks,

Pat

Pat,

Battleborne Lifepo4 are made in the US. I just got some batteries from another company in China that shipped in late January, so they were still shipping at that time. About $3k for 13 kwh worth with a BMS. The Tesla option is quite a bit cheaper but since they are pure lithium I don't know if I would want them on a boat. I think the Leaf is NIMH.

Jerry

On April 27, 2020, at 9:43 AM, greenpjs04 <forums@...> wrote:

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to

electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM

batteries and a 4 channel DualPro charger.? I've had ten great summers

using this configuration on some inland lakes in Ohio. Last summer, I

started noticing the battery capacity wasn't what it was when the

batteries were new.? The Torqeedo would shut down due to "depleted

batteries", but I was always able to turn it off and then back on where

upon I could return home at a slower pace. That is one of the things I

like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain

about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more

usable range.

As an engineer, I like using new technologies so I lean toward the

LiFePo4's.? However, many of the posters I follow on this forum bought

them directly from Chinese suppliers.? With all the COVID 19 disruptions

to business and our government threatening to raise tariffs, I worry

about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any

recommendations for low risk suppliers for batteries.

Thanks,

Pat

The Torqeedo Cruise 4 is a 48V system.

I also have one on a small wooden boat, that originally used a gas outboard.

I'm going to attempt running it on a 48V electric bike battery - but the ebike battery only has a 20Ah rating - so this will only be for proof of concept, and clearly won't power the motor for very long, and the motor will have to ONLY be run at very low power.

Are any of the surplus Tesla or Leaf batteries available in 48V banks, or can they be easily configured for 48V?

The ebike batteries are easy to use, and reasonably priced.? Just not sure if they can be combined in parallel??

The ebike batteries typically have internal BMS systems of unknown type.? I'm assuming they should NOT be charged in parallel, and I really don't know how reasonable it would be to connect them in parallel for running.

Thoughts?

John

On Monday, April 27, 2020, 10:03:53 AM CDT, sw via groups.io <v1opps@...> wrote:

Is that 24v or 48v?

Can buy surpluses Tesla ,?leaf or other?packs too

On Monday, April 27, 2020, 07:43, greenpjs04 <forums@...> wrote:

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to
electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM
batteries and a 4 channel DualPro charger.? I've had ten great summers
using this configuration on some inland lakes in Ohio. Last summer, I
started noticing the battery capacity wasn't what it was when the
batteries were new.? The Torqeedo would shut down due to "depleted
batteries", but I was always able to turn it off and then back on where
upon I could return home at a slower pace. That is one of the things I
like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain
about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more
usable range.

As an engineer, I like using new technologies so I lean toward the
LiFePo4's.? However, many of the posters I follow on this forum bought
them directly from Chinese suppliers.? With all the COVID 19 disruptions
to business and our government threatening to raise tariffs, I worry
about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any
recommendations for low risk suppliers for batteries.

Thanks,

Pat

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to
electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM
batteries and a 4 channel DualPro charger.? I've had ten great summers
using this configuration on some inland lakes in Ohio. Last summer, I
started noticing the battery capacity wasn't what it was when the
batteries were new.? The Torqeedo would shut down due to "depleted
batteries", but I was always able to turn it off and then back on where
upon I could return home at a slower pace. That is one of the things I
like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain
about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more
usable range.

As an engineer, I like using new technologies so I lean toward the
LiFePo4's.? However, many of the posters I follow on this forum bought
them directly from Chinese suppliers.? With all the COVID 19 disruptions
to business and our government threatening to raise tariffs, I worry
about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any
recommendations for low risk suppliers for batteries.

Thanks,

Pat

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to
electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM
batteries and a 4 channel DualPro charger.? I've had ten great summers
using this configuration on some inland lakes in Ohio. Last summer, I
started noticing the battery capacity wasn't what it was when the
batteries were new.? The Torqeedo would shut down due to "depleted
batteries", but I was always able to turn it off and then back on where
upon I could return home at a slower pace. That is one of the things I
like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain
about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more
usable range.

As an engineer, I like using new technologies so I lean toward the
LiFePo4's.? However, many of the posters I follow on this forum bought
them directly from Chinese suppliers.? With all the COVID 19 disruptions
to business and our government threatening to raise tariffs, I worry
about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any
recommendations for low risk suppliers for batteries.

Thanks,

Pat

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to
electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM
batteries and a 4 channel DualPro charger.? I've had ten great summers
using this configuration on some inland lakes in Ohio. Last summer, I
started noticing the battery capacity wasn't what it was when the
batteries were new.? The Torqeedo would shut down due to "depleted
batteries", but I was always able to turn it off and then back on where
upon I could return home at a slower pace. That is one of the things I
like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain
about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more
usable range.

As an engineer, I like using new technologies so I lean toward the
LiFePo4's.? However, many of the posters I follow on this forum bought
them directly from Chinese suppliers.? With all the COVID 19 disruptions
to business and our government threatening to raise tariffs, I worry
about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any
recommendations for low risk suppliers for batteries.

Thanks,

Pat

On 27 Apr 2020, at 9:47 pm, Matt Foley <matt@...> wrote:

?

Hi Steve/Rob,

Totally possible to use existing sail drives and add a motor on top. While doable its not trivial and at the end of the day, you may find its just better to go with something already on the market. The devil is in the details which may not be apparent at the onset. Another tricky aspect is getting the motor/reduction/prop just right for efficiency. Electric motors are most efficient near their upper rpm range, and props are most efficient when spinning slow. A typical motor may be anywhere from 4,000 to 10,000 RPM.? Once and awhile you will come across a motor designed to spin at low RPM's which are closer to prop RPM, they are generally big and heavy.?

As per the retractable drives, I'm betting you will keep them down most of the time. Regen on a cat can be significant due to the speed, if you don't need the regen and want to reduce drag, you can spin the props to match the speed of the boat and make the prop "invisible", that doesn't take much power at all.? And adding just a little more power will give you a nice little boost under sail. I find myself motor sailing most of the time, with an electric boat, there is almost no reason not to. Some may call it cheating.?

Matt Foley?

Sunlight Conversions

Perpetual Energy, LLC

201-914-0466

On Sunday, April 26, 2020, 11:24:49 PM EDT, Steven Chmura <contact@...> wrote:

First of all, wow, what an incredible daunting project. ?Do you have a website or info on the progression of your project?

Not really able to offer advice, however, I am working on the planning aspect converting my 44’ FP from ICE to electric. I’m now about 1 yr from conversion. But looking at around 10-12kw motors connecting to my existing sail drive. Based on conversations, considering 20-25kwh bank. I also am planning around a 3kw solar array.?

Anyways looking forward to following the progress and direction you go.

Steve

On Apr 19, 2020, at 5:23 PM, Rob Cave via groups.io <rob@...> wrote:

?Greetings,

Reposting this topic the new group location with some photos. Hopefully some feedback or suggestions.,

Looking for advice on a 15kW 48V electric motors to fit to a Yanmar SD25 sail drive (new model of the SD20).

Application is an under construction 52' sailing catamaran.

Some broad boat parameters:

Ocean going world cruising catamaran – composite epoxy structure.

L 52’, Draft 2’ Weight approx. 8500kg / 19,000lb

Full electric propulsion, galley and other services including hot water.

Motors retractable: 2 x 15kw 48v + regen

Battery bank: circa 16kw 48v

House loads: 24V DC – Estimated peak approx. 3kw

Solar: circa 3kW.

16kW 48v DC gen set.

The plan is to fit motor to a Yanmar sail drive SD25 and complete unit be retractable. This involves a wet lower tube and a watertight inner tube with hull closure plate below the prop – motor and sail drive leg fitted to this at their join. We should be able to couple motor shaft to SD25 upper gear box shaft with a coupler and bolt units together without too many modifications. Be great to hear of others experience with this.

We are trying to limit motor voltage to 48V – makes batteries & solar easier plus ability to share bank via DCC converters & battery for house loads at 24V.

The boat will be light and shallow draft = easily driven. A similar 62’ catamaran was fitted with 2 x OV SD15s and achieved over 9 knots in flat water so we believe 12 to 15kW motors will be adequate.

According to Vic Prop boat specs, twin 12kW (16hp) motors with RPM max of 2200 (2:1 gear reduction on SD25 so prop speed 1100 max.) & 3 blade 15" x 13" prop will yield a top speed of 8.92 kts which is fine.

We have looked at turn-key offerings from Bell marine, Oceanvolt & Electric yachts but none tick all our boxes so would like to have a crack at customizing our own solution.

Some motor options Ive stumbled across include:

1. Motenergy ME1302 or ME1616 Liquid cooled

2. Parker GVM210-100-DPW

3. Go cart or Elec motorcycle motors: Revolt, Zero, ???

Bearing in mind 48V supply and max RPM of around 2400, be grateful to get your thoughts on best motor and associated controller and any tips or constructive suggestions for our project.

<20200420_090143.jpg>

<Elec Sail Drive - retraction system.jpg>

<20200420_085913.jpg>

<20200420_085941.jpg>

<20200420_085951.jpg>

<20200420_090015.jpg>

<20200420_090102.jpg>

On Apr 19, 2020, at 5:23 PM, Rob Cave via groups.io <rob@...> wrote:

?Greetings,

Reposting this topic the new group location with some photos. Hopefully some feedback or suggestions.,

Looking for advice on a 15kW 48V electric motors to fit to a Yanmar SD25 sail drive (new model of the SD20).

Application is an under construction 52' sailing catamaran.

Some broad boat parameters:

Ocean going world cruising catamaran – composite epoxy structure.

L 52’, Draft 2’ Weight approx. 8500kg / 19,000lb

Full electric propulsion, galley and other services including hot water.

Motors retractable: 2 x 15kw 48v + regen

Battery bank: circa 16kw 48v

House loads: 24V DC – Estimated peak approx. 3kw

Solar: circa 3kW.

16kW 48v DC gen set.

The plan is to fit motor to a Yanmar sail drive SD25 and complete unit be retractable. This involves a wet lower tube and a watertight inner tube with hull closure plate below the prop – motor and sail drive leg fitted to this at their join. We should be able to couple motor shaft to SD25 upper gear box shaft with a coupler and bolt units together without too many modifications. Be great to hear of others experience with this.

We are trying to limit motor voltage to 48V – makes batteries & solar easier plus ability to share bank via DCC converters & battery for house loads at 24V.

The boat will be light and shallow draft = easily driven. A similar 62’ catamaran was fitted with 2 x OV SD15s and achieved over 9 knots in flat water so we believe 12 to 15kW motors will be adequate.

According to Vic Prop boat specs, twin 12kW (16hp) motors with RPM max of 2200 (2:1 gear reduction on SD25 so prop speed 1100 max.) & 3 blade 15" x 13" prop will yield a top speed of 8.92 kts which is fine.

We have looked at turn-key offerings from Bell marine, Oceanvolt & Electric yachts but none tick all our boxes so would like to have a crack at customizing our own solution.

Some motor options Ive stumbled across include:

1. Motenergy ME1302 or ME1616 Liquid cooled

2. Parker GVM210-100-DPW

3. Go cart or Elec motorcycle motors: Revolt, Zero, ???

Bearing in mind 48V supply and max RPM of around 2400, be grateful to get your thoughts on best motor and associated controller and any tips or constructive suggestions for our project.

<20200420_090143.jpg>

<Elec Sail Drive - retraction system.jpg>

<20200420_085913.jpg>

<20200420_085941.jpg>

<20200420_085951.jpg>

<20200420_090015.jpg>

<20200420_090102.jpg>

On Sunday, April 26, 2020, 04:28:33 PM PDT, sw via <v1opps@...> wrote:

Just take off the power head ?use the shaft?

On Sunday, April 26, 2020, 08:14:15 AM PDT, Caio <kaigereonspitzer@...> wrote:

Thanks Fred, I hadn’t consider that possibility - how did you do, using a petrol outboard as a basis?

Von meinem iPhone gesendet

Am 26.04.2020 um 16:15 schrieb Fred Jelich <fastfreddy408@...>:

?

I have a home made electric outboard that charges under sail, though it slows the boat some.

On Sun, Apr 26, 2020, 1:50 AM Caio <kaigereonspitzer@...> wrote:

Hi there, I'm new here and I wonder if you could give me any hints on this question that I have been unable to answer (in the positive) by using google and sending questions to manufacturers. I have a 30ft sailing catamaran that has twin petrol outboards sitting in wells in the cockpit. As the cat has daggerboards and retractable rudders, I would not like to fit pod or saildrive type motors to the hulls, but instead replace the existing outboards. However I felt with the lower range of the electric motors - not to overload the boat with batteries - it would be necessary to recharge on long sailing passages - hence my question.

Many thanks in advance!
Caio

On 27 Apr 2020, at 1:24 pm, Steven Chmura <contact@...> wrote:

? First of all, wow, what an incredible daunting project. ?Do you have a website or info on the progression of your project?

Not really able to offer advice, however, I am working on the planning aspect converting my 44’ FP from ICE to electric. I’m now about 1 yr from conversion. But looking at around 10-12kw motors connecting to my existing sail drive. Based on conversations, considering 20-25kwh bank. I also am planning around a 3kw solar array.?

Anyways looking forward to following the progress and direction you go.

Steve

On Apr 19, 2020, at 5:23 PM, Rob Cave via groups.io <rob@...> wrote:

?Greetings,

Reposting this topic the new group location with some photos. Hopefully some feedback or suggestions.,

Looking for advice on a 15kW 48V electric motors to fit to a Yanmar SD25 sail drive (new model of the SD20).

Application is an under construction 52' sailing catamaran.

Some broad boat parameters:

Ocean going world cruising catamaran – composite epoxy structure.

L 52’, Draft 2’ Weight approx. 8500kg / 19,000lb

Full electric propulsion, galley and other services including hot water.

Motors retractable: 2 x 15kw 48v + regen

Battery bank: circa 16kw 48v

House loads: 24V DC – Estimated peak approx. 3kw

Solar: circa 3kW.

16kW 48v DC gen set.

The plan is to fit motor to a Yanmar sail drive SD25 and complete unit be retractable. This involves a wet lower tube and a watertight inner tube with hull closure plate below the prop – motor and sail drive leg fitted to this at their join. We should be able to couple motor shaft to SD25 upper gear box shaft with a coupler and bolt units together without too many modifications. Be great to hear of others experience with this.

We are trying to limit motor voltage to 48V – makes batteries & solar easier plus ability to share bank via DCC converters & battery for house loads at 24V.

The boat will be light and shallow draft = easily driven. A similar 62’ catamaran was fitted with 2 x OV SD15s and achieved over 9 knots in flat water so we believe 12 to 15kW motors will be adequate.

According to Vic Prop boat specs, twin 12kW (16hp) motors with RPM max of 2200 (2:1 gear reduction on SD25 so prop speed 1100 max.) & 3 blade 15" x 13" prop will yield a top speed of 8.92 kts which is fine.

We have looked at turn-key offerings from Bell marine, Oceanvolt & Electric yachts but none tick all our boxes so would like to have a crack at customizing our own solution.

Some motor options Ive stumbled across include:

1. Motenergy ME1302 or ME1616 Liquid cooled

2. Parker GVM210-100-DPW

3. Go cart or Elec motorcycle motors: Revolt, Zero, ???

Bearing in mind 48V supply and max RPM of around 2400, be grateful to get your thoughts on best motor and associated controller and any tips or constructive suggestions for our project.

<20200420_090143.jpg>

<Elec Sail Drive - retraction system.jpg>

<20200420_085913.jpg>

<20200420_085941.jpg>

<20200420_085951.jpg>

<20200420_090015.jpg>

<20200420_090102.jpg>

Am 27.04.2020 um 02:21 schrieb sw via groups.io <v1opps@...>:

?

On Sunday, April 26, 2020, 04:28:33 PM PDT, sw via groups.io <v1opps@...> wrote:

Just take off the power head ?use the shaft?

On Sunday, April 26, 2020, 08:14:15 AM PDT, Caio <kaigereonspitzer@...> wrote:

Thanks Fred, I hadn’t consider that possibility - how did you do, using a petrol outboard as a basis?

Von meinem iPhone gesendet

Am 26.04.2020 um 16:15 schrieb Fred Jelich <fastfreddy408@...>:

?

I have a home made electric outboard that charges under sail, though it slows the boat some.

On Sun, Apr 26, 2020, 1:50 AM Caio <kaigereonspitzer@...> wrote:

Hi there, I'm new here and I wonder if you could give me any hints on this question that I have been unable to answer (in the positive) by using google and sending questions to manufacturers. I have a 30ft sailing catamaran that has twin petrol outboards sitting in wells in the cockpit. As the cat has daggerboards and retractable rudders, I would not like to fit pod or saildrive type motors to the hulls, but instead replace the existing outboards. However I felt with the lower range of the electric motors - not to overload the boat with batteries - it would be necessary to recharge on long sailing passages - hence my question.

Many thanks in advance!
Caio

On Apr 19, 2020, at 5:23 PM, Rob Cave via groups.io <rob@...> wrote:

?Greetings,

Reposting this topic the new group location with some photos. Hopefully some feedback or suggestions.,

Looking for advice on a 15kW 48V electric motors to fit to a Yanmar SD25 sail drive (new model of the SD20).

Application is an under construction 52' sailing catamaran.

Some broad boat parameters:

Ocean going world cruising catamaran – composite epoxy structure.

L 52’, Draft 2’ Weight approx. 8500kg / 19,000lb

Full electric propulsion, galley and other services including hot water.

Motors retractable: 2 x 15kw 48v + regen

Battery bank: circa 16kw 48v

House loads: 24V DC – Estimated peak approx. 3kw

Solar: circa 3kW.

16kW 48v DC gen set.

The plan is to fit motor to a Yanmar sail drive SD25 and complete unit be retractable. This involves a wet lower tube and a watertight inner tube with hull closure plate below the prop – motor and sail drive leg fitted to this at their join. We should be able to couple motor shaft to SD25 upper gear box shaft with a coupler and bolt units together without too many modifications. Be great to hear of others experience with this.

We are trying to limit motor voltage to 48V – makes batteries & solar easier plus ability to share bank via DCC converters & battery for house loads at 24V.

The boat will be light and shallow draft = easily driven. A similar 62’ catamaran was fitted with 2 x OV SD15s and achieved over 9 knots in flat water so we believe 12 to 15kW motors will be adequate.

According to Vic Prop boat specs, twin 12kW (16hp) motors with RPM max of 2200 (2:1 gear reduction on SD25 so prop speed 1100 max.) & 3 blade 15" x 13" prop will yield a top speed of 8.92 kts which is fine.

We have looked at turn-key offerings from Bell marine, Oceanvolt & Electric yachts but none tick all our boxes so would like to have a crack at customizing our own solution.

Some motor options Ive stumbled across include:

1. Motenergy ME1302 or ME1616 Liquid cooled

2. Parker GVM210-100-DPW

3. Go cart or Elec motorcycle motors: Revolt, Zero, ???

Bearing in mind 48V supply and max RPM of around 2400, be grateful to get your thoughts on best motor and associated controller and any tips or constructive suggestions for our project.

<20200420_090143.jpg>

<Elec Sail Drive - retraction system.jpg>

<20200420_085913.jpg>

<20200420_085941.jpg>

<20200420_085951.jpg>

<20200420_090015.jpg>

<20200420_090102.jpg>

Am 26.04.2020 um 16:15 schrieb Fred Jelich <fastfreddy408@...>:

?

I have a home made electric outboard that charges under sail, though it slows the boat some.

On Sun, Apr 26, 2020, 1:50 AM Caio <kaigereonspitzer@...> wrote:

Hi there, I'm new here and I wonder if you could give me any hints on this question that I have been unable to answer (in the positive) by using google and sending questions to manufacturers. I have a 30ft sailing catamaran that has twin petrol outboards sitting in wells in the cockpit. As the cat has daggerboards and retractable rudders, I would not like to fit pod or saildrive type motors to the hulls, but instead replace the existing outboards. However I felt with the lower range of the electric motors - not to overload the boat with batteries - it would be necessary to recharge on long sailing passages - hence my question.

Many thanks in advance!
Caio

Am 26.04.2020 um 16:15 schrieb Fred Jelich <fastfreddy408@...>:

?

I have a home made electric outboard that charges under sail, though it slows the boat some.

On Sun, Apr 26, 2020, 1:50 AM Caio <kaigereonspitzer@...> wrote:

Hi there, I'm new here and I wonder if you could give me any hints on this question that I have been unable to answer (in the positive) by using google and sending questions to manufacturers. I have a 30ft sailing catamaran that has twin petrol outboards sitting in wells in the cockpit. As the cat has daggerboards and retractable rudders, I would not like to fit pod or saildrive type motors to the hulls, but instead replace the existing outboards. However I felt with the lower range of the electric motors - not to overload the boat with batteries - it would be necessary to recharge on long sailing passages - hence my question.

Many thanks in advance!
Caio

Am 26.04.2020 um 16:15 schrieb Fred Jelich <fastfreddy408@...>:

?

I have a home made electric outboard that charges under sail, though it slows the boat some.

On Sun, Apr 26, 2020, 1:50 AM Caio <kaigereonspitzer@...> wrote:

Hi there, I'm new here and I wonder if you could give me any hints on this question that I have been unable to answer (in the positive) by using google and sending questions to manufacturers. I have a 30ft sailing catamaran that has twin petrol outboards sitting in wells in the cockpit. As the cat has daggerboards and retractable rudders, I would not like to fit pod or saildrive type motors to the hulls, but instead replace the existing outboards. However I felt with the lower range of the electric motors - not to overload the boat with batteries - it would be necessary to recharge on long sailing passages - hence my question.

Many thanks in advance!
Caio