Re: [electricboats] Recommendation for 48 v inboard motor + generator.

I would concur about skipping the AGM batteries unless you already have them and even then I would consider switching straight to lithium. Take it from someone who ran lead acid for 10 years and over 5000 miles, lead pails in comparison to lithium and it has gotten so cheap now it is almost on par with lead. Amazon sells 100amp hour, 12v batteries with bms and a charger for less than $300 that can be series to 48V and the ones I bought seem to work great. If freezing is an issue make sure you spec one with freeze protection and consider getting 8 of them to make a parallel bank of two four packs because the bms limits you to 100 amp output. 

If you want to step up to a little higher quality, Signature Solar has a very nice 100amp, 48V, waterproof series with a whopping 5 kWhrs of usable energy for about $1600 each but again I'd consider getting two in parallel because of the 100amp limitation. I've got both systems on the Arc and performance wise I can't tell the difference but I'm guessing the cheap batteries won't last as long. Time will tell but I'm telling you, don't waste your money on AGMs because unless you need cold cranking amps for a big ICE, lead is dead, imo. 

Capt. Carter

www.shipofimagination.com

 

On Thursday, March 23, 2023 at 09:53:52 AM EDT, julienweiller via groups.io <julienweiller=yahoo.com@groups.io> wrote:

Greetings! 

Looking for recommendations to go hybrid (series, not parallel) .

I will need a 48 v electric propulsion plus adequate diesel generator/range extender for a 15000 pound full keel 30 footer sailboat, 24"6" waterline, hull speed 6.5 kn (Baba 30).  

Getting rid of actual engine, a 3 cylinders 30 hp diesel.

Plan is to start with 4 x 12v 150 Ah  AGM (just enough to go dock down the basin) 

Switch to high kWh lithium in the future for ocean sailing  

Will also add solar to the equation. 

I am looking for a diesel generator/range extender that could pretty much keep the batteries up while motoring. 

So, that's a lot of questions at once:
1 motor ?
2 compatible AGM/lithium controller ?
3 diesel generator?
4 solar? 
5 lithium batteries?
6 compatible with all the above +220/110 charger?
7 BMS added if not battery integrated?

Sorry if this is a repeat question but it's 2023 and it seems that technology is fast evolving!

Pretty please: no 96 nor 72 volts suggestions  I am sticking with 48, 52 max.

 

All best and in advance, much thanks!