Series and Parallel impossible? 6 batteries, 72 Vdc, One charger

[pbmaise]

Originally Posted by john61ct

LI chemistries other than LFP are much more likely to explode into flames at the least convenient time.

The smaller the boat the less appropriate lead's extra weight and space taken.

If cost is such a big factor make sure to get the design right or much of the money will be wasted.

What is the motivation for using electric rather than a basic outboard?

In addition to the required data above, add

How many kW of panels?

Not feasible to train tourists to operate gasoline powered outboards. Besides fuel price is nearly $6 a gallon here. Add in motor maintenance and electric is a no brainer. The lead battery net weight increase versus all lithium is less than 15 kilos. I am building ten of these. Tourists will be escorted by lead vessel with licensed Filipino captain level 1.

[Shoalbay]

Cool.