Peukert effect is almost a non issue with LiFeP04, as I understand it. I am not nearly as knowledgeable on lithium batteries as lead so maybe someone who has been running lithium batts for a while and has more in depth knowledge will chime in. And actually, if you run even lead batteries at the 20 hour discharge rate, you can ignore Peukert calculations since the capacity rating is based on the 20 hour discharge rate. Discharge at lower current, and you get out more energy than expected. Discharge at higher current, and you will get less. There is a moral in that somewhere.
Sounds like you have a very practical project started, if any boat project can be said to be practical. It should end up as a great harbor or river launch and trailer cruising sounds like great fun.
I am sure you will want a canopy or bimini of some sort, anyway. As an experiment you can always throw some plywood and equivelant weight of sandbags up there and see if she gets tippy or not, but I think a bit of solar would be fine. As an example, this 300w panel weighs just a bit over 40lbs. A couple of them on a frame that folds or lowers down for towing would be a fantastic range extender and at very low speeds you could go indefinitely. Batteries could even charge while on the trailer, so you would be ready to splash the boat without first charging from shore power. If nothing else, make a solar towing/storage cover for the boat and leave the panels behind when you take to the water. Anyway I would keep an open mind about solar charging in general.
---In electricboats@yahoogroups.com, <mryanqld@...> wrote :
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