Originally Posted by Hapigo
Trying to design a off grid system for 10 year old sailboat (clean slate). 24 hour consumption 320 amp/hours. Put together a idea of 2- 340w 24v solar panels with mppt controllers. Propeller shaft driven alternator (DC 540 low wind permanent magnet). Talked to a tech at emarine. He said I need to add a third controller for the alternator driven by the prop. Also have to deal with the alternator creating energy on the engine when it is running. Is there a way to tie all three together under one roof? Looked at the sterling prosplit r. So many options....not unlimited budget.. but designing it for multiple years of sailing so would like to do it right. Any and all input greatly appreciated . Forgot to mention 630 a/h house bank
Not too much response here.
You have to put out more info here.
10 yo boat is not sufficient info for the boat.
Engine ? Alternator 12volt? Or 24volt,
Off grid , means your not plugging in. I doubt 640 watts solar is sufficient. How will you generate prop power w/o wind?
If you have a clutch
, and you can mount a pulley or gear
that drives with engine not engaged to your drive system , you may drive a gen not mounted on your engine.
You must do a lot of brainstorming WAY out of the common boat box.
BUT, be not dismayed, because it can and is being done.
Search Arcimedies , for I think spelling may be incorrect?
Concrete boat, no sails
, solar panels adjustable, golf cart motor
coupled to diesel
drive with chain drive ....
The bigger the boat the more real estate for solar panels. Research
your percentages of loss and efficiency.
Done let naysayers daunt you , it's realistic to peruse your dream.