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Old 05-25-2016, 09:57 AM   #67
TDunn
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City: Maine Coast
Vessel Name: Tortuga
Vessel Model: Nunes Brothers Raised Deck Cruiser
Join Date: Feb 2015
Posts: 889
Those Firefly batteries are really expensive. I run four Everstart GRP 29 deep cycle batteries (made by Johnson Controls). They are rated at 115 amp-hours, so at 50% discharge I have 230 amp hours available. The cost for the four batteries is $348. Three Firefly batteries would give me about the same available amp-hours at a cost of $1,458. The Firefly batteries would have to last more than 4 times as long to make them worth while. Frankly the cost simply isn't justified from my point of view, particularly since my solar panels keep my batteries near 100% capacity.
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