Mammoth ordered! And now in production!

zb39 wrote:
That is light for batteries. Nice!! My 6 volts are 72lbs each and the inverter is 74lbs. So 506lbs plus a few for cables etc. Batteries were $80 each and inverter was about $1150 with the remote panel.

3 pairs of golf cart batteries gives about 330 usable Amp hours if you are willing to discharge down to 50%. Personally I like to stay at 70% or higher. That's plenty of power for everything aside from extended Air Conditioning or heating. Our current bank is 425 (200 usable) and we stay at 70% or higher which gives us about 125 Amp Hours of usable battery. This combined with solar panels keeps everything running nicely minus any high draw items like microwave, electric cooktop, A/C etc. Things we are wanting on the next camper.

Lithium bank that would provide 300 Amp Hours would weigh around 125 pounds so there is a big weight savings. The obvious disadvantage is cost. A drop in replacement Lithium Iron 300 Amp battery is about $3,500 dollars. You do get that back over time in the number of expected cycles. The bank I am considering needs to be assembled from 3.2v/180A cells. This configuration is about $600 per 12v /100A group. (the cells I am looking at are 3.2v 180Amp so 4 groups will give about 700 Amp hours, at least 600 usable) Load tests I have see on these batteries using manufacturer recommended charge and discharge depths have shown them to safely deliver full Amp Hours advertised.



http://www.calbusainc.com/calb-ca-series/