From my experience with off grid homes, I have used the L16's, down to 6 volt golf cart batteries, and my last install was AGM. This was 18 years ago, the owner with the 6 volt golf cart batteries is on his 4th set, the L16 is on his second set, and the AGM is still on the same batteries. I'm glad you mentioned your bank size of 860 A/hr, how about 2 volt single
cell AGMs? These are the batteries that have managed 18 years to date, and I have AGMs that are 17 years old.
SOLAR STAR VRLA AGM BATTERIES
Go with what Cotemar
says, since China
has entered the solar market, $1.13 per watt vs. the over $5 per watt I last paid for them.
If you decide on flooded, go with 2 volt cells and use hydrocaps. No more watering or explosive hydrogen build up in the bilge
Back to AGM
2 volt, 700 a/hr
$1439.82 for six to be wired in series, and since your knowledgeable in battery
care, look for at least a 15 year life.
Tom invites you to call him with your questions, below is how he feels about battery
The Solar Star Line of batteries have been made for and designed by The Solar Biz to meet the needs of our customers for good quality, high amp hour, 2 volt cells. Our Solar Star 2 Volt cells enable you to have a single
, high quality, series connected string, of enough amp hours to provide decent autonomy. In the past in order to achieve a higher amp hour bank of batteries, most folks resorted to multiple parallel connected strings of smaller batteries. This design was an expensive compromise that resulted in a drastically reduced life of the battery bank. Parallel connected strings of the kind of batteries most folks buy are never impedance matched. This scenario makes equal charging
quite difficult, resulting in bad cells in the string with the most resistance in a short amount of time, around 3.5 to 4.5 years. I think batteries are too expensive and too heavy, to have to replace in this short time period. There is not enough space here to answer all of the questions that the foregoing raises, so call Tom at 888-826-0939 and he will be happy to discuss this with you. Tom has 40 years experience with batteries in all sorts of situations, everything from Over the Road Trucks to remote
off grid systems, heavy equipment
, boats, RV's, aircraft, telecom, on grid back-up, computer network back up, commercial
power back-up... the list goes on. If you have any questions about batteries Tom has probably designed and installed it... and, he talks alot!