Idk. For a ten year battery in a nightly discharge application you get 0.28 AH for each amp he purchased even with the OPzS cells. First you have to diéntate to

Idk. For a ten year battery in a nightly discharge application you get 0.28 AH for each amp he purchased even with the OPzS cells. First you have to diéntate to .7 for a nightly discharge rate, then to reach 10 years of life span you have to de rate to 0.4 depth of discharge . So if for example, you need 1600 AH, you would spend $1500 for a 2000 AH lLiFe02 bank, plus 150 for a decent BMS, so $1800 US including shipping. (Just bought our 5th and 6th banks) For the OPzS, you would need to buy 5714 AH to get the same cycle life and longevity, plus you have to write off 38 percent of your charging energy due to voltage and discharge rate discrepancies vs about 10 percent for the LiFeO2. I seriously doubt you could obtain 5700 AH, shipped to your location, for less than $1800.. and then the size, maintenance, and corrosion issues (some of that goes away with the considerably more expensive sealed designs) also add to the headache. If the battery magazine will be subject to below freezing temperatures, both types incur additional risks and energy costs for the lithium, you must heat it prior to charging. For the lead, you will need to add another 40 to 50 percent capacity to meet your target power capacity.