I am an off grid lifer, been here 17 years won't ever, willingly, choose to go back. We electrified 11-12 years ago with 24v Trojan L-16HC. I was quite careful with my maintenance and that bank lasted me nine years of daily cycling. However, the last 6 months were dismal at best. Anyway, I mention the history as it is my only defense against ignorance about batteries. No science understanding, just seat of the pants daily charge and discharge.
A couple years ago, when replacement was needed, we decide on Iron Nickel and on Iron Edison as the dealer. I cannot say enough positive things about Brandon and Maggie Williams (owners of Iron Edison). Stellar individuals that really have there customers in mind and do ALL they can to help and ensure the product is understood and performing properly. I do love my batteries and I think the payoff will come but, obviously, that is along time from now. I have a neighbor with IN cells and we have fiddled and think we have found the sweet spot for DOD cycling parameters and it requires a more detailed description about what happens when you pass ~40-50% discharge. We have noticed that the cells discharged below 50% all the way to 80% discharge behave in line with the literature. That is, they will recharge and show no damage. They will fully recharge, however, the amount of energy to recharge the the 50-80% portion of the deep discharge is much greater than the energy required to recharge 30% on the top 40-50%. That is the only qualification I feel that the literature/information needs. You can deep discharge without damage but it will cost you to smile at the e-meter again.
Since we have backed off to a 40% discharge we are seeing stronger performance easier charging cycles and with an occasional overcharge the performance is fantastic. Water consumption is higher but even that has been largely mitigated with a slightly more gentle treatment.
