EV Hilux Lithium now Wind /Solar Lithium

Author	Message
karrak Newbie Joined: 01/11/2014 Location: Australia Posts: 4	Posted: 06:59pm 03 Dec 2014       Thanks Trev for the reply,   Trev said   G'Day Simon, Don't waste your time trying to convince the 'leaddities'. Yes, I agree with you. It is not them I am trying to convince, I am just trying to counter the misinformation (I am being polite) and abuse and give information to people who want to make an informed choice on what type of batteries to use and how best to use them.   Quote   I think these Lithium cells are doing quite well for the abuse they have seen (in the EV). They are still working like they did when I put them on the house wind/solar system a year ago. Do you have any idea what their capacity is now and whether their internal resistance has increased much?   Quote   The specs say they should be around 2000 cycles at 80% DOD. They have frequently been taken below 80% DOD. Even in the wind/solar system they are constantly discharged very well. With 2 x Latronics PVE 1200 grid inverters constantly feeding from the lithium's, they live around the 80% discharged state. The grid inverters shutdown (pack at 53v) at sundown and then I still draw power from them over night. They would be somewhere around that 2000 cycles now and yet they still soldier on! Do you take them much above 53v (3.3 volts/cell) during the day or does the inverter keep them to this? Simon Off grid 24V system, 6x190W Solar Panels, 32x90ah Winston LiFeYPO4 batteries, BMS (Cellog8+JLD404 Ah meter+ homemade Battery logging + supervision), Latronics 4kW Inverter, homemade MPPT controller