Freep wrote:
3 tons wrote:
“ But a cheap coulomb counter is fine with me because it's an inherently unnecessary device.”
Ok, but for clarity it should be noted here that a meter that only counts coulombs is not structly compatible with LFP, though it may be fine above 50% SOC - in practical terms with LFP, SOC only begins to get important below 50%...
As has been already noted here several times, computing SOC with LFP requires a sophisticated algorithm including a ‘look-up’ ledger which is necessary when below a 50% SOC...This is due to the extremely flat voltage curve characteristics of LFP, and why (as previously stated) I had to ditch my former meter...
This is interesting. There are a lot of people using the AiLi for their LFPs over at diysolarforum.com and I've never heard this before. I'll go ask the gurus over there and see if I can get some clarity. I've been using it for almost a year now and it has usually agreed with the BMS on SOC.
Edit: To be clear, a Coulomb counter does not rely on voltage.
ya there is one supplier that you can buy privat from the guy and he has a good reputation. Aili and the other one are the main places people seam to buy from. DIY solar is pretty week on the RV side. still recomending 12V panels because 24V is dangeorous......
Steve
