Rolf Bartels Posted December 1, 2020 Share Posted December 1, 2020 Hey Guys, I was hoping someone here can help me with the correct voltage settings for my charge controller. I have an 2 x 7s80p 18650 DIY powerwall, I would like the voltages to be configured as follows Fully charge 28.35v ( 4.05v per cell) Fully discharge 23.8v ( 3.4v per cell) The Tracer 10415AN has the configurable settings, and what I have them currently set at. Charging Limit Volt 28.35 Boost Charging Volt 28.07 Float Charging Volt 27.39 Boost Reconnect 27.17 So the above numbers was using Epever's Li-Ion settings and just converting them to 24v and reducing based on the fact I want 4.05v per cell, my problem is that niether the boost or the float we high enough to achieve 28.35v ? should I not be setting the those 2 to 28.35v and then the boost reconnect to 28.2v, that way when I start to add load the boost will kick in and provide the majority of the load from the solar rather than cycling the batteries ? Quote Link to comment Share on other sites More sharing options...
Richard Mackay Posted December 1, 2020 Share Posted December 1, 2020 Shooting from the hip I reckon your charge controller is designed for lead acid batteries... Quote Link to comment Share on other sites More sharing options...
Rolf Bartels Posted December 1, 2020 Author Share Posted December 1, 2020 Hey Richard, yeah that's not it, it does support Li-Ion, but I am not using a commercial battery, I built my own Powerwall so I need to use manual settings, I'm trying to understand to charge Li-Ion batteries what the recommendation is from others Quote Link to comment Share on other sites More sharing options...
Richard Mackay Posted December 1, 2020 Share Posted December 1, 2020 6 hours ago, Rolf Bartels said: So the above numbers was using Epever's Li-Ion settings and just converting them to 24v and reducing based on the fact I want 4.05v per cell, my problem is that niether the boost or the float we high enough to achieve 28.35v ? should I not be setting the those 2 to 28.35v and then the boost reconnect to 28.2v, that way when I start to add load the boost will kick in and provide the majority of the load from the solar rather than cycling the batteries ? I haven't heard of boost being used for Li-Ion batteries so I reckon you should be able to achieve the voltages without it. (Boost is used for equalising lead acid batts) You have 7 cells in series in your battery bank, right? Forget about the load for now. Just get the charge controller to charge the batteries. Go back to the supplier/manufacturer of the charge controller.. Quote Link to comment Share on other sites More sharing options...
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