Dr. Dickie
Member
- Joined
- Sep 23, 2020
- Messages
- 363
1) I am getting into lithium iron phosphate (which was always my ultimate goal)
2) I have a 7s 20p 18650 (24V) battery I made for the fan in my solar shed
Currently I have a couple or 6 cheap 20-40 amp solar charge controllers, they work fine for lead acid. However, not so great for 18650 or LiFePO4
I was looking for a controller that I could set the voltages for (bulk, adsorb, float). I thought I found one, but no it is the same old crap where you can set voltages only up to 15V, which is no good for the 24 V battery I have. The current charge controllers I have (like most cheap ones) want to charge the cells to 4.1 V, I don't want to charge them that far, as the battery get very little to no use and does not need to be charged over 3.9 V.
Does anyone know of a decent solar charge controller that is under $500 (so not a Midnite solar--which I have and love, Outback, etc) that will allow me to set the voltages that I want.
I have looked high and low and cannot find one, so perhaps they do not exist. If I have to pull the trigger on another Midnite for my LiFePO4 so be in, but before I dive all in (I am only getting 8 280 Ah cells to start) I would like to do it on the cheap and scale up after I move and build the large LiFePO4 system.
Thanks
2) I have a 7s 20p 18650 (24V) battery I made for the fan in my solar shed
Currently I have a couple or 6 cheap 20-40 amp solar charge controllers, they work fine for lead acid. However, not so great for 18650 or LiFePO4
I was looking for a controller that I could set the voltages for (bulk, adsorb, float). I thought I found one, but no it is the same old crap where you can set voltages only up to 15V, which is no good for the 24 V battery I have. The current charge controllers I have (like most cheap ones) want to charge the cells to 4.1 V, I don't want to charge them that far, as the battery get very little to no use and does not need to be charged over 3.9 V.
Does anyone know of a decent solar charge controller that is under $500 (so not a Midnite solar--which I have and love, Outback, etc) that will allow me to set the voltages that I want.
I have looked high and low and cannot find one, so perhaps they do not exist. If I have to pull the trigger on another Midnite for my LiFePO4 so be in, but before I dive all in (I am only getting 8 280 Ah cells to start) I would like to do it on the cheap and scale up after I move and build the large LiFePO4 system.
Thanks