RockPaperScissors
New Member
- Joined
- Oct 29, 2021
- Messages
- 19
So the SCC, solar charge controller, I'm using has a separate interface to output 12v power for a load up to 15A. It has a separate sensor attached to a LiFePo4 battery to monitor temperature and voltage.
The SCC will power the Load interface if there is enough power from the solar panel even if the battery is disconnected. It is programmed not to charge the battery when the battery temperature drops below 40F.
The circuit should allow the heat pad to keep the battery warmer than 40F as long as there is battery power. The SCC will shut down the Load interface if voltage drops to 11V.
Once there is sun on the solar panel, the SCC will wake up and check the temperature. If it is too cold, it won't try to charge the battery, but it should power up the Load interface which will start the Temperature Control which has its own temperature sensor. If it is cold enough, it will connect the relay which powers up the heat pad on the battery. I think I saw 50F as the optimal temp to try charging the battery in another discussion.
Heat pad reaches a max of 135F. Operating temp for the battery is max of 140F.
Think this will work?
Bad MSPaint circuit attached. Only showing + wires, except for relay for heat pad.
The SCC will power the Load interface if there is enough power from the solar panel even if the battery is disconnected. It is programmed not to charge the battery when the battery temperature drops below 40F.
The circuit should allow the heat pad to keep the battery warmer than 40F as long as there is battery power. The SCC will shut down the Load interface if voltage drops to 11V.
Once there is sun on the solar panel, the SCC will wake up and check the temperature. If it is too cold, it won't try to charge the battery, but it should power up the Load interface which will start the Temperature Control which has its own temperature sensor. If it is cold enough, it will connect the relay which powers up the heat pad on the battery. I think I saw 50F as the optimal temp to try charging the battery in another discussion.
Heat pad reaches a max of 135F. Operating temp for the battery is max of 140F.
Think this will work?
Bad MSPaint circuit attached. Only showing + wires, except for relay for heat pad.