astronajar
New Member
- Joined
- Aug 22, 2022
- Messages
- 5
Hello everyone. I have the following solar charging system:
- A 200 watts Renogy Solar panels.
- 100 amps 12.8 volts epcom litium LiFePO battery
- A 40 amp Epever MPPT.
The solar panels include their own solar charge controller.
I bought the MPPT because in several videos it was mentioned that they have better performance in charging batteries compared to a solar charge controller.
The problem/question/doubt I have is the following:
- When I charge the battery with the included solar charge controller, it takes an average of 5 hours to charge the full battery.
- Then for test purposes, I used the MPPT twice, following this procedure:
- I configured the MPPT to charge lithium LiFePO batteries
- I fully discharged the battery
- Then I started to charge it with the panels and the MPPT,
The weird thing I found is that, after an hour/hour and a half, the MPPT indicated that the battery was fully charged. It is that possible ?
After that, I disconnected the MPPT and connected the battery to the solar charge controller. Then it took like another 4 hours to charge,
and the solar charge controller indicated that it wasn't fully charged.
BUT, if i do a test with a voltmeter or reconnect the MPPT alone, it sais that the battery is fully charged.
What I am missing/misunderstanding ?
Thank you for your help !
- A 200 watts Renogy Solar panels.
- 100 amps 12.8 volts epcom litium LiFePO battery
- A 40 amp Epever MPPT.
The solar panels include their own solar charge controller.
I bought the MPPT because in several videos it was mentioned that they have better performance in charging batteries compared to a solar charge controller.
The problem/question/doubt I have is the following:
- When I charge the battery with the included solar charge controller, it takes an average of 5 hours to charge the full battery.
- Then for test purposes, I used the MPPT twice, following this procedure:
- I configured the MPPT to charge lithium LiFePO batteries
- I fully discharged the battery
- Then I started to charge it with the panels and the MPPT,
The weird thing I found is that, after an hour/hour and a half, the MPPT indicated that the battery was fully charged. It is that possible ?
After that, I disconnected the MPPT and connected the battery to the solar charge controller. Then it took like another 4 hours to charge,
and the solar charge controller indicated that it wasn't fully charged.
BUT, if i do a test with a voltmeter or reconnect the MPPT alone, it sais that the battery is fully charged.
What I am missing/misunderstanding ?
Thank you for your help !