My system has been happily running well (without error) for 6 months - 1 week ago started throwing #38 errors (this seems to correspond to updating firmware) during the peak of the day.
The systems includes;
- Cerbo GX v2.71
- BMV-712 v4.07
- MPPT 150/70 rev 2 v 3.07
- 800Ah lithium battery cells managed by Daly 4S 250 (Cells are Balanced - BMS appears to be working correctly.)
I captured reports from MPPT after each error yesterday;
1:48 pm
Days ago |
Date |
Yield(Wh) |
Max. PV power(W) |
Max. PV voltage(V) |
Min. battery voltage(V) |
Max. battery voltage(V) |
0 |
12/08/2021 |
980 |
771 |
23.59 |
12.43 |
14.52 |
1:57pm
Days ago |
Date |
Yield(Wh) |
Max. PV power(W) |
Max. PV voltage(V) |
Min. battery voltage(V) |
Max. battery voltage(V) |
0 |
12/08/2021 |
10 |
559 |
22.34 |
12.49 |
13.79 |
2:09 pm
Days ago |
Date |
Yield(Wh) |
Max. PV power(W) |
Max. PV voltage(V) |
Min. battery voltage(V) |
Max. battery voltage(V) |
0 |
12/08/2021 |
30 |
559 |
22.34 |
12.49 |
14.05 |
The battery voltage is set correctly - 12v
There is a secondary MPPT 100/20 - setup is consistent and error occurs with this connected or not.
Not sure why this would only start occurring only a week ago? has something changed in the firmware?
Any advice would be greatly appreciated.
