question

Dosheimer avatar image
Dosheimer asked

MPPT-100/50: panel voltage 12.89V in the night?

Hi,
on my VRM dashoboard the panel voltage of my MPPT-100/50 (Firmware V1.61) is shown significantly >0V during the night, but the panel voltage of my Smart Solar MPPT 100/20 (Firmware V1.61) is shown as 0V (as expected).

Both MPPT´s are connected to my Raspi running Venus OS V.2.82 large 30.

1684757930314.png

1684757987992.png

The shown 12.87V during night does not make any sense in my opinion. It is not the battery voltage (which is 13.48V).

During the day both devices are running without any abnormalities (as far as I can assess that).

Do I have a problem here with a certain backflow or shortshut to the panel or something?

Attached my full system overview.

Many thanks in advance for your kind assistance!

Dirk

ARGO-schematic-energy-system-overview.pdf

MPPT Controllers
1684757930314.png (96.6 KiB)
1684757987992.png (175.9 KiB)
argo-schematic-energy-system-overview.pdf (614.2 KiB)
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
kevgermany avatar image
kevgermany answered ·

Could be wiring, could be a faulty MPPT. Checking the input voltage of the MPPT with a meter would tell you.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.