question

moritz avatar image
moritz asked

MPPT 75/15 Low output

Hi all,


I recently installed my 160W SemiFlexiable Solar Panel and the MPPT 75/15 on my car.

I have checked eveything and eveything seems to be fine.


But when I take a look in the app the controller is not really charging.

It always shows something like 6 - 12W (even in full, bright sun with clear sky).


Things I already did:

- Measured voltage on panel (20 - 21 V)

- Measured Volage when conntected (see app)

- Measured current if conntected to the MPPT 75/15 (same result as in App)

- Started some usage on the battery (battery voltage goes dosnt but current not up).

- Performed a factory reset

- Checked fuse

- Removed solar panel and battery -> reconnected battery then solar panel


Any suggestions what might be the problem?



Thanks,

Moritz

MPPT Controllers
screenshot-20200528-145646.jpg (77.3 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
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Can you disconnect the panel and see what the solar voltage shows in the app?

4 comments
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.

moritz avatar image moritz commented ·

Thanks for the answer, I have tested it and the app shows a current of 0.01V

0 Likes 0 ·
Show more comments
moritz avatar image moritz commented ·

Very strange, I went to the Car and connected via App to shoot this screenshots:



As I connected the panel again it shows something like this:


It shows about 50W which seems to be not much for a 160Wp in direct sun. Shout that be more?


Thanks,

Moritz

0 Likes 0 ·
screenshot-20200528-152146.jpg (75.9 KiB)
screenshot-20200528-154935.jpg (116.1 KiB)
screenshot-20200528-155114.jpg (79.2 KiB)
screenshot-20200528-154935.jpg (116.1 KiB)
Show more comments