question

alda avatar image
alda asked

Low batt. voltage alarm

After one and half year running, I get two times this alarm :

1709121340732.png

Really don't know what's a reason or how to trace a reason of this alarm

Do you have any idea what is reason or how to find a reson ?

Thank you for your help


MPPT Controllers
1709121340732.png (8.5 KiB)
2 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.

brucesterj avatar image brucesterj commented ·

I got more where that came from.. Wanna see 'em..?annotation-2024-02-28-215314.jpg


It could be a hardware issue but probably in the settings.. or a combination. Who setup yours..?

0 Likes 0 ·
annotation-2024-02-28-215314.jpg (119.8 KiB)
alda avatar image alda brucesterj commented ·

But you have only warnings. Warning I have disabled, because I had also a lot of warnings. But I received alarm. Setup was done by the specialists.

0 Likes 0 ·
1 Answer
Alexandra avatar image
Alexandra answered ·

@Alda

Without knowing more about your system, it probably means the battery disconnected for a short period. This is possible in the case of a lithium. It is also possible for a breaker type disconnect to partially and cool down and reconnect.

What other components are in the system, how are they connected.


7 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.

alda avatar image alda commented ·

Sorry. I will try give you more details. Battery is 3x pylontech US3000c

and looks like alarm was in 11:38 today :

1709128884298.png

1709129034520.png


0 Likes 0 ·
1709129014928.png (189.3 KiB)
alda avatar image alda alda commented ·

1709129483458.png

0.5V difference, not sure if it's ok

0 Likes 0 ·
1709129539079.png (217.2 KiB)
Alexandra avatar image Alexandra ♦ alda commented ·
Pylons start balancing at 90% SOC or around 50v. So you would.need to charge them up to at least 51 or 52v for balancing to happen.

47v is quite close to the cut off voltages for pylontec. Chances are the VRM is missing the lower dip as well.

In short your batteries need a good charge.


0 Likes 0 ·
Show more comments