question

pietro-baricco avatar image
pietro-baricco asked

Multi RS Solar 48/6000 Error 27

Hello,
I have installed the system on november last year, and it has worked well so far.
Since yesterday I started getting this error (error 27 charger short circuit) and the multi goes in passthru. Only a power cycle will bring it up again. The firmware is updated.
I have two strings of panels, ~ 280v per string, total kwp is 5.5Kw, or about 2.5-3 kw per string.
Battery is a diy 280ah lifepo4.
Is the thing broken?

Thanks

MPPT Controllersmppt rs
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1 Answer
Alexandra avatar image
Alexandra answered ·

@Pietro Baricco

Does your battery have a contactor?

Error 27 for normal mppts

Error 27 for the RS.

Is the error resetting on its own?

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pietro-baricco avatar image pietro-baricco commented ·

The battery BMS has a loud mechanical relay that switches off when a cell goes above 3.65v.
This does not normally occur, but I've seen it happen on some occasions.
The error does not reset on its own, to get rid of it I have to completely turn off the unit.


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Alexandra avatar image Alexandra ♦ pietro-baricco commented ·
Then i guess according to instructions the ubit has developed a fault, would need to be returned ....
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