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Posted

Hi all,

I am getting battery voltage spikes on my inverter jumping to 100v (error 03 kicks in) then error 57 (current sensor failed), after I power it down and disconnect batteries and put it back up, it works again but is happening consistently every second morning. (This morning all the settings got reset to default)

I am running the axpert into 100a fuses then into 4x12v 200ah gel batteries, 9x375w panels into combiner box then into the inverter, running offgrid.

Any insights are greatly appreciated.

Thanks, Sandro

Posted
5 hours ago, Sandro said:

I am getting battery voltage spikes on my inverter jumping to 100v (error 03 kicks in)

This is physically almost impossible with a battery in shape. I suspect a loose connection, perhaps even inside the battery. Or a misreading by the inverter firmware. Try to confirm the event with an external multimeter that can record max reading.

Posted (edited)
8 hours ago, Sandro said:

(This morning all the settings got reset to default)

It's sounding like your EEPROM chip may be intermittent. The EEPROM stores all sorts of vital values, like the scale factor for battery voltage measurement, current sensor, and much more. It also stores your inverter serial number, so you can't really just replace the EEPROM with a blank one and tell it to reset to defaults.

[ Edit: the EEPROM (Electrically Erasable Programmable Read-Only Memory) chip is on the control board of most models, separate from the main DSP (CPU) chip. It's a well known and available SMD part, and there are reader/programmers that can read and write the contents. ]

The best thing would be to unsolder the EEPROM chip, copy its values to a new EEPROM chip, and hope that you copied the data when it was reading OK. Though maybe you've lost your serial number already. Does Watchpower or other monitoring software report your machine number with the correct serial number, of one with a 555553... serial number? The serial number with all 5's and 3's is a default serial number, and if the serial number has defaulted like that, you're in for trouble in the form of fault code 90 in 60 days.

The above is tricky repair work; I suspect that many repairers won't be aware of the necessity of getting the serial number correct. Good luck getting it sorted. And hopefully I'm wrong and there is a simple explanation for your woes; perhaps a loose battery connection.

Edited by Coulomb

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