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ziadabdullah avatar image
ziadabdullah asked

23 of (SmartSolar MPPT 250/100 ) Stop Working

Could you please read the following, and help us to understand and avoid this issue in the future: We have Added three Inverters type Quattro 15Kva to our existing Solar system which was consisted of (6 )Inverters type Quattro 15Kva and (23) MPPT Solar Chargers controller Type (SmartSolar MPPT 250/100 ), we reconfigured the 9 inverters to work as 3 phase inverters ( 3 inverters for L1, 3 inverters for L2, 3 inverters for L3), and the system working for about 4 months without any problem, a few days ago all MPPT solar chargers stop working ( one of MPPT solar charger was burned, and 19 MPPT solar chargers not working and no led flashing, and 4 MPPT solar chargers not working and blue light flashing every 2 or 3 seconds.)

I need to know why these problems happened.

Please Know that the MPPT solar chargers voltage is ( absorption =55.2V,float=54V, equalization not active (disable ) ), but four months ago when we add the new 3 inverters (Quattro 15Kva ) and reconfigured the system, we forget to reduce the default setting of inverter charge voltage, so the inverters setting is ( absorption =57.6V,float=55.2V, equalization not active (disable )), is that configuration could cause the above problems ??.

MPPT Controllers
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3 Answers
wkirby avatar image
wkirby answered ·

The Quattro higher charging settings would not cause this problem with the MPPT. The MPPT can withstand higher battery Voltage, it is possible to set MPPT battery Voltages to ~70V (for example).

Surely it was a common problem to cause failure of all units at the same time, lightning or some sort of problem on the PV side? Could the 250V maximum PV Voltage have been exceeded somehow?

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ziadabdullah avatar image ziadabdullah commented ·

Thank you , I forget to say all grounded devices in the solar room such as the 9 inverters , CCGX and maxi GX still working .only the MPPT solar chargers failure, all failure units not grounded and have no connection to earthing system , is this indicate for any thing?

The max PV voltage is 186.91V,

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cedarm avatar image
cedarm answered ·

First thing I thought of was PV voltage too high. Was it a sunny cold day?

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ziadabdullah avatar image ziadabdullah commented ·

Thank you. Please see the following pictures from one of the Mppt history , all data is available img-20210727-wa0003.jpg

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b19hpd answered ·

Hi Ziadabdullah.

Did you find what caused this. I am running 1 250/100 and its died today for no reason. Did Victron fix them?

Thanks

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