question

magicmike avatar image
magicmike asked

ALWAYS USE FUSES ON YOUR SYSTEM >> ALWAYS<< BURNED MPPTS.

EDIT:


Sorry for long delay.

The MPPT's due bad / wrong connections went on fire.

First of all one of MPPT's were over loaded and once one of MPPT's goes on fire then 2nd got power of all panels ( !! 15 PANELS OF 250W !! )

Person who connected all panels and system did not put fuses and all on system as well.

PANELS WERE CONNECTED PARALEL + SERIES / MIXED SERIES.

System was just ticking bomb!

It was my plan to 'fix' connections across current system and make new lines but i got new wires and fuses two days after MPPT's broke. (i was waiting for supply few weeks)

img-20210923-231535.jpg


Inverter is fine.

MPPT'S WERE OVER LOADED FOR OVER 2 YEARS.


Now i have made 5 new strings, 3 panels per string, Ordered 3 MPPT's 150/35 to get it sorted as should be.
Huge thanks to

EcoSolar (Also Repair Centre) from POLAND for quick response and getting me sorted with CORRECT HARDWARE.




EasySolar All-in-One
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marekp avatar image marekp commented ·
If your battery is fully charged (float state) and there is no load, MPPT will not charge the battery and you will not see any production from PV.
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magicmike avatar image magicmike marekp commented ·
all lights on my mppt are gone.

no bulk, absorbtion and float.

ehhh


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marekp avatar image marekp magicmike commented ·
Did you try to connect to this MPPT 250/70 over Bluetooth?
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magicmike avatar image magicmike marekp commented ·

No there is no bluetooth,

its 150/35 (x2) (old)

Ive tried to change SoC settings,

3 lights were on and all disapear. I've new software updated and preconfigured, charger is enabled.

Fuses are ok, voltage on batteries are fine.


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magicmike avatar image magicmike magicmike commented ·


There is two mppts. One per side.

Im worried that mppts are fired some how, but i only changed SoC settings...

img-20210923-203346.jpg


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1 Answer
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

Can you make some pictures of the whole system?
Can you measure the battery voltage at the battery terminals and the PV voltage at the PV terminals of the MPPTs?

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magicmike avatar image magicmike commented ·

Hi,

Sorry for long delay.

The MPPT's due bad / wrong connections went on fire.

First of all one of MPPT's were over loaded and once one of MPPT's goes on fire then 2nd got power of all panels ( !! 15 PANELS OF 250W !! )

Person who connected all panels and system did not put fuses and all on system as well.

PANELS WERE CONNECTED PARALEL + SERIES / MIXED SERIES.

System was just ticking bomb!

It was my plan to 'fix' connections across current system and make new lines but i got new wires and fuses two days after MPPT's broke. (i was waiting for supply few weeks)

img-20210923-231535.jpg


Inverter is fine.

I have ordered 3 New MPPT's and got wiring sorted last week.


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img-20210923-231535.jpg (2.0 MiB)