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solarrox

Solar PV System DC fuse keeps blowing

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solarrox

Hi!

 

I have a 6.5Kw system installed with a SMA Sunnyboy inverter. Works great normally. One DC fuse blew 2 years ago and I replaced. However, it blew again repeatedly every 6 months. There are four DC fuses and this particular one keeps blowing. Any idea why this is happening?

 

I am not a Pro.

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binky

Overloaded fuse? 

 

What panels, quantity, string arrangement and which inverter? 

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solarrox

SMA Sunnyboy 7000us. 

200W panel, sun power I think. 

not sure about string arrangement.

i do have a pro coming out next week

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binky

USA model inverter? How many panels?

 

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solarrox

32 panels

Yes, US model. its installed in California. 

the original installer has gone out of business

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binky

OK, I'll run it through my software next week - I'm away for the weekend visiting the outlaws. Might be worth contacting SMA technical helpline - very helpful people.

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