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Poor quality PV fuses

bluwater
in Solar Power

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For the past few days, I was only getting maximum 1500W from a 3800W PV installation. Previously I was getting up to 2900W max from the same array. Diagnosed the fault to these fuses. The fuse is rated at 20amp and maximum continuous current draw on the wire was only about 15amp. The fuse is still functional but the housing has melted probably due to poor internal connection. The two on the right have melted and fused together.

Bought these from Aliexpress. If you are looking to buy fuses, stay clear of these.

https://www.aliexpress.com/item/1pc-Fuse-Holder-Protective-MC4-Connector-Protection-1000-VDC-Male-To-Fem-PV-Photovoltaic-Solar-Diode/32884207033.html?spm=a2g0s.9042311.0.0.27424c4dhTAMXi

 

 

 

IMG_20190501_121013.jpg

IMG_20190501_120950.jpg

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