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diy solar

diy solar

UL Listed PV Disconnect/SPD Similar to DIHOOL Product?

theta1540

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Joined
Feb 17, 2025
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Location
Texas
I'm building a 3-string ground mount array. I am not combining my strings. I plan to install disconnects/SPDs on each end, at the ground mount and at the building entrance. I was ready to purchase two, DIHOOL 4-in-4-out (leaving one string open of expansion) linked below. Then I noticed they aren't UL listed.

DIHOOL Solar Disconnect Switch 40Amp DC Circuit Breaker with Surge Protector PV Combiner Box for Solar Panel 4 in 4 Out 1000V (Amazon)

I just want an outdoor rated disconnect/MCB/SPD box with UL Listed components. I see Midnite Solar SPDs seem to be the go-to in the DIY space.

Is there an outdoor-rated junction box similar to the above that is recommended, perhaps with enough space to mount Midnite's SPDs? I can't find any that aren't combiner boxes.
 
What he said - but stress on a metal NEM3R rated box - Make sure it is UL listed with a stamp or other labeling
DIN rail

But - if your goal is to disconnect the PV array before it enters the house you want an IMO brand DC isolator instead of a breaker.

Either just their approved enclosure or the naked version in a metal box.
 

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