600 Watts With 10 Gauge Wire

[JRH]

I currently have a Midnite Solar MNEPV breaker. It's rated to 150VDC but it is polarized and I only have one on the positive wire. NEC states that both PV wires should be fused.

A 2-pole breaker rated for sufficient DC voltage and amperage should be used. Below is a link to what I believe is a representative example of what some people are using. This is not a specific product endorsement. I have not used this breaker.

https://www.amazon.com/dp/B095YFQWHK

I've seen several threads mention this type of breaker for a PV disconnect.

I thank you… I have Seen that… in the middle of upgrading much of the system and still pondering certain things.. it’s not always easy and many adverts and literature play dodgeball with ya at times.
Jim.

 

[rmaddy]

This one is rated at 72v but some people ran more volts without issues. I ran around 60v for a few months without issues.

This one?:

https://www.amazon.com/Gloaso-Amp-Circuit-Breaker-Surface-Mount/dp/B07DJ6Q6PT

That's rated to only 48V. But I'm sure it's a cheap breaker found under many brands. Perhaps you have a version that really is rated at 72V. Do you have a link?

 

[JoeHam]

I use C65H-DC 2-P double pole breakers from Amazon. Search that and you will find some.


Rated for 250V DC and commonly found in 16, 32 and 63 Amp capacity.

Just one example :

2P 250V Low-voltage DC Miniature Circuit Breaker For Solar Panels Grid System Din Rail Mount 16A - - Amazon.com

2P 250V Low-voltage DC Miniature Circuit Breaker For Solar Panels Grid System Din Rail Mount 16A - - Amazon.com

www.amazon.com

Top is line, bottom is load.

 

[vashkoproimage]

This one?:

https://www.amazon.com/Gloaso-Amp-Circuit-Breaker-Surface-Mount/dp/B07DJ6Q6PT

That's rated to only 48V. But I'm sure it's a cheap breaker found under many brands. Perhaps you have a version that really is rated at 72V. Do you have a link?

50 amp Circuit Breaker 12V - 72V DC Circuit Breakers for Trolling Motor Car Travel Trailer Solar Panel Marine Boat Motorhome Manual Camper Reset Trip Switch : Amazon.sg: Automotive

50 amp Circuit Breaker 12V - 72V DC Circuit Breakers for Trolling Motor Car Travel Trailer Solar Panel Marine Boat Motorhome Manual Camper Reset Trip Switch : Amazon.sg: Automotive

www.amazon.sg

 

[rmaddy]

50 amp Circuit Breaker 12V - 72V DC Circuit Breakers for Trolling Motor Car Travel Trailer Solar Panel Marine Boat Motorhome Manual Camper Reset Trip Switch : Amazon.sg: Automotive

50 amp Circuit Breaker 12V - 72V DC Circuit Breakers for Trolling Motor Car Travel Trailer Solar Panel Marine Boat Motorhome Manual Camper Reset Trip Switch : Amazon.sg: Automotive

www.amazon.sg

Yep, that says 72V. Then you should be fine at 60V.

 

[JRH]

Just a thought, has anyone got any experience or knowledge with large Anderson connectors being used as a total disconnect only ,for an pv array ( that’s already fused) … the ones I had on a mid sized snow plow truck for years we’re very reliable ,simple and not real pricey…
Jim.

 

[vashkoproimage]

What size fuses do I need at the solar panels? Also I noticed I’m only getting 470-490 watts from 600 watts of panels on sunny days. It that normal for 600 watts?