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Old 07-23-2021, 09:34 AM   #1
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Solar panel disconnect switch ideas?

I would like to add a disconnect switch for the solar panels in my 2021 model 24KRS. Has anyone done this and have ideas to share?

My battery manufacturer (Battleborn) recommends disconnecting solar panels and leaving batteries at 80% state of charge for long term storage. Last winter I just climbed up on the roof and disconnected the SAE connector at the roof combiner box. I would rather not climb up onto the roof any more than I need to.

I am thinking of using a rotary battery disconnect switch between the panels and the solar charger, but I have not yet looked to see if I have enough slack in the wiring to make that work.

Any ideas would be welcome.
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Old 07-23-2021, 10:42 AM   #2
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I just put a fuse holder in the hot line from panels accessible right next to controller. Just pull fuse when need to disconnect the panels. Works fine, minor labor involved!!!
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Old 07-23-2021, 07:46 PM   #3
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50amp 12v breaker on amazon, $20....
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Old 07-23-2021, 07:55 PM   #4
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I put one of these on the cable just before the connection to the controller:
https://www.amazon.com/gp/product/B01H3DKGBY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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Old 07-23-2021, 08:06 PM   #5
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Young Marine Circuit Breaker for Boat Trolling with Manual Reset,Water Proof,12V- 48V DC (Surface Mount-)


Amazon
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Old 07-23-2021, 08:11 PM   #6
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Why disconnect the solar? If you do that any parasitic loads will slowly discharge the battery.

I would rather disconnect directly at the battery. I did that using a rotary battery disconnect switch. Turn off and the lithium battery will last for months if not longer.
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Old 07-23-2021, 08:41 PM   #7
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Jerry, I do disconnect the battery from the loads using a rotary switch. There are no loads. The solar controller is connected directly to the battery, though, so will continue to charge the batteries unless I disconnect it.

The manufacturer (Battleborn) recommends storing at 80% SOC and disconnecting the solar panels, although they do say it is not a big deal if the solar panels are not disconnected.

The Young Marine circuit breaker looks interesting.
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Old 07-23-2021, 09:06 PM   #8
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Blue Sea and Midnight Solar make quality breakers than can also serve as service disconnect. Ensure the voltage rating of the breaker is adequate.

There should be a circuit breaker / service disconnect between the charge controller and the battery bank as well.
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Old 07-23-2021, 09:22 PM   #9
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Quote:
Originally Posted by vsheetz View Post
Blue Sea and Midnight Solar make quality breakers than can also serve as service disconnect. Ensure the voltage rating of the breaker is adequate.

There should be a circuit breaker / service disconnect between the charge controller and the battery bank as well.

There is no service disconnect between the controller and the battery - at least nothing that is accessible without digging into the underbelly junction box. If there is a circuit breaker it is an auto-reset device in the junction box.

The existing system (one solar panel and a charge controller) was built by ORV as standard equipment. I trust that they designed it following good design principles.

I will look at Blue Sea. I have used their products before.
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Old 07-24-2021, 08:18 AM   #10
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I recommend the Blue Sea brand. They're aren't subject to tripping due to ambient air temp. I had to replace two of the cheaper generic units that tripped in 100 degree heat with ones from Blues Sea.
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