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Author Topic: Suggestions for panel used only for battery upkeep in storage  (Read 1542 times)

Back2PA

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I have a friend with a bumper pull that has an factory installed receptacle near the battery box for plugging in a solar panel. He recollects that it's placarded for 200W max. This makes me think there's already a charge controller installed. He doesn't boondock. He is interested in a panel he can plug in that will do a good job keeping his single battery charged while in storage at his house. Panel can be mounted to RV carport and properly oriented. I suggested he look in the 75 watt range but had no other suggestions. Most of the small systems I see include a controller, and I think he just needs a bare panel. Suggestions? Thx
Scott
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Gizmo100

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #1 on: April 15, 2019, 05:00:30 PM »
I would not assume he has a controller. It a good selling point with the only manufacturing cost being some wire and a connector.

I took a chance on these and have been pretty pleased.

https://www.harborfreight.com/100-watt-solar-panel-kit-63585.html



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Back2PA

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #2 on: April 15, 2019, 05:43:28 PM »
I would not assume he has a controller. It a good selling point with the only manufacturing cost being some wire and a connector.

I took a chance on these and have been pretty pleased.

https://www.harborfreight.com/100-watt-solar-panel-kit-63585.html


The more I think about it I think you're probably right about the controller. I'll pass along the link, probably perfect for his needs. Thx
Scott
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QZ

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #3 on: April 15, 2019, 05:53:11 PM »
They may also be saying 200 watts because of the wire size

HappyWanderer

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #4 on: April 15, 2019, 08:13:11 PM »
Harbor Freight solar: No! No! No!

Their "100 watt" solar is 4 heavy 25 watt panels. For the same price, buy a real 100 watt panel.
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Back2PA

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #5 on: April 15, 2019, 08:30:18 PM »
Harbor Freight solar: No! No! No!

Their "100 watt" solar is 4 heavy 25 watt panels. For the same price, buy a real 100 watt panel.


Which one?
Scott
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Gizmo100

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #6 on: April 15, 2019, 08:31:10 PM »
Harbor Freight solar: No! No! No!

Their "100 watt" solar is 4 heavy 25 watt panels. For the same price, buy a real 100 watt panel.

We're happy with ours (3 Sets) Catch them when they are on sale for $150 each.



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Utclmjmpr

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #7 on: April 15, 2019, 08:55:34 PM »

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HappyWanderer

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Isaac-1

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #9 on: April 15, 2019, 09:20:29 PM »
Renogy makes some fairly good products, though personally I think NewPowa tends to be better built  (Aluminum C channel all the way around the frame vs L channel on 2 sides on most Renogy panels, ...) and comparatively priced.  See https://smile.amazon.com/Newpowa-100W-Start-Solar-Charger/dp/B07JK4NY2Q/
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HappyWanderer

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #10 on: April 15, 2019, 09:22:23 PM »
Lots of better options than Harbor Freight.
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Frank B

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Re: Suggestions for panel used only for battery upkeep in storage
« Reply #11 on: June 04, 2019, 04:32:48 PM »
I have a friend with a bumper pull that has an factory installed receptacle near the battery box for plugging in a solar panel. He recollects that it's placarded for 200W max. This makes me think there's already a charge controller installed. He doesn't boondock. He is interested in a panel he can plug in that will do a good job keeping his single battery charged while in storage at his house. Panel can be mounted to RV carport and properly oriented. I suggested he look in the 75 watt range but had no other suggestions. Most of the small systems I see include a controller, and I think he just needs a bare panel. Suggestions? Thx


I tend to agree with your assessment. In fact, probably something even smaller than 75 Watts will do just to keep it topped off.


New cars that are in storage on a parking lot are commonly equipped with a very small panel that sits on the dash and plugs into the cigarette lighter. Whether these have a charge controller or not, I don't know. However, their intent is just to keep the car battery charged while in storage.


In other words, you don't need a lot, and if the output of the panel is small, it is not going to damage the battery if it is connected without a charge controller.
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