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Open Roads Forum  >  Tech Issues

 > Connect multiple portable solar panels?

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jornvango

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Posted: 11/21/22 03:37pm Link  |  Quote  |  Print  |  Notify Moderator

We have a portable 100W panel from Renogy that comes with a built-in controller. Two cables go to the battery connect on the RV.

How hard is it to connect a second 100W panel?

I assume we'll need to buy a 100W panel without a built-in controller?

Thanks!

CA Traveler

The Western States

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Posted: 11/21/22 04:17pm Link  |  Quote  |  Print  |  Notify Moderator

Probably best to buy a second panel with controller and run both sets of wires to the battery.

Otherwise you'll need to access the controller input wires to connect the second panel. Panels should be identical and the controller has to be spec'd for 2 panels and you may void any warranty.

Very common to connect panels in parallel, series or series parallel with 2 wires going to an appropiate controller.


2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
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Bob


Ed_Gee

Central Oregon coast

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Posted: 11/21/22 06:40pm Link  |  Quote  |  Print  |  Notify Moderator

Must also consider the max capabilities of the charge controller on the single panel. It may not be capable of handling more panels.


Ed - on the Central Oregon coast
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pianotuna

Regina, SK, Canada

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Posted: 11/21/22 09:02pm Link  |  Quote  |  Print  |  Notify Moderator

Not enough information for a good answer. Please send the specifications for the panel and the controller.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

LMHS

NM

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Posted: 11/21/22 09:31pm Link  |  Quote  |  Print  |  Notify Moderator

When I installed the solar panel on the truck camper, I thought far enough ahead to add a "connection hub". That way I can simply add an extra panel or two and plug it into the hub with out having to rewire the whole mess. But I did know that I would eventually add more panels and batteries. The system is sized to a specific size that I will eventually end up with.

valhalla360

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Posted: 11/22/22 01:56am Link  |  Quote  |  Print  |  Notify Moderator

Are the panels the same brand and specs?

If they are the same wattage but different voltage, that could cause issues as the higher voltage panel may waste energy trying to backfeed into the lower voltage panel.


Tammy & Mike
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Tom_M

New Hope, MN

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Posted: 11/22/22 03:14am Link  |  Quote  |  Print  |  Notify Moderator

It's best to have the controller close to the batteries. If possible remove the controller from the panel and install it close to the batteries. Do not place the controller in the same compartment as the batteries if they are flooded lead acid.


Tom
2005 Born Free 24RB
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jaycocreek

Idaho

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Posted: 11/22/22 07:10am Link  |  Quote  |  Print  |  Notify Moderator

I have two 100 watt portable panels that I connect to one of my two portable Renogy solar controllers using a Jackery Y branch..They have the Y branch clones on Amazon...Not sure how your Renogy controller is connected but the two pannels connected, need to go into the input of your controller..The Y branch connects the two panels to make one inputto said controller..


Lance 9.6
400 watts solar mounted/200 watts portable
500ah Lifep04

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