On my 2017 FC25, the Zamp port on the tongue was wired directly to the battery with no controller. This plug would work well for a portable solar panel with a built-in controller: https://www.renogy.com/renogy-200-wa...olar-suitcase/
On the roof was a Zamp 3-port roof cap (in white): https://www.zampsolar.com/3port-roof-cap . This is how you could connect panels on the roof through the 10 gauge factory prewire. I used these ports to install four SP100 100W solar panels on my roof. I documented the installation with pictures, descriptions, and performance results in the "Solar Show and Tell" thread: http://www.airforums.com/forums/f448...ll-181608.html . To use this 3-port roof cap, you need to buy and connect a controller, many people on Airforms use a Victron. I used a Victron SmartSolar 100/30 which works perfectly with up to 400W of solar panels. The yellow and green solar pre-wires are all connected and fused to the 3-port box and end near your positive and negative bus bar in a bundle of wires. These wires have a label that says "solar". Here are pictures of how to install the controller between the solar pre-wire and the bus bars: http://www.airforums.com/forums/atta...0&d=1539352234
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2021 Northern-Lite 10-2 & F350 DRW PSD, 600W Solar/Victron/600A BattleBorn
146 nights 31,000 miles (first 10 months!)
Sold: 2018 GT27Q, 74 nights 12,777 miles
Sold: 2017 FC25FB, 316 nights 40,150 miles
Sold: 2013 Casita SD17 89 nights 16,200 miles
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