Can etrailer 100w portable solar panel charge 2 6v battieres?

Updated 08/05/2025 | Published 07/24/2025

Question:

Can I use this panel to charge two 6V batteries wired in series for 12V?

asked by: Darren

Expert Reply:

Darren, you’re in good shape. As long as your two 6V batteries are wired in series to form a 12V bank, the etrailer 100W portable panel # e28VV will work great.

The included PWM controller supports 12V systems and will safely charge your batteries without risk of overcharging. Just hook the red output cable to the positive post on one battery and the black output cable to the negative post on the other. Since your batteries are AGM, just use the lead acid setting.

What type of batteries are you using?

expert reply by: Andrew N

Jon

8/5/2025

Hey Andrew, any idea how long it would take this panel to recharge the batteries after a weekend of dry camping? thanks, Jon

Andrew N.

8/5/2025

@Jon Great question. It depends on your battery size and how much you’ve drained them, but as a rough estimate, the 100W panel can put about 5 to 6 amps per hour into your battery in full sun. So if you're down 40–50 amp-hours, you’re looking at a solid day or two of good sunlight to bring them back up. It’s great for topping off and maintaining charge between trips or when you're using light loads.