Forum Discussion

Mello_Mike's avatar
Mello_Mike
Explorer
Dec 22, 2015

Solar Advice Needed - Renogy Solar Suitcase Install

I'm a long-time solar power user and have had solar power in my last three RVs. I currently have a 240 watt solar power system in my truck camper. I'll soon be upgrading my system from a Zamp PWM to a...
Almot's avatar
Almot
Explorer III
Dec 22, 2015
Are you adding parallel 2*50W/12V to parallel 2*120W/12V?

If it's 2*120W/12V, it will work, all 4 panels, on your MPPT, but it won't be efficient because panels are so different. It's better to add a single 120W and wire 3 panels either in parallel or in series. With series wiring watch out for voltage limit of controller.

Don't know whether using an old PWM with 2 panels and MPPT with 2 other panels will be more efficient than all 4 on one MPPT - there will be quirks with this scenario either.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,211 PostsLatest Activity: Mar 08, 2025