What MPPT solar charger are people with more than 660w of solar is being used

**msutoad** · 03-27-2024, 10:14 AM

I have 660w of solar on my roof already and am considering expending it. I have the SF 100-50 Solar controller from GD that came with my rig. I spoke with the solar controller mfg and they
said I can not use that controller with more panels based on current load for wire size used from the factory and the controller max of 50amp. What are you all doing that have pretty good sized solar farms on the roof of your rigs? Thanks in advance!!

jason

**Soundsailor** · 03-27-2024, 01:18 PM

Originally Posted by msutoad

I have 660w of solar on my roof already and am considering expending it. I have the SF 100-50 Solar controller from GD that came with my rig. I spoke with the solar controller mfg and they
said I can not use that controller with more panels based on current load for wire size used from the factory and the controller max of 50amp. What are you all doing that have pretty good sized solar farms on the roof of your rigs? Thanks in advance!!

jason

You could go with a serial/parallel setup using Victron's 100V 50A controller (https://www.amazon.com/Victron-BlueS.../dp/B01BPLJASU).

**kb0zke** · 03-27-2024, 01:24 PM

I have just under 1100W of solar on the roof feeding a pair of 24V 200AH batteries. The solar controller is a Victron 150/70. The problem I ran into was a mechanical one, not electrical. I figured that I could fit six panels on the roof, but the first installer said he could only install one, maybe two, panels. The man that did the install, Superstition Solar in Tempe, thought he could fit four panels on. The roof is about 2-3" too short to fit the fourth panel on. My panels are installed in series, so the factory wire is sufficient.

**Riverbug** · 03-27-2024, 02:10 PM

800W in series/parallel using Victron 150/60. Victron has great stuff albeit on the higher end of the price spectrum.

**Second Chance** · 03-27-2024, 02:10 PM

Thread moved to Solar Systems and Generators.

Rob

**msutoad** · 03-27-2024, 03:22 PM

You have 3 panels total in your setup for a total of 1100 watts capable?

**msutoad** · 03-27-2024, 03:23 PM

Originally Posted by Riverbug

800W in series/parallel using Victron 150/60. Victron has great stuff albeit on the higher end of the price spectrum.

you have 3 total panels for 1100 watts capable?

**kb0zke** · 03-27-2024, 08:09 PM

I have three 365W panels in series on the roof, for a total of 1,095W up there. If I had been able to put the fourth panel on, I would have had 2S2P for 1,460W. Unfortunately, the roof was about 2" too short and Jo Ann wouldn't let me put some 2x4 pieces up on the back wall.