Friday, May 27, 2016 at 13:13
I have an MP3129, but mine is branded Powertech, a house brand used by Jaycar.
I have had a couple of these in different applications. They are not top of the line, but are nevertheless quite a good PWM
solar controller.
Despite an opinion to the contrary offered earlier in this topic, I think the panel you asked about only has a
junction box on the back, not a regulator. If it does have a regulator, I suspect the MP3129 will be better and you could and should bypass the one on the panel and wire direct to the MP31219 via that anderson on the camper.
If it is just a
junction box, then obviously just cable it to the Anderson.
The MP3129 is programmable to suit your batteries. Find out the optimum absorption and float voltages for your batteries from the supplier or manufacturer and program them into the regulator. If you don't have the instruction book I can supply one (scanned) or find a link. Just ask.
If 120 watts worked for you before, there is no reason why 125 won't work for you now.
The only thing I can't vouch for is the quality of the panels. Others here may be able to help you out in that regard better than I can.
Cheers
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