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And all converters/controllers/regulators, consume power themselves. So, stacking two of them is probably going to make these tiny panels ineffective…

This is what I use between my 175w 12v panel mounted on my barn, and a cheap 24v charge controller that maintains the four 4D batteries in my truck and loader while they are slaved together over the winter. Unfortunately your input voltage is way too low for this converter. You would need...

Is yours the little 4x5” panel? In my opinion thats one mistake the military made was mounting them on the cowl. Unless they always park their trucks facing south?

As small as these panels are, you could probably just throw an adjustable voltage boost converter on it, and not even worry about a charge controller. Somebody can probably tell us how many watts they are just by going off the panel size?

Open current voltage 4.4 of just the solar panel. Open current voltage 52.2 at the battery ring terminals on the output side of the solargizer.

I don’t think they are a gimmick, the military just never used them properly, and don’t apply to most civilian usage. I’m think the bigger, more powerful version makes better sense for 90% of applications.

Sounds about right I had 5-6 volts in my mind.

If your dead set on those solargizer panels, post an ad in the parts wanted section, and install the complete unit, but know these little ones are meant to help maintain the battery level, not charge or keep up with any parasitic draws. With an aftermarket controller I think these little panels...

There is one on ebay for too many $. Search Solargizer. I have a NOS one I might let go, will have to see if I can find it. IIRC I checked the open current voltage of these tiny panels new, and it was minuscule. I will try to remember to post up a voltage number for you if I find it. I think the...