The 12V charger I've found is $12.27 shipped. So it is inexpensive enough to buy for the heck of it (which is what I just did!). It is true that it is one more cord to keep track of! And I don't think any payback from power savings from any of this solar powered battery recharging would ever exceed a warm fuzzy. I just know that it is desirable to avoid having to use the inverter to create 120V AC due to efficiency losses if I don't need to. If I was out camping that is and motivated to minimize energy draw from my batteries. While stored at home, the benefit would be not having to get out and walk around the camper to the storage bay where my inverters are to switch one on and having to remember to shut it off later.
