To charge WHAT ?????...…….
For the VAN's battery I carry an Auto-store $50 Schumacher....10 amp charge/50 amp starter...….for when I leave the radio ON for a week
I just plug that into the house inverter
To charge the House Bank on cloudy days...I have a 35 amp no-name Converter/Charger....permanently wired....just needing a little generator