Grid Tie Inverter

Oops, I made a couple of bad assumptions. If you're parked in the same place over an extended time you could set up a backfeed/net metering system. The final cost varies wildly from state-to-state because of different incentives. As an example, I have one battery backed system and one non-battery system, and I expect each to hit breakeven in about 20 years from when it became operational. Whatever you full-time breakeven time is, it will be lengthened proportionately buy the amount of time you're away from your backfeed site.