Well, if you have the money upfront (they have become MUCH more affordable in the last 10 years), you can always invest in solar panels. From what I understand, they are usually warrantied for about 20+ years, and can save you quite a bit of money in the long run. If you could power your car with them, that's a huge benefit. I believe a system generally costs around $10k-$15K. I'm starting to look into them because once I get my career really going and have some money saved up, I plan on buying some land and building a cabin on it. I plan on making it mostly off grid without giving up too many modern amenities.