Check this out!

[Kristina]

Um, google

http://www.solarhome.org/

Probably would need something like this...

http://www.solarhome.org/solarbatterychargers.aspx

Solar charged batteries seem to be pretty efficient. I have a solar powered electric fence charger, and even in the winter it would run for two weeks without any sun on a full battery.

 

[matt41gb]

Is your tortoise/turtle pen a greenhouse?

-Matt

I call it a sorta greenhouse it has wood sides about 2 ft and in fall I cover it with poly,the first year the center peak was high enough for me to stand up in, but I have lowered the height down to less than 4 ft, I have to crawl around if I need to go in.The only thing I leave in it during winter is the turtles that hibernate.If we get a stretch of good weather I can put the mountain torts out during the day.And it also lets me put them out earlier in the spring because it heats up quick and holds the heat real well.Weeds for food grow all winter in it too. There are some pics under Enclosures --getting ready for winter

That sounds really cool Len. I would just hate the crawling part. I'm 6'3" with bad knees. I don't do crawling, haha!

-Matt