Heating the studio.
When we decided to move from the camper into the garage it was mostly for more comfort. Rewiring the garage for 12 volt was not that difficult. This allowed us to have low voltage appliances run directly on 12 volts. You can run 12 volt appliances on 110, most appliances come with a converter to reduce the voltage. For lighting we used low voltage LED, so that we did not have to run 110 and convert it. I would not recommend this to anyone if you do not know what you are doing. My husband is a contractor and electrician.
Heating with radiators
Using PEX Pipes, we ran hot water to radiators placed throughout the studio. Red PEX pipe for the hot water coming from the hot water heater and blue PEX pipe for the returning water to the water heater. Using a low voltage circulater pump we ordered from West Marine, this is how the water was pushed from the water heater into the radiators. A thermostat switch hooked to the pump help to control the usage of energy and the temperature in the studio. This worked for a while but was more of a usage on our power source then we needed. This system provided a nice even heat while in the winter we had less sun for storing energy.
Time for a new source of heating. Investing in a wood stove. Found a nice used one on craigslist was no problem. Replacing the seal around the door and clean it up a little it was like new. There are lots of trees on the property giving us a natural source for energy. This was a great replacement for the radiator but not our last. Our next step was working on building a solar water heater that would function as it's own conventional circulater system.
In the summer time I set up an outdoor shower using a teak outdoor shower with a hose running on the top of the camper collecting heat.