It is important to realize that photovoltaic power systems are expensive when compared with the low price of utility power in North America and the rest of the world. Normally.

You should reserve the electric power produced by photovoltaic modules for your most energy-efficient appliances, tools, lights, etc.

Although it is technically possible, heating with photovoltaic systems is generally not recommended. You can easily and more efficiently collect heat with a solar thermal system.

A solar water heater or a solar pool heater, as mentioned earlier, generates more hot water with less initial cost than any photovoltaic-powered heater.

Also, for cooking, it is normally more cost-effective and convenient to use a stove that operates on propane or natural gas rather than solar electricity.

Stand alone solar-powered homes and cottages often rely on wood cook stoves for cooking and space heating. Refrigerators are becoming more energy efficient, so the cost of operating them with solar power is now feasible. There are some great energy-efficient products now.

From an economic point of view, first consider investing in energy-efficient electric AC appliances, and then size your photovoltaic system based on actual consumption (read our post on How to Size your Home Made Renewable Energy System). For example, using compact fluorescent lights will reduce your electrical consumption for lighting by 80 percent or more.

In our next post we will discuss the types of solar panels to choose. Stay tuned