How to Make Any Home Appliance Into a Solar Electric Hybrid

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This project is a simple and cheap way to integrate renewable energy into your home by turning your appliances into solar electric hybrids. Here is how it works. A solar panel (or any other renewable power source) charges a storage battery. A control circuit continuously monitors the battery’s voltage. When the battery is fully charged, the circuit automatically turns on a power inverter and switches the appliance from running on grid power to running on the energy stored in the battery. Then when the battery’s voltage drops too low, the circuit automatically switches the appliance back to grid power until the battery is recharged.

This design doesn’t require any modification to the appliance or your home’s electrical system. It can work with any power source that is capable of charging a 12V battery (examples: wind turbines, bike generators, etc.). But most importantly the system is scalable. This design is set up for outputs of up to 75 watts, but by swapping out parts for ones with higher power ratings you can power larger appliances or multiple smaller appliances at the same time. This lets you build a system that fits your energy needs and your budget.

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http://www.instructables.com/id/How-to-make-any-home-appliance-into-a-solar-electr/