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The Solar Power Expert Blog

Testing the Solar Charge Controller Schematic

Friday, October 21st, 2011

I was finally able to find some time to test my step down converter prototype. The results showed an efficiency of 71%. That’s not bad for a first prototype! Below, I’ll show all the test data, schematics, pictures, and some of the ideas I’ve come up with for improving the design.

Step Down Converter Prototype Parts

Tuesday, October 4th, 2011

I finally got some time to put together a prototype of my proposed dual voltage converter. I wrestled with myself over how to wind the converter transformer. Depending on how I wind it, I could create a 48v battery charger for my electric bicycle, or I could step it down to charge a 12 volt battery. By carefully selecting the number of turns on the transformer, you should be able to make several different types of voltage converters from this circuit.