Hello sir, We are in the Renewable Energy Field since 10 years and have developed Advanced & robust Charge Controllers for Solar Power packs(upto 120V,100amps) many such controllers are working successfully since 5 years. Many of my designs are published in electronics magazines in South Asia like "Electronics For You", "EDN- Asia" etc. I can Design what you are looking for. Will give you full Schematics, parts list,Source code, Hex file, Simulation file. please check the Project message board for the pictures of charge controller