I need complete software and hardware solution. I need UPS running on 12 volt battery with 20A charging current. It must be based on H-Bridge toplogy with high frequency transformer. Should have input output short circuit protection, overvoltage and undervoltage protection, overload protection, MOSFET protection. Status and data should have two options on PCB, LED or LCD(most common available). I need it to be microcontroller based, AVR/PIC with minimum component. Should not be SMD. PCB should be like module style. Motherboard, MOSFET board, Charger board, etc. All components should be readily available and low cost. Programming with complete detail and PCB 2 layer. It should be like a Kit. Power range 1200 VA. I hope I cleared the idea.