Hi,

Manish originally the inverter was built ono the PIC18F452 and had loads of features like true synchronized changeover using MOSFET based static switches to perform like a pseudo online UPS. Actually it was an adaptation of my motor control system using 18F4331. However the BOM cost was high so it was scaled dowm to mimic other designs already based on 16F72. Uses a pseudo software PWM. (Utilizes the inbuilt unit in compare mode to generate int and fire mosfets). Half-Bridge driving and a half cycle boost PFC for charging control. Vertical-Horizontal current based lookup table to get precalculated points (16F series do not support harware multiply). Most of the credit goes to Mr. Pramod Sinha of Jetmark Systems Delhi cause my 16F skill sucks. We could not share the code as it is a commercial project and we are legally binded. For clarifications and solving issues this forum is a great place and people (far far better than myself, Perhaps) would surely help you out. Best of luck. Where are you located in Delhi, I drop in there almost every month and stay in A6 Paschim Vihar.