The VeggieGen's Automatic Transfer Switch

It would be convenient for us to have an automatic transfer switch, so that when the VeggieGen is started, our system automatically switches from battery/inverter power, to generator power. When the generator shuts down, we go back to inverter power, without any hiccups. However, the Gen takes a few moments for the rpm's to settle down, and the frequency to get in spec.

We have developed an inexpensive automatic transfer switch that senses power coming from the generator, waits 60 seconds, then disconnects the inverter and connects the generator in less than 40 ms. A block diagram is below, and a parts list, parts, and finished units will be available.