A load of that size really needs a regular telecom rectifier/charger. They are designed for exactly this application. If your load is 100 amps, the power supply needs to be probably 120 or 150 with current limiting so it can pull the load and charge the batts after an extended outage. Lately I have been using these: http://www.eltek.com/us/detail_products.epl?id=1233974&cat=24671&k1=&k2=&k3=&k4=&close=1
If you get the BC-2000 controller, you get a nice battery load test and telemetry option too. You can run the system just on batts for any specified amount of time and graph the discharge. Shows the life and health of the battery really quickly. On Apr 23, 2015 11:34 PM, "TJ Trout" <[email protected]> wrote: I have a dc load that I need to power using a switching ac to dc power supply but I also occasionally need to power the load from batteries, I was planning to put the load, power supply and battery clamps in parallel, is that a acceptable solution ? Can I power the load from battery and back feed DC into the supply without damaging it? Would there be a significant drain back into the supply? If this isn't ok, what's better solution? Diode ? SPDT switch ? The load is 50V 100A so that makes diodes and switches a challenge to find. ..
