Recent content by tai625

How big is your sailboat, just curious? Tai

That is the definition of online UPS:) AC > DC then DC > AC…We call it double conversion. I am wondering if anyone has tapped into the AC > DC to charge the batteries? In theory, from a typical 3000VA UPS (2700W/0.9PF), we could get almost 60A @48v!!! No charger needed :) I think 120A BMS is...

24V * 100Ah = 2400 Wh or 2.4kWh or 2kWh usable. A very efficient normal size of refrigerator/freezer would take 1kWh per night. Depend on how long furnace is running, you should be ok. Tai

Wire from batteries to inverter: 1000W will need 80A @ 12V cont. so #4AWG?! I am using an 3kVA APC UPS as inverter @48v and my wires are #6AWG. Tai

In my city, both of them need permit…You can tell them that to start the generator, it is manual :-) Tai

Reliance is a nice one, I almost bought one from eBay $120, I think. What I like about the APC is the 2 back up sources and automatic transfer when the utility is out. And if generator run out, it would switch to UPS automatically or vice versa. Tai

Be careful, the item you would receive doesn’t come with the Generator input. Tai

Take a look at APC UTS-H on sale at B&H $350 delivered if you are in the USA. You can program each circuits the way you wanted. There are 2 backup power source (Gen+UPS), one for day, another for night, if you wish...