Reef Angel Forum

Hi all, in the plans to make a backup power supply as per this how to.

http://atj.net.au/marineaquaria/backup_power.html

Am looking to have my RA+ with one relay box running off of it, plus power heads and return and a modem and maybe one other small consumer, like the USB extension. Got an idea how many watts I need for the pumps, but no idea how much for the RA. I can't imagine its much, except maybe the relay box uses more power than I expect. Tossing up between a 300 and 600w inverter. Was going to just get a 600w, but if I'm not over 300 I don't see the point as it will be less efficient. Anyone got one of those watts measuring thingies and knows exactly how much the RA uses?

Cheers
Sabo

The head unit and relay box alone doesn't consume much. I don't think you can even detect how much on those wattmeters. It's neglegible.
It's what you connect to the relay box is what you need to worry about.

That's what I was thinking. Thanks, think I'll go with a 300w inverter.