Hi Lee, Yeah, I know it doesn't exactly 'sip' power, but we do have a lot of sun around here! :-)
I've measured the current, & with all the 'necessary' modules, it's a bit less than 500 ma. I think I might be able to improve on that a bit also. If this were a primary repeater, I'd do a bit more looking, but as it will be a 'backup' repeater, I plan on using another receiver (low power) which will have control over it. Most of the time, the micor portion of the system will be off. Thanks, Tim

