I am not sure of the power draw for the ejector system, but I am fairly confident that you could put together some solar panels with a battery to power the system. I don't know what the average monthly draw would be, but if you contact one of the manufacturers, I am sure they could let you know. With the aerobic system, the aerator runs constantly and the pump runs for a couple of minutes after every 100 gallons or so.
I have thought about hooking up two separate lines when I build my house with only the toilets going to the septic and everything else going to a gray water system that could be used for irrigation anywhere I want to put it. This would cut down MASSIVELY on the load that your septic system would have to deal with. Up front cost is probably around $1000 - $1500, but the decreased load on the septic system will help make that cost up by not having to pump out the tank as frequently. I am thinking of a 4 or 5 year payback if I put in a dual system. Send me a PM if you want to talk with me.
