I know nothing about brooders but do know a little about off-grid power, because we outfitted a WAY off-grid cabin for very comfortable living. Somebody wrote that solar is not a good fit for heating, and they're absolutely right. You'd have to have a gigantic battery bank to run most any type of heat source, and batteries cost as much as (or more than) solar panels. Electric heat consumes A LOT of electricity. Solar is excellent for running things like lighting and small dc motors (like an RV water pump), though, because the demand is not so high.
Wind power has the capacity to generate more energy than solar, but again if you want to operate high energy demand items you're going to have to have a giant battery bank.
Hydro power can be great if you have access (I've always been intrigued by ram pumps), but again, the battery problem would come into play unless your electric needs were situated close to the water.
You can also do what we did many times for recharging a battery (which we used only for lighting and a small dc water pump), which is to run a generator and hook it to a battery charger. We also had solar panels but unless you have lots of them it can take (what seems forever) to recharge your battery(ies).
Another thing about batteries is that they have to be maintained, they definitely are not just plug-in and walk away.
Like I said, we used batteries to run lights, dc ceiling fan and water pump, and propane to heat the cabin and cook with. We also used propane for heating water, although if one takes care to build the proper setup then solar water heating would be quite practical.
I would HIGHLY recommend you read these
http://www.marxrv.com/12volt/12volt.htm ,
http://otherpower.com/, and
http://www.amplepower.com/ (AmplePower's cd is especially worth having if you're at all serious about off-grid power). You might also google masonry stoves for heating (a masonry stove is something I want REALLY bad). And for solar supplies (and info) we found Kansas Windpower
http://www.kansaswindpower.net/ to be helpful. They have a very useful catalog, and you can always call them with questions, though be advised they might be a little slow on phone calls because they are very busy!