I'll break this into separate responses for ease...so, to understand this posting correctly, because I live so close to the 45th parallel, 1) solar heating is really not an asset to me during the winter months and panels wouldn't be worth my time or energy...even if I were to use an "eco-friendly" substitute instead of water in my system as a heat exchanger? 2) Solar panels not the way to go to try to offset my electric bill??? I do understand that they are a maintenance issue and that may play a small factor as my mom progresses with her dementia, but the less dependence I have on the crooks I have at our power company, the better. Since posting the original post, I received my power bill. This January, they are trying to soak me for over 1000kWh of usage!!! <dirty mean words edited out> Let's just say that the most I have ever used since moving up here in 2009 was 595 kWh in a month (hard winter with many days that month in the -20F's outside with stiff winds out of the north and west). The oaks provide shade in the summer, yes, but to collect the energy would be a trade I would be willing to sacrifice. I cannot speak for my neighbors though. I have a double city lot. The lot to my west is shaded in the front by a pine (50-60 ft) and a mid-sized maple (30 ft). The lot to my east has oaks about the same size as mine and theirs blocks my telescope views to the northeast. The field to my southeast-south-southwest is overgrown with a small tree line at the road (20 ft or less). I see the point about the light angle and think that if this project were feasible enough, I'd spring for motorized units to track as far as I could. 3) If I were to monitor parameters, for a period of time, which solar parameters would I monitor (bear in mind I am an avid amateur astronomer with a vast knowledge of solar websites and also a rookie weather spotter too). Sorry for the long post.