Want to install solar, questions
We recently got our new 2017 Nexus Ghost and I had it pre wired for solar. Nexus provided (in a box) a Zamp 30 amp Digital Controller with the pre wire. My question is how many 100watt paneles well...
Forum Discussion
Down South in summer, sun is so high flat panels can be close to max.
"roof panels have one downside for most uses. the optimum tilt angle for getting rated power needs to be about the latitude your at plus solar declination. That means something around 45-60 degrees tilt. depending on location and time of year. "
Actually that's for winter up here. In summer,
Lat MINUS Dec = Tilt in northern hemisphere with north Dec
Since tilt (up from flat) = Zenith distance (90- sun's altitude above horizon) and ZD plus Dec = Lat at high noon, sun bearing S.
EG, 21 June Dec 23N at 49N---- Alt 64, so ZD is 26. 26 + 23 = 49
Same day down at 32N, tilt is 32-23 = 9 (almost flat)
Optimum tilt for a panel fixed pointing south is less than the noon angle so it can get more light in the shoulder hours. See macslab.
If you have a tilted panel on a twirler always pointing at the sun, however, you want it tilted higher in the shoulder hours than at noon which is your lowest tilt.
"roof panels have one downside for most uses. the optimum tilt angle for getting rated power needs to be about the latitude your at plus solar declination. That means something around 45-60 degrees tilt. depending on location and time of year. "
Actually that's for winter up here. In summer,
Lat MINUS Dec = Tilt in northern hemisphere with north Dec
Since tilt (up from flat) = Zenith distance (90- sun's altitude above horizon) and ZD plus Dec = Lat at high noon, sun bearing S.
EG, 21 June Dec 23N at 49N---- Alt 64, so ZD is 26. 26 + 23 = 49
Same day down at 32N, tilt is 32-23 = 9 (almost flat)
Optimum tilt for a panel fixed pointing south is less than the noon angle so it can get more light in the shoulder hours. See macslab.
If you have a tilted panel on a twirler always pointing at the sun, however, you want it tilted higher in the shoulder hours than at noon which is your lowest tilt.
