More Solar for "Us"
Ok, I went off.the deep end? Bought 3 used 37watt uni-solar panels and a blue sky 2000e controller for the hefty price of $400, They were being listed as 75w panels, they are not The tested open...
Forum Discussion
jrnymn7 wrote:
BFL,
Yes, that's what I'm wondering about... how much of that Isc can I expect to see in winter? Amp hour wise, I don't imagine I'll replace what I use for heat and fridge controls, although that was what I was hoping for. Hopefully I can do a trial run next week.
I think I'll be pretty good as far as V loss goes. The full 50' of 6ga cable will only be used when necessary, so usually only 20'.
Once I establish insolation for a given day, can I then calculate what to expect amp hour wise, or will that just come with experience?
There are many websites of the solar to expect when and where.
The basic thing is the "bell curve" of daylight per day as the sun rises and falls, and the time that takes.
That varies with Latitude and Date (time of year) as the sun goes higher and lower in Declination through the year. The Bell Curve daily has the amps vs time from sun-up to sun-down. The area under that curve is the AH you get (clear sky all day) Throw in some overcast or clouds for part of that time and that reduces your daily AH. Of course it hurts more if the overcast is mid-day instead of early or late day.
Every day is different and there is nothing you can do about it. Sometimes you get down to 50% and have to run the gen. You never know when that might be, so just play it as it lies.
