solar budget of 2700.00 Canadian
Hi all, I'm going to beef up my solar system. The budget is $2700.00 including installation costs. I'm considering these because I will be able to pick them up from Calgary and save the (conside...
Forum Discussion
I have decided to spend PT's money "my way"
He is looking at 4 24s and MPPT, which will get him 60a approx.
Comparing this to getting 60a with PWM and looking at total panel square footage and costs.
I get my panel sizes and cost here for an example (panel sizes are many-shaped depending on some whim it seems for length and width proportions)
http://www.windturbine.ca/sun_panels.html
MPPT- using 230w panels above, 4 would be 70.2 square feet
PWM- using 120w panels above, 8 would be 77.9 square feet
Each will do 60a and cost about the same at
8 x 129 = $1,032
4 x $248= $ 992
Controller amps sizing with 20% margin over expected amps (Isc for the PWM case) means eg, four 20a controllers for the eight 120s in pairs, all controllers then in parallel on the batteries (never mind, this is just for a costing)--at $39 each that is $156 for controllers
How much for an MPPT controller that can handle 60a expected plus 20%?
Yipes!
So it is
-$1,032 plus $156 = $1,188, vs
- $992 plus YIPES = ??? $1,500 ???
So for the same amps, but to save 8 square feet of roof (4 x2?)
It will cost another ?? $300 ?? Doesn't seem way too bad, I don't know.
Now we have at least another $1,200 in the budget. Run do not walk, and get the dad-blamed Honda 2000 and stop fooling around I say!!! :)
He is looking at 4 24s and MPPT, which will get him 60a approx.
Comparing this to getting 60a with PWM and looking at total panel square footage and costs.
I get my panel sizes and cost here for an example (panel sizes are many-shaped depending on some whim it seems for length and width proportions)
http://www.windturbine.ca/sun_panels.html
MPPT- using 230w panels above, 4 would be 70.2 square feet
PWM- using 120w panels above, 8 would be 77.9 square feet
Each will do 60a and cost about the same at
8 x 129 = $1,032
4 x $248= $ 992
Controller amps sizing with 20% margin over expected amps (Isc for the PWM case) means eg, four 20a controllers for the eight 120s in pairs, all controllers then in parallel on the batteries (never mind, this is just for a costing)--at $39 each that is $156 for controllers
How much for an MPPT controller that can handle 60a expected plus 20%?
Yipes!
So it is
-$1,032 plus $156 = $1,188, vs
- $992 plus YIPES = ??? $1,500 ???
So for the same amps, but to save 8 square feet of roof (4 x2?)
It will cost another ?? $300 ?? Doesn't seem way too bad, I don't know.
Now we have at least another $1,200 in the budget. Run do not walk, and get the dad-blamed Honda 2000 and stop fooling around I say!!! :)
