I'm for sure i'd need a 2nd charge controller, but i gotta do some drawings to see how i can arrange the panels on my roof..and still use my same home made racks on the roof,
I'd attach a picture, but i can't figure out yet how to do so on here.
my old panels are probably 15 yrs old, or so,, i bought them used.. but my calculations and quick test the other day. i tested all 3 strings. they were
they were consistent with each other. seems still 100% good, i measured open circuit voltage and short circuit current. I know they can't still be 100%
The short circuit current was a bit low. but still very good. they are Photowatt brand.
M-PW1000 24V ( PW1000 24V ) SIZE bout 26 1/2 X 52 3/8 and bout an inch thick.
web page >>------> http://www.posharp.com/photovoltaic/database.aspx?ctype=10&cid=a4c61fe1-5065-4d3b-bb6d-252580ba4dc3
Mine have the M in the model, But on the page the M is not shown, but others with same spec show.
I did some load test the otherday. I have 3 strings of 8 in series
OCV ISC calculated watts
string 1- 287v 2.95 846
string 2- 277v 2.96 819 -------------------------------->>> each string is 8 panels in series @ 24V
string 3- 289v 2.84 820
--------------
2485 watts can this be right ?
I'd attach a picture, but i can't figure out yet how to do so on here.
my old panels are probably 15 yrs old, or so,, i bought them used.. but my calculations and quick test the other day. i tested all 3 strings. they were
they were consistent with each other. seems still 100% good, i measured open circuit voltage and short circuit current. I know they can't still be 100%
The short circuit current was a bit low. but still very good. they are Photowatt brand.
M-PW1000 24V ( PW1000 24V ) SIZE bout 26 1/2 X 52 3/8 and bout an inch thick.
web page >>------> http://www.posharp.com/photovoltaic/database.aspx?ctype=10&cid=a4c61fe1-5065-4d3b-bb6d-252580ba4dc3
Mine have the M in the model, But on the page the M is not shown, but others with same spec show.
I did some load test the otherday. I have 3 strings of 8 in series
OCV ISC calculated watts
string 1- 287v 2.95 846
string 2- 277v 2.96 819 -------------------------------->>> each string is 8 panels in series @ 24V
string 3- 289v 2.84 820
--------------
2485 watts can this be right ?