Opinions about HF 45 Watt solar panels

Posted by amdx on July 1, 2010, 5:11 pm

Hi guys,
I see Harbor freight has their 45 Watt solar panels on sale.
Think The would last 20 years on the roof in Florida.
Thinking about using it to drive solar water heater pump.

http://www.harborfreight.com/45-watt-solar-panel-kit-90599.html?utm_source=direct&utm_medium=email&utm_campaign&10B

--
MikeK

Posted by Martin Riddle on July 1, 2010, 7:14 pm

http://www.harborfreight.com/45-watt-solar-panel-kit-90599.html?utm_source=direct&utm_medium=email&utm_campaign&10B

Suns' got a great sale right now on 100v Dupont thin film panels.
http://sunelec.com/
And $1.80/w for 12v Polycrystalline panels by SUN. (ETL , CE)

Cheapest I've seen so far.

Cheers

Posted by amdx on July 1, 2010, 7:33 pm

--
MikeK

http://www.harborfreight.com/45-watt-solar-panel-kit-90599.html?utm_source=direct&utm_medium=email&utm_campaign&10B

   Ok, educate me,
DuPont DA100-A1 100 Watt,   1.30 Imp,   76.96   Vmp   $ 120.00
What is the 1.30 Imp?
The Vmp?
                    MikeK

Posted by vaughn on July 1, 2010, 8:38 pm

I am guessing that "mp" means "Maximum Power Point". If you multiply 76.96
volts times 1.3 amps you get 100 watts. So that is a high voltage panel;
probably not what you are looking for!

Vaughn

Posted by Martin Riddle on July 1, 2010, 9:40 pm

Yup, for 600v strings. But theres 12v panels as well, under $2/w

Cheers