De-rating the 230w
I hauled the 230w Schottpoly out to see if I could tone down the voltage by turning it or partially shading it. I found that to get the Voc down to 32v by turning it, I had to turn it 90 degrees to...
Forum Discussion
Golden_HVAC wrote:
$50 MPPT controller. http://www.aliexpress.com/item/LCD-30A-MPPT-Solar-Panel-Regulator-Charge-Controller-12V-24V-380W-760W-With-USB/959502350.html it is the first one that came up when I looked up MPPT controller. You can look around the site, it offers many manufactures and sales places. .
Fred.
That is a "fake MPPT" same as the one that lady posted about recently that she got. It is a good PWM in the Solar30 family but you can get a Solar30 for about $34
Thanks for the tip anyway, but you missed that I already have a decent controller for my 230w panel. Eco-Worthy 20a MPPT which is a real MPPT not a fake, so it costs $102.
The prices of buck converters go up with intake voltage and amps. That component alone in a "real" MPPT controller that can run a 230w panel is nearly the cost of the whole Eco-Worthy 20 amper. IMO that means you can't get a real MPPT controller for much under $100.
So if you see one for under $50 it is probably one of those "fake MPPT" jobs.
