solar upgrade
On my RV roof I presently have 2 Kyocera 135 W panels, flat mounted, hooked in series, feeding to my Blue Sky Solar Boost 3024iL charge controller. I want to add more panels to my array. The simpl...
Forum Discussion
Starburst2 wrote:HiTech wrote:
Does your controller find multiple power points? With those voltage specs it looks like the new panel would have to parallel to the other 2 that are in series to stay in spec for what the controller can handle.
The second panel you are looking at has a closer Vmpp to 2x your existing panels. Closer MPPs means the system will make better power across the different spec panels because each can run closer to its optimum voltage when run together.
Jim
Hi Tech, why would l need to run them in series? With the two 135'sin series giving me a nominal 24 VDC plus a 245Watt additional panel (nominal 24 VDC), hooked in series would give me 48 vdc, NO.?
Lloyd
I believe you need to keep the Voc total for the solar string under the controller limit. As the PWM switches on and off the input circuitry is subjected to the open circuit voltage, not just the voltage under load. In addition in cold weather and with cloud effect, panels will actually put out a higher voltage than Voc.
Jim
