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Starburst2's avatar
Starburst2
Explorer
May 06, 2013

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 simplest seemed to me to be to add a Kyocera 215 W panel or a 245 W panel but I do not want to owerpower my charge controller.
The two 135 W panels have the following specs: Vmp 17.7 , Imp 7.9 A, Voc 22.1, Isc 8.7A
The 215 W panel has the following specs: Vmp26.6, Imp 8.1A, Voc 33.2, Isc 8.8 A.
The 245 W panel has the following specs: Vmp 29.8, Imp 8.2 A, Voc 36.9, Isc 8.9 A.

The Charge Controller specs are: Output Current Rating 30A/40A, the Nominal Battery Voltage is 12/24 VDC, and the PV input max is 57VDC.

Since the two 135 Watt panels are hooked in series I am not sure how that affects the load on the charge controller.
Can someone who understands all this give me some guidance as to what maximum size panel I can add without exceeding the capacity of the controller?
Thanks for your feedback folks.
Regards,
Lloyd
  • Thanks smkettner. I thought about 2 more 135's or 140' s but have not graphed out my roof to see if I can get that much area without running in to partial shading from the AC's or the vent covers.. Would you still recommend the two 140's if partial shading would detrimentally affect one of the two?
    Lloyd
    .