Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Motorhome Build Thread
#31
Intended solar array : 8x 230w , VOC 36v VMP 30v. IMP 7.67A. Then 4x 230w (same panels) as an auxiliary booster setup used as and when needed or just in play when I'm at the truck and the sun is blazing. So 12 in total for calculation purposes.

Power demand for the inverter is approx 1800w-2200w variable daytime using AC unit.

Intended battery build will be 24v (200Ah cells if I can afford them at purchase). Looking at using the Victron Multiplus Inverter/Charger 24/3000/70-50 unit.

Two MPPT SCC's, one for the 8 roof mounted ones and one for the 4 auxiliary panels. Could anyone do a quick math summary on this intended path....????
Reply
#32
(10-28-2020, 09:46 AM)Mezbatt Wrote: Intended solar array : 8x 230w , VOC 36v VMP 30v. IMP 7.67A. Then 4x 230w (same panels) as an auxiliary booster setup used as and when needed or just in play when I'm at the truck and the sun is blazing. So 12 in total for calculation purposes.
.........
Two MPPT SCC's, one for the 8 roof mounted ones and one for the 4 auxiliary panels. Could anyone do a quick math summary on this intended path....????

The calculations would be the same as above in #27.
Vmp & Isc numbers just posted are STC, you need to use the NOCT numbers instead.
So 230 x 12 x 0.80 = approx 2,200W
2200 x 0.95 / 24V = 87A
If only 8 panels in use 230 x 8 x 0.80 = approx 1472W, ~58A etc

Even though you could get one larger & one smaller MPPT, having two the same (sized for the 8 panels) could give you redundancy if you wanted
Running off solar, DIY & electronics fan :-)
Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)