I'm working on an off-grid setup and getting a bit stuck on sizing the PV array and finding the appropriate MPPT. I have roof space for 18 panels, facing South @ 60deg angle, single surface (shading is not an issue) and want to maximize production in the winter, maybe even oversizing the array somewhat to compensate for the lack of sun, if this makes sense.
- MultiPlus-II 48/5000/70-50-GX
- 3x Pylontech US 3000C 72Ah 48V
- SmartSolar MPPT 250/100 Tr VE.Can
- 16x 360W-24V Mono - trying to find the optimal capacity
- backup diesel generator
1. How would it be optimal to wire the panels? The calculator suggests this MPPT in 3 series/6 parallel configuration, but the min. PV voltage @ max temp seems out of the ideal range (84.4V).
2. Would I benefit from using higher capacity solar panels, e.g. 450Wp, in terms of having more reserves during winter? If so, would I need to daisy chain an additional MPPT?
Any advice, suggestions, pointers appreciated.
Thanks in advance, cheers,