PlugIn Solar Guru
Plan my setupPlan

Cabins and Farms / Make the power

Solar panels for cabins and farms

Ground mounts are the farm default: easy to clean, aimed exactly south, and no roof to leak.

What matters

  • Off-grid inverters accept high-voltage strings: EG4 lists two MPPT inputs up to 480 V on the 6000XP, best between 120 and 385 V.
  • Wire panels in series to reach that window and keep cable runs efficient.
  • Leave room to add panels; winter sun is short.
  • Bifacial glass-glass panels also make power from light reflected onto their backs; the gain depends on the ground under them and how high they sit.
  • Our string math for a 6000XP: a ZNShine 440 W reaches about 43 V open-circuit at -20 C, so 11 in series stays under 480 V, and 9 fill one 4,000 W input. A Canadian Solar 415 W reaches about 54 V, so 8 in series.
  • Jumbo panels like the Canadian Solar 695 W (about 33 sq ft) need a mount rated for their size: IntegraRack's IR-30 stops at 32 sq ft, so dealers point to the IR-40.

Watch out for

  • Keep string voltage under the inverter's maximum on the coldest morning, when panel voltage rises.
  • Ground mounts need posts set below frost line; check your county.

Equipment we have researched

Not for sale through us yet. Specs are copied from the cited source on the date shown; nothing here is hands-on tested.

IntegraRack (model family)

IntegraRack IR-40FSA Ground Mount

Ground mount frame (one per panel)

Tilt
15 to 40 degrees in 2.5 degree steps
Wind / snow
70 to 160 mph, 100 psf (panels up to 24 sq ft); 65 psf (up to 32 sq ft)
Not yet available

Keep going

Sources