Solar Array Sizer

Solar panel

Preset

Wattage (W)

Vmp (V)

Imp (A)

Voc (V)

Isc (A)

Voc temp coef (%/°C)

Solar generator

Preset

MPPT 1

Max PV V (V)

Min start V (V)

Max PV A (A)

Max PV W (W)

Site & target

Record low temperature (°C)

°C°F

Used to adjust Voc upward for cold mornings. Use your site's record low.

Target wattage (W, optional)

If set, ranks configs by closeness to this target.

Allow over-current (clipping)

When on, configs that exceed the MPPT's max current are allowed with a warning; the controller clips current/power to its rated limit. Voltage limits are still strict.

MPPT 160V / 15A / 500W

Recommended

Config

2S × 2P

Panels

Total power

400 W

Effective (clipped)

400 W

String Vmp

37.2 V

Cold Voc

49.1 V

Total Isc

11.72 A

Clipped Isc

11.72 A

V headroom

18%

A headroom

22%

Show invalid

S×P	Panels	Watts	Vmp	Cold Voc	Isc	V hr	A hr	Status
2×2	4	400	37.2	49.1	11.72	18%	22%	Valid
1×2	2	200	18.6	24.6	11.72	59%	22%	Valid
2×1	2	200	37.2	49.1	5.86	18%	61%	Valid
1×1	1	100	18.6	24.6	5.86	59%	61%	Valid

Cost estimate

Per panel ($)

Generator ($)

Cabling ($)

Panels4 × $120 = $480

Generator$999

Cabling$80

Total$1559

$/W (STC)$3.90

Rough order-of-magnitude only. Excludes mounting, shipping, tax, and labor.