Grades compared

Every part comes in grades. Worn and improvised ones get you started; better grades make more, waste less and last longer.

Solar arrays

	Salvaged Solar Array	Solar Array	Monocrystalline Array
Rated, full sun	351 W	574 W	1161 W
Modules	2	2	3
Cell efficiency	13.5%	17.5%	21.5%
Dust builds up	1.6×	1×	0.7×
Wears	1.7×	1×	0.5×
Heat loss per °C	0.50%	0.40%	0.29%
Build	Electrical 2	Electrical 4, Metalworking 2	Electrical 7, Metalworking 3

Roof panels come in the same three grades (Electrical 2; Electrical 4 and Metalworking 1; Electrical 7 and Metalworking 2).

Battery racks

	Improvised Battery Crate	Battery Bank	Sealed Battery Cabinet
Bays (wall version)	3 (2)	6 (3)	8 (4)
Stores per battery	560 Wh	720 Wh	920 Wh
Round trip	72%	86%	94%
Damage floor	30%	15%	8%
Left at -10 C	42%	55%	74%
Build	Electrical 1, Carpentry 2	Electrical 3, Metalworking 3	Electrical 6, Metalworking 4

Charge controllers

	Charge Controller	MPPT Charge Controller
Efficiency	93%	96.5%
Extra harvest from panels	none	+10%
Build	Electrical 3	Electrical 8

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