Aferiy P040 (Nomad400) vs Westinghouse iGen300s

What is the difference?

The Aferiy P040 (Nomad400) has 400 W of power, 800 W peak, a 256 Wh battery. The Westinghouse iGen300s has 300 W of power, 600 W peak, a 296 Wh battery.

The Aferiy P040 (Nomad400) weighs 9 lb, the Westinghouse iGen300s weighs 6 lb. The Westinghouse iGen300s is easier to carry.

The Aferiy P040 (Nomad400) has a 7-year warranty, the Westinghouse iGen300s has a 2-year warranty.

The Aferiy P040 (Nomad400) charges from a wall outlet to 100 % in 72 min, the Westinghouse iGen300s charges from a wall outlet to 100 % in 5 h. The Aferiy P040 (Nomad400) is ready again sooner.

Both have 120 V AC output.

Specs side by side

	Aferiy P040 (Nomad400)	Westinghouse iGen300s
Capacity (Wh)	256	296
Continuous (W)	400	300
Peak (W)	800	600
Solar input (W)	120	—
Chemistry	LiFePO4	—
Cycles	—	—
Expandable	—	—
Weight (lb)	9	6
Warranty (yr)	7	2
Fridge run time	4.8 h	5.6 h
CPAP run time	5.8 h	6.7 h
Wi-Fi router run time	16.9 h	19.5 h
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Specs as read from manufacturer pages on 2026-11-04 / 2026-10-26. Specs one maker does not list are left out of the comparison. Run times are for that appliance alone with a typical duty cycle, after inverter and depth-of-discharge losses. Sponsored links; we may earn a commission.

Common questions

Which has more capacity, Aferiy P040 (Nomad400) or Westinghouse iGen300s?

The Westinghouse iGen300s. More capacity: 296 Wh vs 256 Wh.

Which is lighter, Aferiy P040 (Nomad400) or Westinghouse iGen300s?

The Westinghouse iGen300s. Lighter: 6 lb vs 9 lb.

Which has the longer warranty, Aferiy P040 (Nomad400) or Westinghouse iGen300s?

The Aferiy P040 (Nomad400). Longer warranty: 7 years vs 2 years.

More comparisons

Compare other models → · All Aferiy models · All Westinghouse models