Pure Sine Wave UPS Battery Backups

3 pure sine wave UPS battery backups from APC, CyberPower, Goldenmate and more. Prices run $471 to $520.

APCSpec score 7.8

500 VA, 400 Watts, rack, 4 Outlets

+500VA capacity suits small rack loads

+Lithium-ion battery for longer service life

+Pure sine wave output

$470.99-15%List: ~~$556.99~~

as of 11/04/2026 05:06 PST - Details

APCSpec score 8.2

500 VA, 400 Watts, rack, Line interactive

+500VA capacity suits small rack loads

+Lithium-ion battery for longer service life

+Pure sine wave output

−Line-interactive topology, not double-conversion online

$520.29

as of 11/04/2026 05:06 PST - Details

APCSpec score 7.9

500 VA, 300 Watts, rack

+500VA capacity suits small rack loads

+Pure sine wave output

+1U rackmount form factor saves rack space

No price recorded yet.

Compare specs

VA	Watts	Form	Design	Outlets	Spec score	Price
500	400	rack		4	7.8	$470.99 as of 11/04/2026 05:06 PST - Details
500	400	rack	Line interactive	4	8.2	$520.29 as of 11/04/2026 05:06 PST - Details
500	300	rack			7.9	No current price

Spec scores, pros and cons, and prices are explained in the How it works section of the About page.