The following series of UPS has both 120V and 208V versions in capacity sizes of 1000VA, 1500VA, 2000VA, and 3000VA:
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But here's the rub. In the 120V versions, they use the following plug sizes for the power cord:
1000VA -> NEMA 5-15P
1500VA -> NEMA 5-15P
2000VA -> NEMA 5-20P
3000VA -< NEMA L5-30P
No surprise there. However, the 208V versions seem oversized:
1000VA -> NEMA 6-15P 1500VA -> NEMA 6-15P 2000VA -> NEMA L6-20P