KOSS · 2 models
KOSS UPS battery backups
Every KOSS UPS certified under ENERGY STAR and listed for the US market, largest first. Each model page has the full certified specs and comparable machines from other makers.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| Maxtron II MX-10KR | 10 kVA / 10 kW | Double Conversion | 94.8% | 10 min |
| Axcell AX-3KWR | 3,000 VA / 2,700 W | Double Conversion | 92.0% | 12 min |
Source: ENERGY STAR certification data, US EPA. Data build 2026-09-29. Brand names are as the maker certified them, with obvious variant spellings merged.