Your server room can't afford a 400V brownout at 6am on a Tuesday. The APC Easy UPS 3S 15 kVA sits between your mains and your critical load, converting power continuously so your gear never sees a blip. 15 kW of double-conversion online protection, 400V 3-phase in and out, 50 Hz synced to mains. Supplied without batteries — you pick the VRLA packs (E3SBT4, E3SBTH4, or E3SXR6) to match the runtime you actually need. Three free battery slots give you room to grow later. Dust filter and conformance-coated boards mean it'll sit happily in a dusty electrical room without throwing errors. Not rack-mountable — floor or wall mount. 60 dBA at full load, so it won't drown out your phone calls from the next room. Input voltage range 304 to 477 V covers the swings you get on a shared transformer
| brand | APC |
| model | Easy UPS 3S 15 kVA (E3SUPS15KHB) |
| type | Double conversion online UPS |
| rated_power_va | 15 kVA |
| rated_power_w | 15 kW |
| input_voltage | 400 V 3-phase (380 V / 415 V compatible) |
| output_voltage | 400 V 3-phase (380 V / 415 V compatible) |
| output_frequency | 50 Hz sync to mains / 60 Hz sync to mains |
| battery_type | VRLA, 240 V |
| battery_slots_free | 3 |
| compatible_batteries | E3SBT4, E3SBTH4, E3SXR6 |
| input_voltage_range | 304–477 V |
| input_power_factor_full_load | 0.99 |
| input_harmonic_distortion | < 3% at full load |
| output_harmonic_distortion | < 3% linear load |
| output_voltage_tolerance | +/- 1.5% |
| load_power_factor | 0.9 leading to 0.9 lagging |
| maximum_input_current | 28 A |
| maximum_short_circuit_current | 10 kA |
| operating_temperature | 0–40 °C |
| storage_temperature | -15–40 °C |
| humidity_operating | 0–95% non-condensing |
| acoustic_level | 60 dBA |
| heat_dissipation | 852 W |
| ip_rating | IP20 |
| mounting | Not rack mountable (floor or wall) |
| included | Dust filter, installation guide |
| compatible_spare_parts | LV429390, E3SOPT001, E3SOPT003 |
