Topology
Double conversion or line-interactive: what three-phase models actually use
A double-conversion (online) UPS turns incoming AC into DC and back into AC all the time, so the load is always fed by the inverter; a line-interactive UPS feeds the load from the utility through a regulator and switches to its inverter only when the supply fails. Every current three-phase family in the table below is double conversion; what separates them is the high-efficiency mode each adds and the efficiency each manufacturer quotes.
Topology and published efficiency by model
| Model | Topology | Efficiency | Status | Source |
|---|---|---|---|---|
| APC Galaxy VS GVSUPS20KFS (20 kW, 208 V) and GVSUPS100KGS (100 kW, 480 V) | Double conversion; eConversion mode | Up to 99% in eConversion mode, the factory default on the Galaxy V-Series since 2022 | Current | Schneider Electric Canada, GVSUPS20KFS; Schneider Electric Canada, Galaxy VS range |
| APC Galaxy VX GVX500K750HS (500 kVA scalable to 750 kVA, 400 V) | Not stated | Up to 99% in eConversion mode | Current | Schneider Electric Canada, Galaxy VX range |
| APC Galaxy VL GVL200K500DS (200 kW scalable to 500 kW, 400/480 V) | Not stated | Up to 99% in eConversion mode | Current | Schneider Electric Canada, Galaxy VL 200 scalable to 500 kW (GVL200K500DS) |
| APC Easy UPS 3S E3SUPS20KFBS (20 kVA, 208 V, internal batteries) | Double conversion online | Not stated | Current | Schneider Electric Canada, E3SUPS20KFBS |
| APC Easy UPS 3M E3MUPS120KHS (120 kVA, 400 V) | Double conversion online | Not stated | Current | Schneider Electric, E3MUPS120KHS |
| APC Symmetra PX SY40K40F (40 kW N+1, 208 V) | Double conversion online | Not stated | Partly discontinued: December 31, 2025 (150 kW scalable to 250 kW model) | Schneider Electric Canada, SY40K40F |
| Eaton 93PM 93PM 208V (North America) | Double conversion with optional Energy Saver System (ESS) | Up to 97% double conversion, up to 99% ESS | Current | Eaton, 93PM 208V UPS page |
| Eaton 93PS 93PS, 8 to 40 kW | Online | 96% | Current | Eaton, 91PS and 93PS UPS page |
| Eaton 9355 9355, 10 to 30 kVA | Not stated | 91% typical | Current | Eaton, 9355 UPS page |
| Eaton Power Xpert 9395P Power Xpert 9395P, 200 to 1,200 kVA | Not stated | Up to 97% (480 V) or 96% (600 V, 400 V) double conversion; 99% ESS | Current | Eaton, Power Xpert 9395P page |
| Eaton 9395XC 9395XC, 1,125 to 2,250 kW, 480 V 3-wire | Not stated | Up to 97.5% double conversion (480 V); 99% ESS | Current | Eaton, 9395XC UPS page |
| Eaton 9395XR 9395XR, 1,500 kW | Not stated | Above 97% double conversion, up to 99% ESS | Current | Eaton, 9395XR UPS page |
| Vertiv Liebert APM2 Liebert APM2 UL, 208 V (data sheet SL-71300) | Double conversion, transformer-free | 97.5% double conversion, 98.8% Dynamic Online, 99% ECO | Current | Vertiv Canada, Liebert APM2 UL UPS 208V; Vertiv, Liebert APM2 data sheet SL-71300 |
| Vertiv Liebert EXL S1 Liebert EXL S1 (brochure for 625 to 800 kVA) | Double conversion; Dynamic Online mode | Up to 99% in Dynamic Online | Current | Vertiv, Liebert EXL S1 page |
| Vertiv Liebert EXM2 | Not stated | Up to 98.8% in Dynamic Online mode | Current | Vertiv, Liebert EXM2 brochure |
| Vertiv Liebert ITA2 Liebert ITA2 3-phase, 5 to 40 kVA, 208 V | Online, three-phase (3:3) | Above 93% dual conversion, 99% eco mode | Current | Vertiv, Liebert ITA2 3-phase UPS page |
| Vertiv Trinergy (newer range) Vertiv Trinergy, the newer range that follows the Trinergy Cube (brochure SL-71331) | Transformer-free, full IGBT three-level double conversion | Up to 99% in power-conditioning mode | Partly discontinued | Vertiv, Trinergy UPS brochure SL-71331; Vertiv Canada, Liebert Trinergy Cube [Pre-2024 Legacy Models] |
| Toshiba G9000 G9000, 100 to 1,050 kVA | Double-conversion VFI | Up to 97% at 50 to 100% load, over 94% down to 20% | Current | Toshiba International, G9000 series |
| Mitsubishi Electric 9900B 9900B, 300, 500 and 750 kVA at 480 V | True online double conversion, IGBT three-level | 97% double conversion | Current | Mitsubishi Electric, 9900B UPS |
| Mitsubishi Electric 9900AEGIS 9900AEGIS, 80 to 225 kVA at 480 V | True online double conversion | Up to 97% | Current | Mitsubishi Electric, 9900AEGIS UPS |
| ABB TLE Series ABB TLE Series 40-150 kW and 160-1000 kW UL | Double conversion (premium protection mode), with eco mode and eBoost | Eco mode up to 98.9% (40-150 kW); up to 99% eBoost (160-1000 kW) | Current | ABB US, TLE Series 40-150 kW; ABB US, TLE Series 160-1000 kW |
| ABB DPA 250 S4 DPA 250 S4 | Online double conversion | 97.6% for the UPS module | Current | ABB, DPA 250 S4 |
| XPC M90U-80 M90U-80, 15 to 80 kW at 208/120 V | Modular online double conversion | Up to 94% online, up to 98% ECO | Current | XPC, M90U-80 |
Sources, checked October 3, 2026: values as each manufacturer publishes them for the model shown; “Not stated” means the page we read does not give the value.
Five names for the high-efficiency mode
Each manufacturer names its high-efficiency mode differently: eConversion at Schneider (up to 99% on the Galaxy V-Series, where it is the factory default), Energy Saver System or ESS at Eaton (up to 99% on the 93PM and the 9395 family), Dynamic Online at Vertiv (up to 99% on the Liebert EXL S1 and 98.8% on the APM2), ECO at Vertiv, Delta and XPC, and eBoost at ABB (up to 99% on the TLE 160-1000 kW). Vertiv quotes a 0 ms transfer back to the inverter from Dynamic Online on the EXL S1.
What two points of efficiency are worth
At 500 kW of load, 97% efficiency means about 15.5 kW of losses and 99% about 5 kW: roughly 10 kW less heat to remove, around the clock. On smaller units the gap between modes is wider: Vertiv quotes more than 93% in double conversion and 99% in eco mode for the Liebert ITA2, and XPC up to 94% online and up to 98% ECO for the M90U-80.
Where line-interactive still appears
Line-interactive UPS are mostly small single-phase rack and tower units. None of the three-phase families tracked on this site is line-interactive, so a three-phase quote that lists one deserves a second look at the topology.
Both topologies are listed among the UPS systems online, and UPS maintenance and repair across Canada covers either kind once it is installed.
Frequently asked questions
Is the Eaton 93PM double conversion?
Yes. Eaton lists the 93PM as double conversion with an optional Energy Saver System, up to 97% in double conversion and up to 99% in ESS.
What is eConversion on the APC Galaxy VS?
Schneider's high-efficiency mode for the Galaxy V-Series, quoted at up to 99% and set as the factory default.
What is Vertiv Dynamic Online mode?
Vertiv's high-efficiency mode: up to 99% on the Liebert EXL S1, with a 0 ms transfer back to the inverter, and 98.8% on the Liebert APM2.
Are there line-interactive three-phase UPS?
None of the current three-phase families we track is line-interactive; every one is double conversion.
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