M90S-12S vs RoseWater Energy HUB20
The Xtreme Power M90S-12S and the RoseWater Energy HUB20 are high-capacity power-protection systems for residential, commercial, and specialty applications. Both deliver premium protection, but the M90S-12S is a true modular online double-conversion UPS with scalable power and battery modules, whereas the HUB20 is a fixed-capacity, single-enclosure system that requires traditional rigging. The M90S-12S leads on scalable capacity, fully rated rectification, efficiency, voltage flexibility, and TAA compliance.
Where the M90S-12S leads
- Modular architecture scales 6–48 kW with power and battery modules, vs the HUB20’s fixed 20 kW.
- Fully rated rectifier supports full load without leaning on the batteries, vs the HUB20’s 9.6 kW rectifier.
- Higher efficiency — up to 98% (ECO) / about 93% online vs roughly 89% — for lower heat and cooling load.
- Casters and modular field assembly install without rigging; both 120/240 V and 120/208 V; UL, cUL, and TAA compliant.
High-capacity UPS, side by side
| Specification | Xtreme Power M90S-12S | RoseWater Energy HUB20 | Advantage |
|---|---|---|---|
| System architecture | True modular online UPS | Fixed-capacity integrated system | Modular growth and redundancy over time |
| Scalable capacity | 6–48 kW (6/12/18/24/30/36/42/48) | 20 kW fixed | Capacity and redundancy tailored as needs evolve |
| Rectifier rating | Fully rated for system load | 9.6 kW | Supports full load without relying on batteries |
| Universal slots | Yes — power or battery modules | No | Simpler upgrades and reconfiguration |
| Efficiency | Up to 98% (ECO) / about 93% online | About 89% (calculated) | Lower energy use, heat, and cooling demand |
| Dimensions (with batteries) | 23.6 x 36.0 x 79.1 in (about 5.9 sq ft) | 28.1 x 26.25 x 84 in (about 5.1 sq ft) | HUB20 footprint marginally smaller; M90S adds modular scalability |
| Voltage options | 120/240 V or 120/208 V (2P, N, G) | 120/240 V only | Supports both common split-phase voltages |
| Display & diagnostics | Chassis + module-level LCDs | Chassis-level LCD | Faster, more granular troubleshooting |
| Rigging & installation | Casters; modular field assembly | Rigging required | Easier transport, positioning, and installation |
| Certifications | UL, cUL, TAA compliant | UL, cUL (TAA varies) | Clear positioning for regulated markets |
| Warranty | 3 years (electronics & batteries) | 3-year onsite warranty | HUB20 includes onsite service; optional on the M90S |
M90S-12S figures are drawn from the published comparison content; the M90S-12S delivers unity power factor and is UL / cUL listed and TAA compliant, while the HUB20 is UL / cUL with TAA varying by configuration. The HUB20 efficiency figure is a calculated estimate, and its footprint is marginally smaller than the M90S-12S. The HUB20 includes onsite service in its standard warranty, which is optional on the M90S. Specifications are for planning and should be confirmed against current manufacturer documentation.
Choosing between them
Both target premium, high-capacity power protection. The M90S-12S leads on modular scalability (6–48 kW), fully rated rectification, efficiency, dual split-phase voltage options, module-level diagnostics, and TAA compliance; the HUB20 fits fixed 20 kW deployments standardized on the HUB platform, where its marginally smaller footprint and onsite-inclusive warranty are the draws and no modular expansion is planned.
Choose the M90S-12S if you need
- Scalable capacity from 6 to 48 kW within one platform
- True online double-conversion with modular redundancy
- Higher efficiency and reduced thermal load
- Both 120/240 V and 120/208 V split-phase options
- TAA-compliant equipment for regulated procurements
- Simpler transport and installation without heavy rigging
The HUB20 may fit if you need
- A fixed 20 kW system in an integrated enclosure
- A residential or specialty install standardized on the HUB platform
- Onsite service bundled in the warranty, with no planned modular expansion
Related comparisons
Planning a high-capacity or TAA-compliant modular UPS?
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