Runtime engineered independently of capacity

The M90LU is a scalable modular online double-conversion UPS designed for critical loads requiring very long battery run-times. It can be configured with fully redundant power modules — if one fails, the remaining modules smoothly take over the load — and the independent power modules are hot-swappable without risk to the critical load. By separating the UPS and battery system, the M90LU lets runtime be designed and expanded on its own, aligned to the application rather than constrained by an internal battery compartment.

Scale power and runtime separately

Unlike integrated-battery UPS, the M90LU keeps no internal batteries — runtime is delivered by external battery systems sized to the site. The platform supports Xtreme Power M90-BC and M90-BOS battery systems as well as third-party configurations, so capacity (power modules) and runtime (battery strings) scale independently. The result is finer runtime planning, simpler battery service, and infrastructure that can grow on either axis without replacing the UPS.

What the M90LU delivers

Capacities and module configuration

M90LU is offered in two module lines — 15 kW and 20 kW power modules — each scaling across three enclosure slots. Unity power factor means the kVA and kW ratings are equal. Runtime is configured separately through external M90-BC batteries.

The enclosure holds up to three power modules (up to 45 kW with 15 kW modules, up to 60 kW with 20 kW modules). N+1 protected capacity is one module below the fully populated rating; the 45 kW and 60 kW ratings are fully populated and non-redundant. Charge current scales with the populated module count (8 / 16 / 24 A).

M90-BC runtime by battery modules and load

Approximate runtime in minutes with external M90-BC battery modules (4 to 32, in up to eight strings of four) by system load. Because batteries are external, runtime scales well beyond internal-battery systems — up to several hours at lighter loads. A dash indicates that load is beyond the supported range for that battery configuration.

Runtimes are approximate and vary with battery age, temperature, and site conditions. Battery life is reduced above 30°C and capacity derates above 30°C and 5,200 ft. Contact Xtreme Power at (800) 582-4524 or sales@xpcc.com for runtime sizing and M90-BC / M90-BOS configuration.

The extended-runtime member of the M90U family

M90LU is the extended-runtime platform within the M90U family — the same modular UPS as the internal-battery M90U, configured for external batteries. It is deployed where runtime requirements exceed internal-battery capability, where centralized battery systems are preferred, or where power and runtime must scale independently. The compact M90C-6S sits below for smaller modular loads, and the M90U-80 / M90U-140 extend the family to higher capacities.

See the full M90U platform family.

M90LU vs the alternatives

See the lithium UPS guide for the VRLA-vs-lithium trade-off.

Replace legacy extended-runtime systems

M90LU is commonly deployed to replace legacy APC and Eaton UPS requiring extended runtime — systems needing longer ride-through than internal batteries allow, facilities transitioning to centralized battery architectures, infrastructure requiring scalable runtime and modular serviceability, and sites modernizing legacy UPS with limited runtime flexibility.

Where the M90LU is deployed

M90LU is deployed across infrastructure requiring extended runtime and scalable UPS architecture — data centers, telecom and network infrastructure, industrial systems, healthcare environments, and edge data center deployments.

Approvals and warranty

The M90LU carries UL-1778, cUL, FCC Class A, and RoHS, and is TAA compliant on select models — confirm TAA eligibility for the specific model and configuration when a regulated procurement requires it. The UPS is backed by a 2-year warranty (USA and Canada); external batteries carry their own (M90-BC / M90-BOS or third-party) terms.

M90LU specifications

Documents and related links