3kVA extended runtime online UPS with scalable external batteries

The Echo ECH3000RMi2UER is a 3000VA / 2700W true online double-conversion UPS designed by Uniti Power for critical rack infrastructure that needs more runtime than an internal-battery UPS can hold. It contains no internal batteries: backup comes from one to four EBM72VRM2U 72V battery modules, giving a typical 3.7 to 26.0 minutes at full load. The power module itself is 2U high, 428mm deep and weighs 9.3kg.

Separating the batteries from the UPS electronics lets runtime be sized around the application. A site can start with one battery module and add more as its autonomy requirement grows, without replacing the UPS. Meanwhile the online double-conversion design keeps the inverter supplying the load at all times, so connected equipment is protected from outages, unstable voltage and electrical noise, with a 0ms transfer when the mains fails.

Where the ECH3000RMi2UER is used

The ECH3000RMi2UER suits network and communications racks, security and CCTV, retail systems, distributed IT and edge sites, and small server rooms where the protected load needs both 3kVA of capacity and runtime beyond a few minutes.

How the extended runtime system works

The ECH3000RMi2UER uses a 72V DC battery system with a 4A charger. Uniti Power's EBM72VRM2U Echo 72V battery module is the 2U rack-mount module designed for this model. Each module has an extending port, so modules connect in a chain, with the last module's battery cable plugged into the UPS. The user manual states that the UPS can work with a maximum of four external battery cabinets. Recharge time depends on how much external battery capacity is connected.

Runtimes are typical values for new, fully charged batteries at 25°C, provided as a guide only. Actual runtime depends on battery age, temperature and the type of load.

Electrical performance

• Capacity: 3000VA / 2700W at a 0.9 output power factor.
• Output quality: pure sine wave, ±1% voltage regulation, 50 / 60Hz ±0.05% and under 2% THDv on linear loads.
• Input window: 90-275VAC ±5VAC and 40-70Hz ±0.5Hz, with an input power factor above 0.99, to keep battery use down during poor mains conditions.
• Efficiency: 91% in line mode and 87% in battery mode.
• Transfer times: 0ms inverter to battery, under 4ms to automatic bypass, and under 10ms between ECO and battery modes.
• Overload: 100-105% continuously, or 105-130% of rated load for 60 seconds.

Installation

The power module measures 439.8 x 88 x 428mm and is fitted with the supplied rack ears. Its input is an IEC C20 connection, and the user manual shows four IEC C13 outlets plus one IEC C20 outlet on the rear panel. Keep 200mm free behind the UPS for ventilation. Battery connection must follow the polarity and isolation steps in the user manual, and Uniti Power offers installation and commissioning for complete systems.

Monitoring and control

RS232, USB and an EPO / ROO dry-contact port come as standard, and the programmable LCD shows load, battery level, input and output values and alarms. For network monitoring, fit the optional UPNETG2S short network management card and manage the UPS through WinPower G2 and SPS G2, including multi-system shutdown.

Standards, warranty and support

The ECH3000RMi2UER is CE marked and IP20 rated, with noise under 50dB. The Echo user manual lists EMC to IEC 62040-2 Category C2 and safety to EN IEC 62040-1.

Registered Echo products in the UK carry 3 years on parts and 1 year on batteries. Terms for the EBM72VRM2U battery modules are on the warranty information page, and you can register your UPS once installed.

Echo ECH3000RMi2UER questions answered

Does the ECH3000RMi2UER have internal batteries?
No. The ECH3000RMi2UER is an external-battery model, so battery backup is provided by connected EBM72VRM2U modules.

How many battery modules can the ECH3000RMi2UER take?
Up to four. Runtimes are published for one, two, three and four EBM72VRM2U modules.

How long will the ECH3000RMi2UER run on battery?
Typically 3.7 minutes at full load with one EBM72VRM2U, rising to 26.0 minutes at full load and 124.5 minutes at 25% load with four.

What does ER mean on the ECH3000RMi2UER?
ER denotes the extended runtime version of the Echo 3kVA UPS, built without internal batteries so that runtime scales through external battery modules.

How do I buy the ECH3000RMi2UER?
Request a quote on this page, call 0845 561 0560, or find a Uniti Power partner near you.

Runtime figures are taken from the Echo Range Brochure (PDF). Full specifications are in the ECH3000RMi2UER datasheet (PDF) and the Echo 1-3kVA user manual (PDF).