1.5kVA true online UPS for critical IT and infrastructure

The Symphony SPY1500RMi2U is a 1.5kVA single-phase, online double-conversion UPS designed by Uniti Power for servers, network and communications equipment, security systems and other critical 230V loads. It delivers the full 1500W from its 1500VA rating, moves to battery with no break in supply, and fits 2U of a 19-inch rack or stands as a tower.

Because the inverter powers the load all the time, connected equipment is protected from power cuts, brownouts, surges, frequency drift and electrical noise, rather than only being switched over when the mains fails. The output is held within ±1% of nominal voltage, giving sensitive electronics clean, stable power in one compact unit that suits both cabinet and floor-standing installations.

Where the SPY1500RMi2U is used

Typical applications include small server rooms and comms cabinets, network switches and routers, telecoms, healthcare systems, industrial control, CCTV, door entry and point-of-sale equipment.

How true online double conversion protects your equipment

• 0ms transfer to battery: there is no gap in the output when the mains fails.
• Tight output regulation: ±1% voltage accuracy and under 1% THDv on linear loads.
• Wide input window: 160-300V at full load (down to 110V with derating), so the UPS rides through common voltage dips without drawing on its batteries.
• Clean input: input power factor above 0.99 and THDi below 5%, presenting a clean, efficient load to the supply.
• ECO mode: up to 97% efficiency where energy saving is the priority, with a 10ms transfer back to the inverter.
• Frequency converter mode: 50Hz / 60Hz conversion (CVCF) at up to 60% load.

Runtime and battery expansion

Three internal 12V 9Ah batteries (36V DC) give a typical 3.3 minutes at the full 1500W load and 8.7 minutes at 750W. For longer outages, up to four EBM3618RT2U external battery modules can be added, each in its own 2U rack/tower case.

The built-in 1.5A charger returns the internal batteries to 90% in around 3 hours. The Run Time tab gives load-by-load estimates for each configuration.

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.

Rack or tower installation

At 438 x 445 x 86.5mm, the SPY1500RMi2U takes 2U in a standard 19-inch cabinet. Rack ears and tower feet are supplied, and the optional SPYRAIL1-3 rail kit supports the unit in the rack. The dot-matrix LCD rotates to suit either orientation.

Eight IEC C13 outlets are arranged in two groups of four. One group is programmable, so non-critical equipment can be switched off during an outage to keep the most important loads running for longer.

Monitoring, communications and safe shutdown

USB (HID), RS232, a programmable dry input and output, and an emergency power off (EPO) input are fitted as standard. The intelligent slot accepts an optional network management card, Modbus card or AS400 dry-contact card, and an optional WLAN module is available. WinPower G2 monitoring software provides status, alarms and controlled shutdown of connected systems.

Standards, warranty and support

The SPY1500RMi2U is CE marked and built to IEC/EN 62040, the international standard for UPS systems, with Category C2 conducted and radiated emissions and immunity tested to IEC/EN 61000-4-2, -4-3, -4-4 and -4-5.

Registered Symphony products in the UK carry a 6-year warranty on the UPS electronics and 2 years on batteries and accessories, from the original date of purchase. Installation and commissioning is recommended but is not a condition of the warranty. See warranty information for full terms, and register your UPS once it is installed.

What's in the box

SPY1500RMi2U UPS, input power cable, 1 x 10A output cable, USB cable, rack ears, tower feet and user manual. An RS232 cable and the SPYRAIL1-3 rail kit are available separately.

Symphony SPY1500RMi2U questions answered

Is the Symphony SPY1500RMi2U a true online UPS?
Yes. It is an online double-conversion UPS: the inverter supplies the load continuously and the transfer time to battery is 0ms.

How much load can the SPY1500RMi2U support?
Up to 1500W. With an output power factor of 1.0, the VA and watt ratings are the same. It will carry 105-125% overload for 3 minutes and 125-150% for 30 seconds in line mode.

How long will the SPY1500RMi2U run on battery?
About 3.3 minutes at full load and 8.7 minutes at half load on internal batteries, rising to 64.8 minutes at full load and 148.4 minutes at half load with four EBM3618RT2U modules.

Can SPY1500RMi2U units run in parallel?
No, parallel operation is not supported on this model. Parallel configurations are available on the Symphony 6kVA and 10kVA models with the SPYPK parallel card.

Which output voltages does it support?
200, 208, 220, 230 or 240V AC at 50Hz or 60Hz. Output capacity derates by 10% at 208V and 20% at 200V.

How do I buy the SPY1500RMi2U?
Request a quote on this page, call 0845 561 0560, or find a Uniti Power partner near you.

Runtime figures are taken from the Symphony Range Brochure (V1.2025, PDF). Full specifications are in the SPY1500RMi2U datasheet (PDF).