CyberPower CP1500EPFCLCD-UK
Got a NAS with an active PFC power supply? The CyberPower CP1500EPFCLCD-UK delivers a true pure sine wave on battery, where a standard UPS can struggle to match it.
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Characteristics
- Power: 1500VA / 900W
- Output wave: Pure sine wave
- Outlets: 2x UK + 4x IEC, all battery-backed
- Runtime: ≈11 min at half load, 3 min at full load
- Pure sine wave, compatible with active PFC power supplies
Detailed overview: CyberPower CP1500EPFCLCD-UK UPS
The CyberPower CP1500EPFCLCD-UK is a backup UPS built to protect a fixed piece of electronics, not to replace a solar inverter or a van's 12V to 230V converter: it constantly monitors mains power and switches to battery the instant it detects an outage or a voltage sag. For a home fitted with residential solar, that is exactly what belongs between the wall socket and a NAS, a home server, a router or a Starlink dish.
Its real distinguishing feature is the output wave on battery: a pure sine wave, identical to mains power, where many consumer UPS units settle for a simulated sine wave (a stepped approximation). In practice, an active PFC power supply, common on NAS units and servers built in the last few years, can struggle with a simulated wave: humming, overheating, or even a protective shutdown the moment it switches to battery. The CP1500EPFCLCD-UK's pure wave avoids that problem entirely, and suits both an entry-level NAS and a more demanding small server.
With 1500VA and 900W of continuous power, it leaves comfortable headroom to run a NAS, switch and router together. Its 6 outlets (2 UK-type plus 4 IEC) are all battery-backed, automatic voltage regulation (AVR) corrects mains fluctuations without touching the battery, and the LCD screen shows load, runtime and voltage in real time. The USB port and CyberPower's PowerPanel monitoring software let you schedule an automatic, clean NAS shutdown if an outage runs longer than the available runtime (around 11 minutes at half load, 3 minutes at full load). GreenPower UPS technology also trims standby power draw compared with a conventional UPS.
Two USB-A ports let you charge a phone or tablet straight from the unit, even outside a power cut. Over time, this pure sine wave choice costs a bit more than a comparable simulated-wave UPS, but it is money well spent whenever the protected equipment is sensitive to power quality.
Comparison
When choosing a UPS to protect a NAS or home server, the CyberPower CP1500EPFCLCD-UK is often compared to other models in the same power class, in searches like "CyberPower vs Eaton Ellipse" or "CyberPower vs APC". Here is how it stacks up against three frequently cited alternatives: the Eaton Ellipse PRO 1200, slightly less powerful but with an equivalent LCD screen and monitoring software; the APC Back-UPS BE850G2, cheaper but less powerful and simulated-wave only; and the APC Back-UPS BX500MI, an entry-level pick for a tight budget.
| Criterion | CyberPower CP1500EPFCLCD-UK | Eaton Ellipse PRO 1200 | APC Back-UPS BE850G2 | APC Back-UPS BX500MI |
|---|---|---|---|---|
| Power | 1500VA / 900W | 1200 VA / 750 W | 850 VA / 520 W | 500 VA / 300 W |
| Output wave on battery | Pure sine wave | Simulated sine wave | Simulated sine wave | Simulated sine wave |
| Outlets | 2x UK + 4x IEC, all battery-backed | 8x IEC C13 (4 battery-backed + 4 surge-only) | 8 outlets (6 battery-backed + 2 surge-only), 2 USB | 3x IEC C13 |
| Display / monitoring | LCD + USB software | LCD + USB software | LED indicators | LED indicators |
| Observed price | £297.26 | £304.08 | ≈ £125 | £60.55 |
Overall, the CyberPower CP1500EPFCLCD-UK is the only one of these four models with a true pure sine wave output, a real advantage for the active PFC power supplies found in newer NAS units and servers, and it also delivers the highest power rating in the comparison at a similar price to the Eaton. The Eaton Ellipse PRO 1200 remains a solid, slightly cheaper alternative if pure sine wave is not a strict requirement, while the two APC models suit tighter budgets, with trade-offs on power and, for the BX500MI, no LCD screen at all.
Related video
Video: CyberPower CP1500PFCLCD Battery Backup Review: Real Results and Performance - Published on 26/02/2026
Our tester's review: Dawid Lojewski
We plugged the CP1500EPFCLCD-UK into our NAS and a small home server with an active PFC power supply, the kind of setup where a budget UPS can make the power supply audibly complain the moment it switches to battery. Not here: the pure sine wave means the server barely notices the difference between mains and battery, no odd fan noise or power supply error message. The LCD screen is clear and cycles automatically through the useful readings (load, runtime, voltage). During an outage test, the switch was instant and silent. The one catch: at full load, runtime drops fast to about 3 minutes, so this is one to pair with the USB monitoring software for an automatic clean NAS shutdown rather than relying on a long runtime. A UPS clearly built for power quality rather than endurance, which is exactly what a demanding NAS or small server owner is after.
Frequently asked questions: CyberPower CP1500EPFCLCD-UK UPS
A pure sine wave faithfully reproduces mains power, unlike a simulated sine wave (a stepped approximation). Some active PFC power supplies, common on recent NAS units and servers, can hum, overheat or shut down for safety on a simulated wave. A pure wave avoids that risk entirely.
A solar inverter converts DC power from panels into AC for the home, while a UPS like the CP1500EPFCLCD-UK protects a fixed device (NAS, server, router) from mains outages by switching to battery for a few minutes.
CyberPower rates about 11 minutes at half load and only 3 minutes at a full 900W load. That is enough for the USB monitoring software to trigger a clean shutdown, but not for extended work sessions.
Yes, the CP1500EPFCLCD-UK has 2 dedicated UK-type outlets plus 4 IEC C13 outlets, all battery-backed, covering both standard UK plugs and IEC-corded equipment like many NAS units and servers.
Yes, the CP1500EPFCLCD-UK has two dedicated USB-A charging ports, usable both on mains power and during an outage.
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Published on 04/09/2026