APC Back-UPS Pro BR1500MS2 Review: The Pure Sine Wave Standard

If you have a gaming PC, workstation, or any system with an Active PFC power supply, the APC Back-UPS Pro BR1500MS2 is the UPS you should buy. Its pure sine wave output eliminates the compatibility headaches that simulated sine wave units can cause, and it does it at a price that’s reasonable for the quality.

Key Specs at a Glance

• Capacity: 1500VA / 900W
• Battery: 259Wh
• Waveform: Pure sine wave
• Outlets: 10 (6 battery + surge, 4 surge only)
• Extras: USB-C + USB-A charging ports, AVR
• Weight: 24.2 lbs

Who Is It For?

PC gamers, content creators, and anyone running a system with a modern Active PFC power supply. If you’ve ever wondered whether your UPS is truly compatible with your high-end PSU, the BR1500MS2 removes all doubt with pure sine wave output.

Pure Sine Wave Matters

Here’s the thing most people don’t realize: many modern PC power supplies — especially 80 Plus Gold and higher — use Active PFC circuits that can malfunction or refuse to switch over on simulated sine wave UPS units. The BR1500MS2’s pure sine wave output is electrically identical to what comes out of your wall outlet. Your PC won’t know the difference during a power outage, which is exactly the point.

Built-in USB Charging Is a Nice Touch

APC added a USB-C and USB-A port directly on the front panel. These charge your phone or tablet independently of the main outlets, so you don’t waste a battery-backed outlet on a phone charger. It’s a small detail that shows APC is thinking about how people actually use a UPS in a home office.

The Trade-offs

At $260, the BR1500MS2 costs roughly $70 more than comparable simulated sine wave UPS units like the CyberPower CP1500AVRLCD. That premium buys you pure sine wave output, but if your PC doesn’t have an Active PFC power supply, you may not need it. The 10-outlet count is also lower than CyberPower’s 12, which can feel limiting if you have a lot of peripherals. And at 24.2 lbs, plan on it staying wherever you first set it down.

The Bottom Line

The APC Back-UPS Pro BR1500MS2 is the best consumer UPS for modern gaming PCs and workstations. The pure sine wave output, AVR, and USB-C charging justify the premium over simulated sine wave competitors. If your power supply is Active PFC rated — and most good ones are — this is the safe choice.