Uninterruptible Power Supply (UPS) for Raspberry Pi 4 and 5: Top 5 Solutions for High-Load Setups
Developing projects based on the Raspberry Pi 4 or Raspberry Pi 5 often involves connecting external peripherals. High-speed NVMe SSDs, external USB drives, and various sensors require stable and uninterrupted power. Standard Raspberry Pi 4 boards typically require 5V/3A, while the Raspberry Pi 5 demands up to 5V/5A (or a minimum of 5V/3A with restricted USB output current) to operate stably under full load without triggering under-voltage warnings.
When external SSDs are connected, a sudden power outage can lead to severe data corruption. Implementing an uninterruptible power supply (UPS) is the most effective way to ensure system reliability and data integrity.
Below is an analysis of the top 5 UPS solutions available on the market, chosen for their ability to deliver stable high-current output under load.
Top 5 UPS Devices for Raspberry Pi 4 & 5
1. Argon PWR 27W UPS (for Raspberry Pi 5)
- Output specifications: 5.1V / 5A (Up to 27W via USB-C)
- Battery type: Built-in Li-Po battery (5000mAh or 10000mAh options)
- Key features: Onboard MCU communicating via USB-C (e-marker), physical on/off switch, sleep/wake button, seamless integration with Argon Neo 5 cases.
- User Feedback & Opinions: Users highly appreciate the plug-and-play design and the fact that it natively delivers the full 27W required by the Raspberry Pi 5. There are no low-voltage warnings even with an active NVMe SSD HAT. Some reviews point out that the unit is relatively bulky and designed specifically with Argon cases in mind.
2. Waveshare UPS HAT (B) (with Pogo Pins)
- Output specifications: 5V / up to 5A continuous
- Battery type: 2x 18650 Li-ion batteries (not included)
- Key features: Pogo pin connection (no GPIO pins occupied on Raspberry Pi 5/4), I2C real-time monitoring (voltage, current, remaining capacity), multi-battery protection circuits.
- User Feedback & Opinions: This model is praised for its high power output, allowing external SSDs to run reliably. The use of pogo pins is frequently mentioned as a massive benefit, leaving the GPIO header free for other hats. Some users warn that 18650 batteries must be bought separately from reliable sources, and the lack of an enclosed case requires careful handling.
3. Waveshare UPS HAT (E)
- Output specifications: 5V / 6A continuous (up to 40W fast-charging support)
- Battery type: 4x 21700 Li-ion batteries (not included)
- Key features: Bi-directional Type-C fast charging (PD 3.0), I2C communication, high-capacity battery support, integrated fuel gauge IC.
- User Feedback & Opinions: Outstanding for heavy-duty setups. The 6A continuous output guarantees that multiple USB devices and SSDs run without hiccups. Online reviews suggest this is the ultimate choice for long-term offline runtime due to the massive 21700 battery capacity. The only downside mentioned is the physical size and the cost of purchasing four high-quality 21700 cells.
4. Geekworm X1208 UPS + M.2 NVMe Shield (for Raspberry Pi 5)
- Output specifications: 5.1V / 5A
- Battery type: 2x 18650 Li-ion batteries (not included)
- Key features: 2-in-1 design combining an uninterruptible power supply with an onboard M.2 2280 NVMe SSD slot, auto power-on, and safe shutdown.
- User Feedback & Opinions: Highly recommended for clean, compact builds utilizing SSDs. It solves the storage and backup power issue simultaneously. Reviewers note that having the SSD and UPS on a single stack reduces cable clutter significantly. However, a few users mention that the thermal management needs attention, as both the NVMe drive and charging circuitry generate noticeable heat.
5. DFRobot FIT0992 (18650 Battery UPS HAT)
- Output specifications: 5.1V / 5A
- Battery type: 2x 18650 Li-ion batteries (not included)
- Key features: Automatic power-cut upon shutdown, wide input voltage range (6-18Vdc), software control via I2C.
- User Feedback & Opinions: Considered a very reliable and industrial-grade option. Users report stable performance with 5V/5A requirements, noting that switching from DC power to battery is seamless and does not cause system reboots. The industrial-style DC Jack (5.5×2.1mm) input is appreciated for cabinet installations, though it is less convenient for those relying solely on USB-C power adapters.
Summary
For heavy-duty Raspberry Pi setups utilizing external SSD drives, basic 5V/2.5A or 5V/3A UPS modules are insufficient. To avoid under-voltage throttling, selecting a high-current alternative (at least 5V/5A) is paramount. The Argon PWR 27W is the most elegant, consumer-friendly choice for Raspberry Pi 5. For modularity and custom battery capacity, the Waveshare UPS HAT (B) or the high-capacity HAT (E) represent robust, developer-approved alternatives.
