Pi Zero UPS HAT (B) for Raspberry Pi Zero

5-24V Solar Input with MPPT

Pi Zero UPS HAT (B) for Raspberry Pi Zero UPS Module, 5-24V Solar Input with MPPT, I2C Monitoring, Battery Holder, Overcharge Protectio

Product Overview

Smart, Uninterrupted Power for Your Raspberry Pi Zero

The Pi Zero UPS HAT (B) transforms your Raspberry Pi Zero into a resilient, mobile, or off-grid capable device. Whether you need a reliable power backup, want to deploy a remote sensor, or are building a portable project, this HAT provides clean, regulated 5V power from a battery or solar panel. Its intelligent path management ensures your Pi continues to operate seamlessly during power source transitions. With onboard MPPT for solar input, real-time I²C monitoring, and comprehensive hardware protections, it is a complete power management solution in a compact, Pi Zero-sized footprint.

Key Features:

  • True Uninterruptible Power:The ETA6003 charge management chip with dynamic path control allows your Pi Zero to run directly from input power while simultaneously charging the battery. If input power is lost, the battery takes over instantly – no reboot, no data loss.
  • Versatile Solar Input with MPPT:Connect solar panels from 5V to 24V. The CN3791 chip automatically tracks the maximum power point, adjusting the charging voltage via a 6-position DIP switch (configurable from 5V to 24V) for best efficiency in variable sunlight.
  • Real-Time I²C Monitoring:Using the INA219 chip, you can read live battery voltage, charge/discharge current, and power via the I²C bus. We provide a Python example (INA219.py) to get you started with your own power monitoring scripts.
  • Clear Battery Status LEDs:No need to log in to check your battery. Four LEDs show an instant 4-level indication (25%, 50%, 75%, 100%). The red CHRG LED lights up while charging, giving you at-a-glance status.
  • Complete Hardware Protection:The board includes solar input anti-reverse protection, battery overcharge protection, over-discharge cut-off, output overcurrent limiting, and short-circuit protection. A physical power slide switch isolates the output for safe assembly.

SpecificationDetails
ModelPi Zero UPS HAT (B)
Onboard ChipsTPS61088, ETA6003, CN3791, INA219, HM1160
Communication InterfaceI²C
Power InputUSB: 5V / Solar: 5V–24V
Output Voltage5V
Mounting Hole Diameter2.5mm
Dimensions65mm (L) × 30mm (W)

Resource Overview

  1. Power & Communication Pins
  2. Boost Converter Chip for 5V Output
  3. Lithium Battery Charging Chip
  4. Type-C Connector: Supports 5V input
  5. Solar Charging Connector: Connects to solar panels via terminal block; be sure to observe correct polarity
  6. Solar Charging Chip
  7. Slide Switch: When switched to ON, the power pin outputs 5V; when OFF, 5V output is disabled
  8. MPPT Voltage Setting DIP Switch: Used to configure the MPPT charging voltage according to the solar input, improving charging efficiency
  9. Onboard Battery Level Indicator LEDs
  10. Charging Indicator LED: CHRG LED lights up when power is supplied via Type-C or DC input

Precautions

  • Do not plug or unplug modules while they are powered on.
  • Follow all warnings and guidelines provided on the product.
  • Keep the product dry. In case of accidental splashing or immersion in any liquid, immediately disconnect the power and thoroughly dry the product.
  • Ensure proper ventilation and heat dissipation in the operating environment to avoid damage to components due to high temperatures.
  • Do not use or store the product in dusty or dirty environments.
  • Avoid using the product in environments with frequent temperature changes to prevent condensation damage to the components.
  • Handle the product gently, as dropping, hitting, or severe shaking may damage the circuits and components.
  • Do not clean the product with organic solvents or corrosive liquids.

  • 1.Complete Kit – One-Stop Shop: This kit includes both the UPS HAT main board and the 2-pin battery holder. No need to purchase separate accessories – just add your own 3.7V lithium battery (with 2-pin connector) and you're ready to go.
  • 2.True UPS Functionality with Path Management: The onboard ETA6003 charge management chip supports simultaneous charging and discharging, providing seamless switchover without rebooting your Raspberry Pi Zero.
  • 3.Wide Solar Input with MPPT Optimisation: Accepts 5V to 24V from solar panels. The onboard CN3791 chip with MPPT ensures you harvest the maximum available power from your solar source, especially in variable light conditions.
  • 4.Real-Time I²C Monitoring: The high-precision INA219 monitoring chip lets you read live battery voltage, current, and power via I²C (address 0x43). Perfect for data logging and smart power management in your projects.
  • 5.Robust Hardware-Level Protection: Safeguard your Pi Zero and battery with built-in protection against reverse-polarity (solar input), overcharge, over-discharge, overcurrent, and short circuits. A physical slide switch disconnects output during assembly for safety.
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SKU: B0H4471ZK4
Weight: 35 Grams
Brand: Hengantech
Manufacture: Hengantech

Product Description

Text reads "UPS for Raspberry Pi Zero" with technical specifications and features listed. Image shows Raspberry Pi circuit board with blue cylindrical battery component and blue interface icons below.Text reads '8V-24V Solar Input | USB5-6.5V Input' and product specifications. Electronic circuit board with solar panel attachment, USB connector, and blue cylindrical battery component visible.

Resource Overview

  1. Power & Communication Pins
  2. Boost Converter Chip for 5V Output
  3. Lithium Battery Charging Chip
  4. Type-C Connector: Supports 5V input
  5. Solar Charging Connector: Connects to solar panels via terminal block; be sure to observe correct polarity
  6. Solar Charging Chip
  7. Slide Switch: When switched to ON, the power pin outputs 5V; when OFF, 5V output is disabled
  8. MPPT Voltage Setting DIP Switch: Used to configure the MPPT charging voltage according to the solar input, improving charging efficiency
  9. Onboard Battery Level Indicator LEDs
  10. Charging Indicator LED: CHRG LED lights up when power is supplied via Type-C or DC input

Precautions

  • Do not plug or unplug modules while they are powered on.
  • Follow all warnings and guidelines provided on the product.
  • Keep the product dry. In case of accidental splashing or immersion in any liquid, immediately disconnect the power and thoroughly dry the product.
  • Ensure proper ventilation and heat dissipation in the operating environment to avoid damage to components due to high temperatures.
  • Do not use or store the product in dusty or dirty environments.
  • Avoid using the product in environments with frequent temperature changes to prevent condensation damage to the components.
  • Handle the product gently, as dropping, hitting, or severe shaking may damage the circuits and components.
  • Do not clean the product with organic solvents or corrosive liquids.

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