A battery backup system is essential for ensuring your tankless water heater continues running during power outages, especially in homes that rely on electric ignition or controls for natural gas or propane heaters. Here are some of the best battery backup options for tankless water heaters:
1. ECO-WORTHY 12V 100Ah Lithium Battery Backup with Inverter
- Why It’s Great: This setup includes a high-capacity 100Ah lithium battery and a pure sine wave inverter, which provides clean power for your tankless water heater during outages. The lithium battery has a longer lifespan and quicker recharge time compared to traditional lead-acid batteries.
- Best For: Homeowners who need extended backup power for electric ignition gas tankless water heaters.
- Key Features:
- Compact design for easy installation.
- Long battery life and fast recharging.
- Pure sine wave inverter protects sensitive electronics in your heater.
2. Renogy Phoenix 300 Power Station
- Why It’s Great: The Renogy Phoenix 300 is a portable power station that can easily power a tankless water heater’s electronic components during short power outages. It’s compact and rechargeable through solar panels, making it an eco-friendly solution.
- Best For: Portable and solar-compatible backup power.
- Key Features:
- 300W output, ideal for powering low-wattage electronics in gas or propane tankless water heaters.
- Multiple charging options, including solar.
- Lightweight and portable for emergency situations.
3. Goal Zero Yeti 500X Portable Power Station
- Why It’s Great: The Goal Zero Yeti 500X offers reliable, portable power with 505Wh capacity. It is perfect for keeping a tankless water heater’s ignition system running during longer outages. It’s a solar-compatible solution and has multiple output options (AC, USB).
- Best For: Longer outages with solar recharging options.
- Key Features:
- Silent operation with no fumes.
- Can be charged through solar panels for off-grid applications.
- Enough capacity to power multiple devices, including your water heater’s controls.
4. APC Back-UPS Pro 1500VA (BR1500G)
- Why It’s Great: For homes that only need a backup for the electronic ignition or controls, the APC Back-UPS Pro 1500VA is an affordable option. This uninterruptible power supply (UPS) can handle lower wattage equipment like tankless heater control panels during brief power outages.
- Best For: Short-term backup for homes with natural gas or propane tankless heaters.
- Key Features:
- LCD display to monitor power usage and battery life.
- Protects against surges and spikes.
- Automatic voltage regulation to keep your tankless water heater running smoothly.
5. Champion 100692 Inverter Generator
- Why It’s Great: While not a traditional battery backup, the Champion 100692 is a portable inverter generator that provides power during long-term outages. Inverter generators are quieter and produce clean power that’s safe for sensitive electronics like your tankless water heater.
- Best For: Homes prone to extended power outages.
- Key Features:
- 2000-watt starting power, ideal for most residential water heaters.
- Quiet operation and fuel-efficient for long runs.
- Portable with multiple outlets for other household appliances.
Key Considerations:
- Power Needs: For gas or propane heaters with electronic ignition, look for battery backups with at least 500W output. For electric tankless water heaters, you may need a generator or larger power station.
- Battery Life: Choose a battery backup with enough capacity to cover extended outages. Lithium-ion batteries typically offer longer life and faster recharging times compared to lead-acid batteries.
- Portability vs. Permanent Installation: Decide between a portable solution like the Goal Zero Yeti for flexibility, or a fixed battery backup for permanent installation.
- Pure Sine Wave Inverter: For sensitive electronics, ensure the backup system includes a pure sine wave inverter to prevent damage.
Conclusion:
For most gas tankless water heaters, the Eco-Worthy 12V 100Ah Battery or Renogy Phoenix 300 Power Station will provide reliable and long-lasting power backup. If you need a more permanent or extended solution, consider the Champion Inverter Generator for its capability to handle larger loads and longer outages.