Residential Energy Storage System (ESS) Information and Resources

Welcome to the Woodland Fire Department's resource page for Residential Energy Storage Systems (ESS). As the use of renewable energy grows, ESS has become an essential component for homeowners looking to store energy efficiently and enhance sustainability. This page provides important guidelines and resources for community members considering the installation of ESS in their homes.

What is a Residential Energy Storage System (ESS)?

An ESS allows homeowners to store electricity generated from renewable sources, such as solar panels, for use during peak hours or power outages. This promotes energy independence, reduces reliance on the grid, and can lower energy costs.

Fire Hazards Associated with Residential Energy Storage Systems (ESS) and Lithium-Ion Batteries

Residential Energy Storage Systems (ESS), particularly those using lithium-ion batteries, can pose fire hazards if not properly installed, maintained, or monitored. Lithium-ion batteries store significant amounts of energy, and under certain conditions, such as overheating, physical damage, or manufacturing defects, they can experience thermal runaway—a dangerous reaction leading to fires or explosions.

Thermal runaway is a situation where a lithium-ion battery gets too hot, leading to a dangerous chain reaction. It starts when one part of the battery gets overheated, which causes it to release energy that heats up other parts of the battery. As the heat builds up, it can cause the battery to catch fire or even explode.

In a residential energy storage system, this could happen if the battery is damaged, improperly installed, or if there's a fault in the system. It's why proper installation, regular maintenance, and monitoring are so important—these steps help prevent the battery from getting too hot in the first place. If you ever notice your battery getting unusually hot or hear any strange noises, it’s important to turn off the system and contact a professional immediately.

What can homeowner's do to maintain their ESS once installed?

Once an Energy Storage System (ESS) is installed, homeowners can take several steps to maintain it and ensure fire safety:

1. Regular Inspections: Check the system periodically for any visible signs of damage, such as frayed wires, corrosion, or unusual noises. Have a professional inspect it annually to ensure it's functioning properly.
2. Keep the Area Clean: Maintain a clutter-free space around the ESS, ensuring proper ventilation and reducing the risk of overheating. Avoid storing flammable materials near the system.
3. Monitor System Performance: Use the ESS monitoring app or system dashboard to track battery performance. Pay attention to any warnings or alerts and address them promptly.
4. Update Software: Keep the ESS software up to date. Manufacturers often release updates that improve safety features and performance.
5. Ensure Proper Ventilation: Make sure the ESS location has adequate ventilation to prevent overheating. Follow manufacturer guidelines for spacing and placement.
6. Check Emergency Shutoff: Know where the system's emergency shutoff is located, and ensure it's accessible in case of an emergency.
7. Maintain Temperature Control: Monitor the environment around the ESS and keep the temperature within the manufacturer’s recommended range. Extreme heat or cold can affect the system's performance and safety.
8. Professional Servicing: If any issues arise or if maintenance is needed, contact a certified professional to handle repairs. Do not attempt to fix issues yourself.

By following these steps, homeowners can help ensure the long-term safety and efficiency of their Energy Storage System.

RESIDENTIAL ESS HOMEOWNER BROCHURE