Technical Advisor Trevor Tremblay explains why following best practices and relying on licensed professionals will ensure a smooth and secure transition when integrating this exciting new technology.
Energy Storage Systems (ESS) are revolutionizing the way individuals and businesses manage energy, providing cost-saving opportunities, increased energy reliability, and a pathway toward sustainability. In this episode, ESA’s Karen Ras and Trevor Tremblay explore the technicalities and trends shaping ESS installations and what you need to know working with these in-demand systems.
At its core, an Energy Storage System stores energy for later use, enabling households and businesses to harness backup power during outages and reduce electricity costs through strategic charging and discharging. ESS is especially popular in areas prone to power outages, such as cottage country, and is often paired with solar systems to optimize energy independence.
The technology has become increasingly trendy, with homeowners installing systems not only for utility but also to keep up with neighbors. Even utility companies are using ESS instead of upgrading pole lines to improve reliability in certain areas.
The Role of ESS in Sustainable Energy
ESS is reshaping energy usage, particularly when paired with solar systems. “A solar array plus ESS is especially popular in remote locations,” he describes. “You use the solar and batteries to run your dedicated panel throughout the day and only rely on the utility when needed.”
ESS also aligns seamlessly with electric vehicle (EV) technology. “We’re seeing ESS inverters coming out with EV charger systems built in,” he said. “You plug the car right into the ESS.” Trevor explains this dual functionality not only enhances convenience but also simplifies installation for contractors.
Safety and Certification Are Non-Negotiable
Trevor shares the growing popularity of ESS has also introduced safety challenges, emphasizing the importance of working with certified systems.
"Because of the increased interest in these systems, there are some sellers out there that aren’t supplying fully certified equipment,” he said. “It’s very important for buyers and [contractors] who are doing the install to check for the right marks."
Certification for ESS is complex since systems often consist of multiple components, each requiring its own approval. "The whole energy storage system needs to be approved to UL 9540, and for multi-part BESS, the batteries will be approved to UL 1973 and the inverters to UL 107.1."
DIY installations, Trevor warns, are particularly risky. “These are very complex installations,” he said. “The best thing you might end up with is a bunch of useless and expensive equipment. The worst? You could burn your house down.”
Installation Best Practices: Space, Wiring, and Location
Proper installation is key to ensuring both safety and performance. Trevor outlines critical guidelines for contractors and homeowners:
- Wiring: Installers must use fine-strand cables, not welding cables, which are not voltage-rated.
- Working Space: Safety regulations require at least one meter of clear space in front of ESS equipment, providing enough room to get away from the equipment if there’s a hazard.
- Location: ESS cannot be installed in crawlspaces, bedrooms, or rooms directly connected to sleeping areas. The room must have a self-closing door, gypsum board walls, and an interconnected smoke alarm.
For commercial properties, regulations are more flexible, but Trevor reminds contractors that the system must still be certified to 9540 and meet spacing requirements from windows, doors, and points of egress.
Battery Types: Lithium-Ion vs. Lead Acid
Not all ESS setups are the same, with lithium-ion and lead-acid batteries presenting distinct advantages and risks. Lithium-ion is more popular due to its higher energy storage capacity, but as Trevor notes, it carries “a higher risk of fire.”
Conversely, while lead-acid batteries are safer, providing they are properly ventilated, they store less energy. Trevor advises with proper maintenance, lead-acid batteries are “pretty much trouble-free.”
Energy Storage Systems are not just technological innovations; they represent a critical step toward sustainable and reliable energy. However, safe installation and adherence to regulations are paramount to avoiding costly or dangerous mistakes.
For LECs and homeowners looking to integrate ESS into their energy solutions, following best practices and relying on licensed professionals will ensure a smooth and secure transition to this exciting new technology.
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