Connecticut Battery Storage
OneGrid is Connecticut’s Local Energy Resilience
& Savings Experts
Keep Your Lights On, Even When the Neighborhood Goes Dark.
- Power That Works for Connecticut
- Keep critical loads powered during outages and winter storms
- Grid Edge Protection & Maximum Upfront Rebates
- Supported by a local team that understands Connecticut energy programs
See how battery storage can protect your home.
Our Connecticut experts will evaluate your property and show how a battery can reduce costs, earn revenue, and improve resilience.
Our Guarantee
Every system includes a 10-year workmanship warranty, so you never have to worry about the what-ifsthe unknownspeace of minddependability.
Brands You Can Trust
Tesla Powerwall systems deliver high-capacity home battery storage with intelligent energy management. Popular across Connecticut, they support backup power, grid participation, and whole-home resilience.
Enphase batteries offer modular, reliable energy storage with seamless solar integration. Designed for resilience, they provide dependable backup power and flexible scalability for Connecticut homes.
FranklinWH batteries are built for whole-home backup and high-power demands. With robust capacity and storm-ready performance, they’re well suited for Connecticut winters and extended outages.
Outage-Proofing Your Home Made Easy
The Reasons Battery Storage Systems Make Sense
A battery backup system delivers more than just peace of mind. While some benefits are obvious, others can make a critical difference during power disruptions across Connecticut.
- Reliable backup power for rural and remote Connecticut homes
- Protection against severe New England weather and winter storms
- Peace of mind during grid disruptions, emergencies, and outages
- Resilience during rolling brownouts and utility blackouts
Take Back Control
The first step is to have a conversation without any pressure. We’ll respond to your enquiries and assist you in determining whether, how much, and why battery storage would be a wise choice for you.
FAQ's
Common Connecticut Energy Storage Questions
In Connecticut, energy storage acts as a critical bridge between your solar panels and the grid. During the day, your battery stores excess solar power. At night, or when the grid goes down, your home pulls from this stored energy to keep essential appliances like refrigerators and medical devices running. In 2026, the Energy Storage Solutions program manages how your battery interacts with the utility to maximize grid stability.
We provide a range of lithium-based batteries with either an LiFePO4 (Lithium Iron Phosphate) battery chemistry or an NMC (Nickel Manganese Cobalt) battery chemistry.
This statewide program provides both upfront and ongoing performance incentives to lower the cost of battery storage.
Upfront Rebate: Homeowners receive an immediate incentive of approximately $1,300.
Ongoing Payments: You can earn between $7,000–$10,000 in performance incentives over a 10-year term.
"Grid Edge" customers are those located on utility circuits that have historically experienced the longest and most frequent power outages.
The Bonus: If your home is classified as Grid Edge, you receive a 50% adder to your upfront incentive.
The Math: This increases the standard rebate from $250/kWh to $375/kWh. OneGrid can check your address against official Eversource and UI maps to confirm if you qualify for this higher tier.
Yes. To advance the state's clean energy goals, households at or below 60% of the State Median Income (SMI) qualify for significantly higher upfront rebates. These homeowners can receive $600 per kWh, which can cover the majority of a battery’s cost. Households in "distressed municipalities" or underserved communities also qualify for an elevated rate of $450 per kWh.
For homeowner-owned batteries, incentive payments are typically paid directly to the homeowner.
For batteries installed under a lease or managed ownership structure, ConnectedSolutions revenue is incorporated into lower monthly costs or shared
The solution to this is complicated and contingent upon several variables. These variables include the quantity and charge of batteries at the time of the outage, the amount of energy the property is using during an outage, and more. The size of a battery or bank of batteries should be sufficient to power your house until the grid is restored. You might install a smart service panel solution, like a SPAN panel, to have better control over how much electricity you use during an outage.
Yes. You can install a home battery as a standalone system without solar panels. In this configuration, your battery connects directly to your home’s electrical panel and charges using electricity from the utility grid.
Most modern solar batteries last between 10 to 15 years, depending on usage and environmental conditions. OneGrid installs premium-grade batteries with long warranties and reliable performance for years to come.
Indeed. Because battery storage systems are modular, you can always add more capacity. It's advisable to build a new solar panel array with batteries in mind if you anticipate adding them in the future.
Yes! If you already have a solar system, OneGrid can retrofit a compatible battery storage solution. Our team evaluates your setup and recommends the best integration for optimal efficiency and savings.
It depends on your energy habits and system size. OneGrid’s specialists perform an energy assessment to help you choose the right battery size for your household needs and backup goals.
Absolutely. While lithium-ion batteries can be sensitive to extreme cold, leading manufacturers now include integrated heating blankets and liquid thermal control systems to ensure optimal performance even in low temperatures. Solar panels actually become more efficient in cold weather, allowing them to continue trickling power into your battery even on sunny but freezing January days.
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