Two homeowners stand by their home battery backup power source, a Maine-made battery charged with solar power

The next generation of battery storage has arrived, giving solar customers clean, reliable, and efficient backup power that also lessens their daily dependence on the power grid.

Grid-tied solar electric systems are a great way to save money using free power from the sun. However, most grid-tied solar arrays are designed to shut down when they lose grid connection. This means when the grid is out, your solar panels are too – even if it’s sunny out. It’s important that this happens, to protect line workers from harm, but solar owners miss out on power production nonetheless.

When you pair solar electricity with battery storage, you can supply critical loads in your home, or even function as an off-grid “energy island.”

Why Install Battery Backup Power?

Tesla PowerwallLoad shifting – Powerwall can charge during low rate periods when demand for electricity is lower and reduce demand charges during more expensive rate periods when electricity demand is higher.


Back-up power – Assures power in the event of a grid outage. Quiet, affordable backup power without the burning of fossil fuels.


Self-consumption of solar power generation – Store surplus solar energy during daylight hours and use that energy later when the sun is not shining. Reduces your dependence on the utility grid, and reliance on Net Energy Metering.

How Battery Backup + Solar Power Works

We currently offer a number of options for battery storage depending on the design goals of the customer. Here are a few:

Tesla Powerwall

ReVision Energy is a Tesla Powerwall Certified Installer, which means we offer a customized solar-plus-battery solution that enables you to access the free, abundant power of the sun at your home and reduces your reliance on fossil fuels. We have Tesla Powerwall 2 units available now across our geographic region of MaineNew Hampshire, and Massachusetts.

With the Powerwall you can store solar energy generated during the day for use at any time. During the day, the sun shines on your solar panels, charging your battery. At night, your home draws electricity from your battery, powering your home with clean, sustainable energy 24/7.

Installing a Powerwall with ReVision Energy is easy. We take care of everything from system design to permitting, installation, financing, and ongoing customer service.

Powerwall consists of a 14 kWh lithium-ion battery pack, liquid thermal control system, an integrated inverter and software that intelligently dispatches electricity when it’s needed most. The unit mounts seamlessly on a wall or on the ground, indoors or outdoors, and is connected to the grid to export excess energy, maximizing your opportunity for economic benefit.

Kristen and Josh of Rochester, NH had a Powerwall installed and wrote us to say:

Going solar had been a dream for us since we bought our house 10 years ago, but we really wanted to store our energy, too. With the Tesla battery, and our panels, we were able to make that dream a reality! We love that we are able to teach our daughter about alternative energy while providing a cleaner, greener future for her!”

We also spoke with Kate Olson and Matt Cheney who paired a Powerwall with their solar array at their 1870 farmhouse in Freeport, Maine:

“We live in a relatively rural area where there are power outages. A lot of people get generators for backup, but we’ve never wanted to do that.

Unlike a generator, the Powerwall is completely silent and powers on in a fraction of a second during a grid outage.

For us, we’re excited about capturing energy and creating electricity in general but then there is something nice about feeling like you’re actually using the solar energy you are producing rather than throwing it out to the grid.”

Learn more: or Download the Tesla Powerwall Brochure (PDF)

Future-Proof Solar Investments

An image of solar panelsReVision Energy has been following the developments in home battery backup technologies for years. In the early days, the only kind of solar energy systems were off-grid (battery-only) systems, and then with the advent of grid-tied inverters, the obvious benefits of tying up to the grid became clear.

Now, technology has come full-circle, and a grid-tied solar customer can enjoy the benefits of being tied to the grid, with the resilience and independence of having battery support.

Customers who want to maximize the financial savings of their solar investment can start with a straight grid-tied array for maximum savings and lowest upfront cost, then invest later in a home battery backup solution when they are ready. While there is great battery technology on the market already, we expect that this segment of solar technology will rapidly improve over the next 5-10 years.

Learn More About Home Battery Backup & Energy Storage

ReVision Energy strives to stay at the top of all trends in renewable energy, and solar backup power is one of the hottest topics right now. Our engineers worked with our editorial team extensively for an in-depth, three-part series on the current state of battery backup storage and its implications for the homeowner, and the grid, writ large:

Part 1:

Solar + Batteries: Is Tesla’s PowerWall the iPhone of Battery Storage?

Part 2:

Solar + Batteries: The Right Thing to Power my Home?

Part 3:

Solar + Batteries: Technologies on the Bleeding Edge

Battery Backup Photo Gallery