How PowerStack™ Works

PowerStack™ is a solar + storage system designed to help you save money on your energy utility bill. It does that by making affordable, reliable and clean solar power available all day long, even at night.

01

Sunlight hits the solar panels,
producing clean, renewable energy.

02

Some of that clean energy powers
your home during the day.

03

And some of that clean energy is stored
in the battery to be used at night.

04

At night, your home runs on
the stored energy, powering things
like lights, TVs and air conditioners.

05

For the times when you need a little
extra power, your home will be
connected to the grid. But you’ll want
to be sure to use this sparingly.



Benefits

PowerStack™ is available as a lease with no money down and low, fixed monthly payments. It also comes with an industry-leading, 25-year warranty. But that’s not all. Here’s what else you can expect with PowerStack™:

 PLAN FEATURESPLAN BENEFITS
No upfront costs Start saving money immediately once the switch is flipped on.1
Fixed, low monthly payments Always know what you'll pay for solar energy; no surprises.1
Comprehensive warranty2 An unmatched warranty that covers the solar components for 25 years and the battery for 10 years, with a replacement at no charge – even for the labor.
24/7 system monitoring Keep your energy costs low by tracking your production, storage and consumption.
25-year agreement term That's 25 years of annual fixed costs for your home's electricity.1
Transferable agreement If you sell your home, we'll make it easy to pass on the savings to the homebuyer.
Save even more up front.

When you sign up for the Sunnova PowerStack™ Plan, you have the option of including an escalator in your solar service agreement. The purpose of the escalator is to provide more significant savings in the early years of your agreement. You’ll pay a lower initial rate per kWh in return for a slight increase in your rate each year. The following illustration compares monthly payments over 25 years with and without an escalator.

Escalator

 



Production, Storage and Consumption

As a solar+storage system, PowerStack™ is designed to meet most of your everyday energy needs. While solar is a renewable energy source, there is a limit to how much your system can produce and store on any given day. 

Like all solar power systems, PowerStack™ produces more energy on a bright, sunny day than on a cloudy one. It also will likely produce more in the summer than in the winter, simply because the days are longer. The battery, or storage part of PowerStack™, works a lot like the battery in a phone or laptop. Once it’s full, it won’t take any more electricity. And when it’s empty, it won’t have any energy to give. 

We’ve designed the PowerStack™ according to your average monthly energy consumption, maximizing your solar energy use and replacing much of the electricity you would normally draw from the grid. To really see savings, it’s important you try to maintain the same level of consumption as before. 

 

PowerStack Consumption

 

We understand there’ll likely be days you’ll need more energy than usual. For those days, your home is still connected to the grid and you’ll use electricity from the grid. Using electricity from the grid will decrease your energy savings.

Your solar system production will vary based on weather and other factors. The solar production must be consumed at your home or stored in the system’s batteries. If there isn’t demand for the solar production at home or capacity in the batteries to store additional electricity, the solar system will decrease the amount of power it is producing. This reduction of production is known as curtailment, and may happen based on your energy consumption patterns. If your system regularly curtails, you will receive less solar production and may have to purchase more supplemental energy from your utility, decreasing your expected savings.

 

1 Your solar system’s production will vary based on weather and other factors. If there isn’t demand of your solar production at home or capacity in the batteries to store additional electricity, the solar system will decrease the amount of power it is producing. This reduction of production is known as curtailment, and may happen based on your energy consumption patterns. When this happens, you will receive less solar production and may have to purchase more supplemental energy from your utility, decreasing your expected savings.

2 Refer to the Warranty Agreement for complete warranty terms and limitations.

See if you qualify for solar service with PowerStack™.

Find out how much you can save with solar power. There’s no obligation, so you have nothing to lose -- except part of your electricity bill.

By submitting my information, I am agreeing to Sunnova's Terms & Conditions.

Terms & Conditions

By submitting my information via this form, I authorize Sunnova and/or its partners to call me and/or send me pre-recorded messages and/or text messages about Sunnova's products and services at the telephone number I entered above, using an automatic dialing system, even if I am on a national or state "Do Not Call" list. Message and data rates may apply. I understand that consent here is not a condition of purchase.

How PowerStack™ Saves You Money

PowerStack™ offers solar energy day and night at a price that’s lower than what grid power costs. And, because you keep all the solar power the system creates, solar becomes your home’s primary power source, and the utility grid becomes your supplemental electricity source.



How to Maximize PowerStack™ Savings

We’ve designed PowerStack™ to maximize solar energy use and replace much of the electricity you would normally draw from the grid. While most of your electricity usage is consistent and predictable, there are instances when you may use more or less electricity than usual. If your electricity usage spikes, you’ll be able to draw electricity from the grid and the utility will charge you for that electricity. If your electricity use declines too much, your battery may be full and any unused solar energy will be lost.

This is called curtailment and it happens when the battery is full and the solar panels are creating more power than is being used. While some curtailment is normal, having too much solar power curtailed could reduce savings. Luckily, there are a few things you can do.

To get the most out of PowerStack™ and avoid curtailment, there are some changes you might want to make to your energy habits: 

Shift as much electricity use to the day as possible. Make simple changes to your habits, like: Charge your laptops and mobile devices, cook, and do the laundry and dishes during the day.
Be energy efficient at night. It’s as simple as turning off lights in unoccupied rooms and setting thermostats to moderate temperatures.
Track your usage. Knowledge is power, literally. Simply knowing where energy is used in your home will help you better manage it.
Plan for spikes. There are times when we use more electricity than normal, like during the holidays or when family comes to visit. Having a full battery and telling your guests how your system works will help you manage your energy costs.



How Two Bills Add Up to Savings

There may be times when you need a little extra power than what PowerStack can provide. For those times, your home will use power from the grid to keep the lights on. That means you’ll still be a utility customer and you’ll still get a monthly bill from the utility, even if you don’t use any power from the grid.

Since the vast majority of your home’s power will be provided by PowerStack, the amount of power you take from the grid should be considerably less than before. Your smaller utility bill, plus your low, fixed PowerStack bill should result in real savings.1

 

1 Your solar system’s production will vary based on weather and other factors. If there isn’t demand of your solar production at home or capacity in the batteries to store additional electricity, the solar system will decrease the amount of power it is producing. This reduction of production is known as curtailment, and may happen based on your energy consumption patterns. When this happens, you will receive less solar production and may have to purchase more supplemental energy from your utility, decreasing your expected savings.

See if you qualify for solar service with PowerStack™.

Find out how much you can save with solar power. There’s no obligation, so you have nothing to lose -- except part of your electricity bill.

By submitting my information, I am agreeing to Sunnova's Terms & Conditions.