If you are looking for battery storage installers in Rockford, IL, you are probably weighing more than which brand of battery to buy. You are deciding who will match a battery to your home, your existing equipment and your ComEd account, and who will handle everything between the first conversation and the day the system turns on.
This guide covers what a home battery actually does, what to ask any installer before you sign, and the utility details that are easy to miss in ComEd territory. Windfree Solar has been designing and building solar in Illinois and the Midwest since 2009, in both ComEd and Ameren territory, and battery storage is a growing share of what homeowners ask us about.
Summary
- A home battery stores energy for later: backup during outages, better use of the solar your panels produce, and participation in utility programs where available.
- Batteries are far more customized than solar panels. Your existing inverter, electrical panel and backup goals decide what will work.
- Storage rebates and equipment changes can affect your solar buyback rate, and joining ComEd’s virtual power plant program moves you onto hourly pricing.
- A good installer tells you up front if storage is not the best investment for your home right now.
- Ask who handles the full scope: engineering, permitting, interconnection, inspection and permission to operate.
What a Home Battery Actually Does
A battery stores energy so you can use it later. Paired with solar, that opens up a few things:
- Backup power during outages
- Better use of the solar energy your panels already produce
- More energy independence
- Participation in utility programs like virtual power plants, where available
- A foundation for an electric vehicle or a more electrified home later on
One thing that surprises a lot of homeowners: the battery is designed to charge from your solar array, not from the grid. It stores the energy your panels produce during the day so you can draw on it later. That is one reason the right battery depends so much on the solar system you have, or the one you are planning.
Questions to Ask Any Battery Installer
Solar panels are fairly standardized. Batteries are not. Two houses on the same street can need very different setups. These are the questions worth asking before you choose an installer:
- Will this battery work with my existing equipment? If you already have solar, sometimes installed by another company, your current inverter and electrical panel shape which batteries can be used and what extra components may be needed.
- Is the design whole-home backup or critical loads? Windfree’s standard design is whole-home backup whenever it is feasible, which avoids a separate critical-loads panel. Depending on your electrical demand, energy usage and the battery you choose, some high-energy appliances may still need to be managed during a long outage.
- How will this affect my buyback rate? Certain storage rebates from ComEd can affect your current buyback rate, and so can swapping out existing equipment. Joining ComEd’s virtual power plant program moves you onto an hourly pricing plan, which changes how you pay for and earn from energy.
- Should I join a virtual power plant? Enrollment can come with real incentives, and a real trade-off for backup. Our post on virtual power plants in Illinois lays out both sides before you decide.
- Who handles the utility side? Interconnection with ComEd takes time. Ask whether the installer submits the application, follows up through review and sees the project through to permission to operate (PTO), the utility’s approval to switch the system on.
- Will you tell me if storage is not right for my home? Sometimes the honest answer is a different approach, or that a battery is not the best investment right now. You want an installer willing to say so.
The Batteries Windfree Installs
Windfree Solar currently installs these battery systems:
If you are not sure which is right for you, that is normal. Part of the consultation is matching the battery to your existing inverter, electrical panel and backup goals.
The ComEd Details That Matter
Rockford is in ComEd territory, so ComEd’s rules shape how a battery fits into your bill. Two things are worth understanding before you add storage:
- Net metering. How your exported solar is credited depends on when your system registered and how your supply is priced. Our guide to ComEd net metering explains the rules new systems are on.
- Hourly pricing. Enrolling in ComEd’s virtual power plant program requires switching to ComEd’s hourly pricing, which changes how all of your solar exports are compensated, not only what the battery does.
Rockford has also hosted a ComEd pilot pairing solar with battery storage. We wrote about ComEd’s solar and battery project in Rockford when it was announced.
How any rebate or incentive applies to you depends on your situation. Check with your tax advisor. We don’t give tax advice.
What a Battery Consultation Covers
A battery storage consultation takes about 30 to 45 minutes. Our team reviews:
- How a battery would work with your existing equipment
- Whether any electrical upgrades or additional engineering are required
- Available incentives or utility programs
- The best battery solution for your home, daily energy needs and backup goals
For a deeper look at retrofits, see our guide to adding battery storage to your solar system.
Commercial Storage
If you own or manage a commercial property with solar, battery storage works on similar principles, but system sizing, utility rate structures such as demand charges, and incentive frameworks differ significantly. Windfree engineers commercial battery retrofits around a facility’s power requirements and peak demand patterns.
Why Homeowners Work With Windfree
Windfree Solar has installed 1,200+ systems across Illinois and the Midwest since 2009. We manage the full scope of every project: sales, engineering, permitting, procurement of materials, interconnection, inspection and permission to operate.
We are also a Solar Insure certified provider, which not every installer can be. On qualifying systems that means a 30-year warranty covering equipment and labor. For more on vetting any installer, read how to choose a solar company in Illinois.
Frequently Asked Questions
Can I add a battery to my existing solar system?
Often, yes. It depends on your current inverter, electrical panel and goals, which we review during the consultation, including on systems another company installed.
Will a battery power my whole house during an outage?
Our standard design aims for whole-home backup when feasible. Depending on your energy usage and system sizing, some large appliances may need to be managed during a long outage.
Does the battery charge from the grid?
No. It is designed to charge from your solar array.
Will a battery affect my ComEd buyback rate?
It can, depending on the rebates and incentives you take and whether equipment is swapped. We walk through this with you before you commit.
Do you handle the paperwork with ComEd?
Yes. We handle interconnection and see the project through to permission to operate.
Talk Through Battery Storage
Every home is different, and solar is custom. If you are in the Rockford area and thinking about a battery, contact Windfree Solar, email sales@windfree.us, or call 312-588-6953 to set up a battery storage consultation.
