Own the system.
Buy the equipment and keep the project economics. Your proposal sets who installs, operates, and maintains the system.
Lower electricity costs.
Backup power
where it matters.
Mainstay designs commercial battery systems from your electricity use, operating schedule, and backup requirements. You can buy the equipment or use financing.
Plan your system.
Select an exact match. No bill or account needed.
How the system operatesIllustration, not live system data
Use stored power during your busiest hours.
A battery can reduce the power your building draws from the grid. Your tariff and usage determine how that affects your bill.
Grid data at your address
See the records
at your address.
Your utility, rate schedule and electricity use affect whether a battery makes sense. See the public records used to start a system plan.
View grid data
EIA and HIFLD records. Map context, not a connection-capacity assessment. Sources
Ownership & financing
Ownership and financing
for your project.
Tell us about your projectWorking with Mainstay
Design, installation
and operation.
Mainstay prepares the system plan, coordinates installation, and arranges operation and maintenance. Your proposal names the equipment, project partners, and responsibilities.
The operating plan accounts for your electricity costs and the equipment that must keep running. A qualifying site may also be able to participate in a grid program.
Discuss your projectBefore you start
Before you choose a battery.
What does a commercial battery do?
It stores electricity for later use. Depending on your tariff and load, it can reduce peak grid demand or shift when you buy electricity. A system designed for backup can also support selected equipment during an outage.
Can it keep my whole building running in an outage?
That depends on the equipment, load and duration. We start with what needs to keep running. Backup requires suitable transfer and protection equipment, and may cover selected circuits rather than the whole building.
Can I buy or finance the system?
You can buy the equipment or use financing. Your written proposal sets payment terms, eligibility, operating responsibilities, and any performance commitments.
Start with
your address.
Plan your systemWe currently serve PJM. For projects elsewhere, contact us.