MainstayTalk to us

A lower electric bill.
Power that stays on.

We install a battery at your business for a small setup fee. It cuts your demand charge from month one, and keeps you running through outages if you want backup. We'd like to work with you on what makes sense for your site.

What's a demand charge?
Commercial bills have two parts. Energy — what you used. Demand — a monthly charge based on your single highest 15-minute draw of the month.
For a typical small business in NJ that's thousands a year for a quarter hour you can't tell apart from any other. A battery covers the spike, so it never registers on your meter.
What we do
When your demand spikes — a compressor kicking on, a busy lunch rush — the battery covers it. The grid never sees the peak, and you don't get billed for it.
the spikewhat you pay
How it works
01
You send us a recent utility bill.
We pull your peak kW, your tariff, and your usage curve. We come back with a sizing and a savings number in a day.
02
We handle the install for a small setup fee.
We size the system, handle permitting and interconnection, and put it on your wall. As fast as we can get to you.
03
Your bill drops on month one.
A meaningful cut to your demand charge from day one. We may charge a small subscription on top — the net is still well below what you pay today. No incentive programs required.
Rough math
Your peak
120kW
You pay now
$2,160/mo
You save
$648/mo
Slide to your peak draw$7,776/yr saved
20 kW300 kW
NJ baseline · $18/kW · 30% conservative shave · numbers are an estimate
Talk to us

Send us a utility bill.
We'll send back a number.

One PDF. A site-specific proposal — sizing, savings, install timeline — back in a day.