Behind-the-Meter Battery Storage

A stand-alone Battery Energy Storage System (BESS) installed by Sievert Electric can lower your electric bill by reducing demand charges, qualify for Illinois and federal tax incentives, and earn ComEd utility rebates. It can even generate revenue through wholesale and ancillary services provided to the grid. Best of all? These incentives and benefits can cover almost the entire cost of the project.

Why Install a Battery on Your Commercial Property?

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Just send us your electric bill and we’ll create a custom system with recommendations specific to your property’s needs. It’s that easy.

Behind-the-meter storage is simply a battery system installed on the customer side of your electric meter, typically tied into your main electrical service or switchgear.

Instead of sitting out on the utility’s grid, a BTM battery lives “inside” your facility:

• It charges from the grid during off-peak or lower-cost hours.
• It discharges into your building during expensive peak hours or when the grid is stressed.
• It can also provide backup power for critical loads during an outage, depending on how it’s designed.

Technically, most commercial BTM systems are a battery energy storage system (BESS): lithium-ion battery racks, a bidirectional inverter, controls, protective relays, and a smart controller that decides when to charge and discharge. These systems can sit in a dedicated electrical room, a mechanical space, or in an outdoor container on a pad—whatever fits your site and code requirements.

Benefits for Commercial Property Owners

For a commercial property owner in Illinois, a properly designed BTM battery can create value in several ways at once.

1. Lower Demand Charges and Capacity Costs

Commercial electric bills in ComEd and Ameren Illinois territory usually contain demand charges—fees based on your highest kW draw in a billing period, plus capacity charges tied to how hard you pull on the grid during regional peaks.

A BTM battery can:

• Shave your peaks by discharging during those “spike” moments when your building’s load surges.
• Reduce your billed demand (kW) and capacity tag, which can translate into meaningful, recurring savings on every bill.

Over a year, this can add up to tens of thousands of dollars for mid-size and large facilities, especially those with intermittent high loads (manufacturing, cold storage, event venues, big HVAC or process loads).

2. Hedge Against Volatile Energy Prices

As Illinois transitions the grid and adds more renewables, time-based rates and pricing volatility are becoming more common. Charging your battery when prices are low and discharging when they’re high is called energy arbitrage.

For you, that means:

• More control over your cost per kWh, instead of just passively riding whatever the utility and market give you.
• The flexibility to pair storage with future time-of-use (TOU) or hourly pricing programs and squeeze more value out of smart rate design.

3. Backup Power and Resilience

Depending on how Sievert Electric designs the system, your BTM battery can also:

• Support critical loads (IT rooms, life-safety systems, refrigeration, elevators, emergency lighting, etc.) during outages.
• Provide smooth ride-through for short disturbances that might otherwise trip sensitive equipment or cause costly downtime.
• Integrate with existing or planned generators, UPS systems, or microgrids for a layered resilience strategy.

Instead of thinking of storage as “just a bill-saver,” you get a resilience asset that protects revenue and operations when the grid has problems.

4. Future-Proofing Your Building

BTM storage is also a way to future-proof your property:

• It prepares your electrical system for EV charging, electrified heating, and other load growth.
• It lays the foundation to add solar later without a major redesign.
• It improves your building’s sustainability profile, helping with ESG goals, tenant expectations, and corporate reporting.

In many cases, adding storage is a faster and cheaper way to manage new load than upgrading utility service or rebuilding the entire electrical backbone of the building.

Illinois-Specific Benefits and Incentives

In addition to the operational benefits, Illinois offers a uniquely strong set of financial incentives and policy support for commercial BTM batteries—especially in ComEd territory.

Here are some of the high-level benefits available as of 2026:

• ComEd and Ameren distributed generation and storage rebates.
• Federal investment and clean electricity tax credits for storage
• Extra value if you add solar in the future
• Demand response and grid services revenue.

Sievert Electric can help you evaluate whether a BTM battery makes sense for your specific building, design a code-compliant system that integrates cleanly with your existing infrastructure, and guide you through the incentive and interconnection process from start to finish. All we need to start is a copy of your electric bill.