virtual power plant graphic

How Are Commercial Buildings Turning Peak Demand Into Revenue With Virtual Power Plants?

Charging Tech & Innovation
September 29, 2026•5 min read

A wave of new utility and technology partnerships is making it turnkey for a building to sell its flexibility back to the grid. Done right, it converts an energy cost center into a second income stream.

By Keith Reynolds | Publisher & Editor, ChargedUp!

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The answer: By enrolling their controllable loads and batteries in a virtual power plant, which pays them to reduce or shift electricity use when the grid is under stress. A virtual power plant (VPP) is a network of many buildings, batteries and flexible loads that a software platform coordinates to act as a single power resource. New tie-ups, including a Siemens and Voltus partnership announced this week, plus utility programs from PG&E and ComEd, are removing the technical barriers that once kept commercial owners out. The payoff is twofold: lower peak demand charges and a recurring demand-response payment.

Key Facts at a Glance

  • Siemens and Voltus announced a partnership this week to integrate Siemens Peak Demand Limiting building controls with Voltus's virtual power plant platform, targeting commercial real estate, higher education and government.

  • The integration lets buildings automatically curtail load during grid events, cutting demand charges and earning demand-response revenue without manual intervention.

  • Pacific Gas and Electric launched a virtual power plant program enrolling customer batteries and flexible loads as a dispatchable grid resource.

  • ComEd received Illinois regulatory approval for its first virtual power plant program, set to launch for customers in 2027.

  • A controllable load or battery of roughly 100 kilowatts can generate meaningful annual non-rent revenue, turning flexibility into income while protecting the building during outages.

What Is a VPP, and How Does a Building Earn From It?

A virtual power plant aggregates the flexible energy resources inside many buildings, rooftop solar, battery storage, smart HVAC and EV charging, into a single network that a cloud platform dispatches. When the grid approaches peak stress, the platform signals enrolled buildings to reduce or shift their electricity use, and the grid operator pays for that flexibility as if it were a power plant.

For a commercial owner, the value arrives on two lines. The first is expense reduction. Automated load shifting trims the coincident peak demand that sets a building's monthly demand charge, often the largest and least understood line on a commercial electric bill. The second is revenue. Aggregators pay owners capacity credits and event payments to dispatch stored battery energy or curtail flexible load during grid stress. Energy shifts from a volatile cost into a contracted, recurring inflow.

What Changed This Week?

The barrier to VPP participation has been technical integration, and it is falling. This week Siemens and Voltus announced a partnership to link Siemens Peak Demand Limiting building controls with Voltus's virtual power plant platform. The combined system lets a building automatically adjust HVAC settings and cycle equipment in response to grid signals, capturing demand-charge savings and demand-response revenue without a facility manager intervening. Siemens directed the offering at commercial real estate, higher education and state and local government, the sectors carrying the heaviest energy loads.

These events are significant because participation no longer requires a custom engineering project. When the building automation system and the market platform speak to each other through automated interfaces, a property manager can enroll and earn without rewiring how the building runs.

Where Else Is This Expanding?

Utilities are building the programs that pay for this flexibility. Pacific Gas and Electric launched a virtual power plant program that enrolls customer batteries and flexible loads as a dispatchable resource. In Illinois, ComEd received regulatory approval for its first virtual power plant program, set to launch for customers in 2027 under the state's clean energy law. As more utilities stand up these programs, the market where a commercial building can monetize its flexibility widens from a handful of regions to much of the country.

What Risks Must Owners Manage?

The revenue is real, and so are the failure modes. Four deserve attention before signing an aggregator agreement:

  • Tenant comfort: Overly aggressive load-shedding sent to a building's HVAC system can degrade indoor conditions and spark tenant complaints or lease disputes, so any contract needs firm override thresholds that protect occupied space.

  • Battery wear: Frequent cycling during grid events accelerates degradation, and a poorly structured agreement can exhaust a battery's useful life before it pays back. Third,

  • Lender consent: Grid-tied equipment and any associated financing should be disclosed to the senior lender to avoid friction at refinancing. Fourth,

  • Life Safety: A VPP contract should guarantee that the building retains critical backup power for elevators, data and emergency systems during a local outage, regardless of grid signals. Managed with those guardrails, VPP participation adds income without compromising the building's core job of serving its tenants.

Frequently Asked Questions

Is VPP revenue reliable enough to underwrite?

Capacity payments are typically contracted in advance, which makes a baseline predictable, while event-based payments vary with grid conditions. Owners should underwrite the contracted capacity component conservatively and treat event revenue as upside rather than a guaranteed line.

Will participating hurt my tenants?

Only if the contract allows it. A well-structured agreement sets override thresholds that protect occupied space and critical systems, limiting curtailment to loads that do not affect comfort or safety. The controls automate this, so the building stays within agreed limits.

Do I need batteries to participate?

Not always. Buildings can provide flexibility by curtailing or shifting loads such as HVAC and lighting through building controls alone. Batteries increase how much a building can offer and when, but flexible load management is a starting point that requires no storage investment.

Sources

virtual power plantdemand response revenuedemand chargeSiemens VoltusComEd VPPbuilding flexibility
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