Battery storage vs solar for commercial facilities

Usually because of the demand charge. Solar cut the energy (kWh) you buy, but a commercial electric bill also charges for your highest 15 minutes of power in the month, and that peak often comes in the late afternoon, at a startup spike or when shifts overlap, when the panels are making little. One cloudy afternoon is enough for the peak to come straight back, so that part of the bill hardly moves. A battery covers that peak.

How peak shaving works

Because they work on different parts of the bill. Solar reduces purchased energy while it is generating. A battery can cover peaks that solar misses and store surplus output for later use. It goes in beside the existing array, without changing it, and is planned around the array’s output. We review the existing system and its interconnection agreement as part of the design.

Either works. A battery does not need solar to cut a demand charge: it can recharge from the grid when demand is low. With solar on site, the battery also covers the cloudy and late afternoons and, where exporting earns little, stores the midday surplus. If you are planning both, the battery can go in first, typically 3–6 months from signing to running.

It sits alongside them, with its own rules. In Massachusetts, net metering treats a battery separately from the solar: it is not a net metering facility, so energy it sends out earns no net metering credit of its own. SMART can pay an extra energy storage adder when qualifying solar is paired with a battery that meets the state’s sizing and use requirements. In California, adding a battery is common under both NEM 2.0 and the Net Billing Tariff, where it can move midday solar to the evening. Each depends on your existing agreements, so we review your net metering, SMART or NEM paperwork before the design is final.

No to both. It is a commercial battery system, sized for a facility rather than a house, that sits on a pad or in an equipment room. QoreAI decides when it charges and discharges, and QoreControl runs it on site, to cut your demand charge. It works with or without solar.

Both. It can recharge from the grid when your demand is low, such as overnight, and from solar when the panels make more than the building uses. Either way it is planned to recharge below the peak it protects, so charging does not set a new one.

It is hard to know without a full analysis of your interval data and rate, and it varies a lot from site to site. As a rough first look, annual savings come to about 1–4 months of your electric bill. A full analysis gives you the real range before anything is proposed.

A battery. The demand charge is set by the single busiest interval of the month, often in the late afternoon. Solar helps when it is generating during the intervals that set billed demand. A battery can supply stored energy in those intervals, within its power and energy limits. Solar is better at cutting energy (kWh) charges, which is why the two work well together.

It depends on site work and utility requirements. EQORE battery systems are typically 3–6 months from signing to running, most of it design, permitting and utility interconnection. Solar's schedule grows with the array: structural review, racking and panels across the roof.