Sizing against the actual peak, not an estimate
Demand-charge reduction only pays back if the battery is sized against a site's real interval data, and sourcing here starts from that peak demand profile rather than a rule-of-thumb kWh figure.
Industries
Demand Charge Management
Battery and control equipment sized to a site's actual peak demand profile, where the payback math lives or dies on accurate sizing.
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Demand Charge Management
Source storage and control equipment sized to peak demand charges. Commercial demand management equipment sourcing built for accurate payback math.
Storage sized to shave demand charges
Control systems that actually shave the peak
A battery without the right control logic will discharge at the wrong moment, missing the peak it was sized to shave. Equipment here is evaluated on control sophistication, not just capacity.
Paired with solar where it helps, standalone where it doesn't
Some demand-charge problems are better solved by standalone storage than a solar-plus-storage system, and sourcing here doesn't force a bundle where a site doesn't need one.
What changes on demand-charge payback
Size against real interval data
Battery capacity ties to actual peak demand instead of a generic estimate that misses the payback target.
Get control logic that matches the tariff
Control systems get evaluated against how well they actually respond to the site's demand charge structure.
FAQs
How is battery storage sized for demand charge reduction?
Sizing starts from the site's actual interval demand data, not a nameplate estimate, so you can see how high and how long each peak runs. The battery's power rating has to cover the peak reduction you want, and its energy capacity has to sustain that reduction through the full duration of the peak. Getting both right against real load data is what makes the demand-charge payback work, which is why Sunhub sizes equipment against the measured peak profile.
What's the difference between peak shaving and backup power sizing?
Peak shaving sizes the battery around your recurring demand peaks, discharging briefly and often to trim the highest points of the load curve and cut demand charges. Backup power sizes around riding through an outage, which usually means more energy capacity to carry critical loads for hours. A system tuned for one is rarely optimal for the other, so define the goal before you size.
Does demand charge equipment need a separate control system from the main inverter?
Often yes. Effective peak shaving depends on control logic that watches real-time demand and dispatches the battery against the specific tariff, which frequently sits in a dedicated energy management controller rather than the base inverter firmware. Some inverter platforms include this natively, but many do not, so confirm the control capability before you commit to hardware.
