Battery Application Solutions for Recycling Centre: Peak Shaving and Backup

A materials recovery facility has one of the spikiest load profiles in industry. Conveyors run steadily, but shredders, balers, and granulators hammer the connection with short high-power draws, and the site is usually billed on the highest fifteen-minute demand of the month. Purpose-built battery application solutions absorb those spikes, flatten the demand curve, and keep the sorting line turning when the feeder trips.

The Demand-Charge Problem

Two facilities can consume identical energy and pay very different bills, because one draws it evenly and the other draws it in bursts. A baler that pulls 90 kW for ninety seconds sets the monthly demand charge even though it only used two kilowatt-hours. Storage sized to cover those bursts — sometimes only 100–200 kWh — can cut the demand component by a third, which is often the fastest payback available on the site.

Which Loads Benefit

Not everything needs battery support. Priority goes to the shredder and baler motors, the optical sorters that must not lose calibration, the eddy-current separators, and the site IT and weighbridge. Lighting and office loads are better served by the grid. Walk the site with a logger for two weeks before specifying anything; the measured profile almost always differs from the one the plant manager describes.

Recycling Site Storage Comparison

Handling Dust and Vibration

Recycling sites are dirty and they shake. Paper dust and fines infiltrate anything not properly sealed, and the baler transmits vibration through the slab. Specify an IP65 enclosure with filtered positive-pressure ventilation, mount it on anti-vibration feet away from the baler foundation, and keep the air intake on the clean side of the building. Cable entries belong on the underside of the cabinet, never the top. Plan a wash-down routine for the intake louvres as well, and put it on the same maintenance schedule as the baler, because an ignored filter fails silently until the bank overheats on the hottest day of the year.

Integration With Sorting Controls

The value of peak shaving depends on the battery knowing when a surge is coming. Modern balers and shredders can send a pre-start signal over Modbus or a simple digital input, letting the bank pre-emptively take the load instead of reacting to it. Where that signal is not available, the controller can usually detect the ramp well within a second. Either way, agree the interface with the equipment maker before the battery arrives on site.

What to Ask a Supplier

Ask for a demand-charge model built on your logged fifteen-minute data rather than an estimate. Confirm the enclosure rating, whether the controller accepts a pre-start signal from your baler, and how the warranty treats a site with heavy vibration.

People Also Ask

How much battery does peak shaving need? Usually 100–250 kWh for a mid-sized facility — far less than full backup would require, because you are covering minutes, not hours.

Will it also run the site during an outage? Only if sized for it. Peak-shaving banks are typically too small for long outages unless you specify a reserve.

Does dust really matter? Yes. Paper and plastic fines clog filters and intakes quickly; an undersized filtration arrangement is the most common cause of premature shutdown on these sites.

Can it talk to our existing baler? Usually, via Modbus or a dry contact pre-start. Confirm the protocol with the baler manufacturer before ordering.

Written by Karl at China Battery Technology. Request a quote.