When a buyer asks "what is the power consumption of your fruit net machine?", the honest answer is never a single number-it depends on machine type, screw diameter, and whether you quote installed power or real running load. For a typical EPE/LDPE extrusion fruit net machine, the real-world draw is 10–18 kWh per hour of operation, which translates to 200–500 kWh per ton of finished net. A 75 mm EPE foam fruit net machine rated at 40 kW installed actually runs around 12–15 kWh/h once PID heaters cycle and VFD drives trim idle load.
Installed Power vs Running Load
Suppliers love to print "installed power" on spec sheets because it looks impressive. A Φ65 mm LDPE/PP knotless fruit net machine is listed at 35 kW installed; a Φ75 mm EPE foam net machine at 40 kW installed. But heaters (15–20 kW of that total) do not run at 100% continuously-they pulse to hold barrel temperature. The main motor (7.5–11 kW), traction, pump motors, and cutter add steady draw, but VFD control drops them during warm-up and speed changes. Net result: real running load = 30–45% of installed power for foam-net lines, slightly higher for solid LDPE/PP net lines because there is no foaming-agent pump load offset.
Consumption by Machine Size
Screw / TypeInstalledReal Draw (kWh/h)Output (kg/h)kWh/ton
Φ50 mm LDPE net25 kW8–1010–12~800
Φ65 mm LDPE/PP net35 kW12–1520–30500–750
Φ70 mm EPE foam net32 kW11–1320–25480–650
Φ75 mm EPE foam net40 kW12–1525–40350–500
Φ80 mm LDPE net50 kW18–2230–40500–700
High-efficiency VFD + recovered-heat models push kWh/ton down to 200–300 kWh; older fixed-speed machines sit at 550–750 kWh/ton.
How to Convert That Into Cost
Take a Φ75 mm fruit net machine making 30 kg/h at 13 kWh/h. At an industrial rate of USD 0.12/kWh:
Hourly electricity = 13 × 0.12 = USD 1.56/h
Per kg net = 1.56 ÷ 30 = USD 0.052/kg
Per ton = USD 52/ton
That is 6–8% of total production cost-far behind LDPE resin (which is 70–80%), but still the second-largest utility line after labor if you run 6,000 h/year (annual power bill ≈ USD 9,360).
What Drives Consumption Up
Five things inflate a fruit net machine power bill:
Fixed-speed motors instead of VFD-idle draw stays high.
Barrel temperature set too high-every 10 °C over optimum adds ~3% heater duty.
Open cooling instead of closed-loop tower-water pump runs longer.
Running below rated output-kWh/ton rises because fixed heater load is spread over fewer kg.
Dirty screw or blocked filter-motor amps climb to push the same melt.
Buying Tip
Always ask the supplier for two numbers: installed power (for transformer/cable sizing) and measured kWh/h at your target output (for ROI). A credible fruit net machine maker will hand you a 24-hour run log showing 280–300 kWh over 24 h with 500–1,200 kg output-that is the data you plug into your cost model, not the nameplate.
In short, budget 12–18 kWh/h for a standard commercial fruit net machine, expect 300–500 kWh/ton on a decent VFD line, and treat anything above 600 kWh/ton as a red flag for outdated heating control.