Electricity is one of the few genuinely predictable recurring costs in a cashew cutting operation. Unlike RCN price swings or labor availability, a motor’s power draw is fixed and its running hours are largely under your control, which means the electricity cost of cutting can be estimated with reasonable accuracy before you ever place an order. This is especially useful when comparing machines, since two cutting lines with similar throughput can carry very different running costs depending on motor size.
The Three Numbers That Drive the Calculation
Every electricity cost estimate comes down to three inputs:
- Motor power, in kilowatts (kW) — the rated draw of the machine’s motor, found on the nameplate or spec sheet.
- Operating hours — how many hours per day, and days per month, the machine actually runs.
- Electricity tariff — your local cost per kilowatt-hour (kWh), which varies widely by country, utility, and connection type.
Multiply the first two to get energy consumed, then multiply by the tariff to get cost. The formula is simple; the value of doing it carefully is in using real motor and tariff figures rather than rounded guesses.
Why Motor Power Matters More Than Head Count
A common assumption is that a bigger, higher-head-count cutting machine must draw proportionally more power. That is not how OUTTURN’s cutting line is engineered. The full range — 2, 4, 6, 8, 10, and 12-head machines — runs on a single 0.75 kW motor. Throughput scales by adding parallel cutting stations (cups and blade positions) that the same motor drives, not by installing a larger motor for each additional head.
The practical effect is a low kWh per 100 kg of raw cashew nut processed, especially on the higher head-count models, because the electrical draw stays fixed at 0.75 kW while output per hour climbs with head count. A processor comparing machines purely on rated capacity can miss this: two machines with similar throughput but different motor sizes will have meaningfully different running costs over a season, even though the sticker capacity looks similar. When you’re evaluating cutting equipment, ask for the motor’s kW rating alongside its capacity range — capacity without power draw is only half the cost picture.
A Worked Example
Here’s how the calculation runs in practice, using a placeholder tariff of $X per kWh — substitute your own local utility or generator fuel-equivalent rate.
Step 1 — Daily energy use. A machine with a 0.75 kW motor run for 8 hours a day consumes:
0.75 kW × 8 hours = 6 kWh per day
Step 2 — Daily cost. At a tariff of $X per kWh:
6 kWh × $X = $6X per day
Step 3 — Monthly cost. Assuming 26 operating days a month:
6 kWh × 26 days = 156 kWh per month 156 kWh × $X = $156X per month
Step 4 — Cost per 100 kg processed. If that 8-hour shift on a mid-range head-count machine yields, say, 400 kg of raw nut processed (this varies by head count and operator pace — check the rated capacity range for your specific model), the electricity cost per 100 kg works out to:
$6X ÷ 4 = $1.5X per 100 kg
Once you know your local tariff, plug it in for X and the whole chain resolves to real currency figures. The same four steps work for any motor size or shift length — just substitute your own kW rating, hours, and tariff.
Grid, Generator, or Solar-Supplemented Power
The tariff variable in the calculation above depends heavily on how a site is powered, and many cashew processing sites use more than one source.
- Grid power is usually the cheapest per kWh where it’s stable, but tariffs vary enormously by country and can include demand charges or time-of-use pricing that complicate a simple per-kWh estimate.
- Diesel or petrol generators almost always cost several times more per kWh than grid power once fuel, maintenance, and generator wear are factored in, making them a costly primary power source for continuous cutting operations, even though they’re a practical backup for outages.
- Solar-supplemented systems can meaningfully reduce the effective per-kWh cost of running cutting machines over the system’s lifetime, particularly for a steady, predictable load like a fixed-motor cutting line. Because OUTTURN’s cutting range holds power draw flat at 0.75 kW regardless of head count, it’s a comparatively easy load to size solar and battery capacity around.
For a detailed walkthrough of sizing a solar or hybrid system for a cashew factory, including how to build a full site load table and think through battery storage and payback timing, see our guide on solar power systems for cashew processing factories.
Putting the Estimate to Work
Once you have a real tariff figure for your site, the same four-step calculation lets you compare running costs across shift lengths, machine counts, or head-count models before committing to a purchase. Because OUTTURN’s motor power stays constant across the range, scaling this estimate from a single 2-head machine to a multi-line 12-head installation is mostly a matter of multiplying by the number of machines running, not re-deriving the whole calculation from scratch.