Generator Fuel Cost Calculator
South West Tech — what your genset really costs, and what solar + batteries would save
Auto fuel estimate uses the standard diesel curve: L/h ≈ 0.246 × load kW + 0.084 × rated kW — covers idle burn plus load burn.
— $/kWh generated
| Fuel burn | — |
| Litres per day / year | — |
| Fuel cost — weekly / annual | — |
| Servicing cost per year | — |
| Total annual running cost | — |
Add solar + batteries
Runtime reduction
92%
| Generator hours after hybrid | — |
| Saving — first year | — |
| 10-year saving (flat prices) | — |
| 10-year saving (with price rises) | — |
Guide only — fuel burn varies with engine, condition and altitude; check your genset's consumption chart for accuracy. Default escalation of 6%/yr reflects Australian retail diesel's compound rise over the past decade (121c/L in 2015–16 to ~220c/L in 2026, ACCC/AIP data); servicing escalates at CPI (~3%/yr). Well-designed hybrid systems in western QLD typically cut generator runtime by 90–95%, extend engine life and reduce servicing trips. Doesn't include oil, engine rebuilds or fuel cartage — the real savings are usually bigger. South West Tech — 0488 224 284.