Motor energy comparison
Compare annual energy for the same shaft duty at two efficiencies, using your hours, tariff and installed replacement cost.
Enable JavaScript for live calculations. Read the method and default example below.
Method and assumptions
- Both motors deliver the same shaft duty. Use efficiency at this load, not an unrelated nameplate point.
- Tariff is your scenario input, not a published utility rate.
Before using the result
- Simple payback excludes finance, maintenance, downtime and tariff changes. Negative difference means higher operating cost.
Worked example
Illustrative default inputs. Enter your project values above.
- Rated shaft power
- 30 kW
- Shaft load
- 75 %
- Existing efficiency at duty
- 88 %
- Replacement efficiency at duty
- 93 %
- Annual running hours
- 4000 h
- Energy tariff assumption
- 25 KES/kWh
- Installed replacement cost
- 150000 KES
Default results
- Existing annual energy
- 102,272.7 kWh
- Replacement annual energy
- 96,774.2 kWh
- Annual cost difference
- 137,463 KES
Choose a reference or send your BOQ
Compare relevant product families, then confirm the exact rating, control supply and duty. Price and availability are confirmed with your enquiry.
Technical references
These references support planning. The exact model documentation and a project-specific engineering review govern the final specification.