Compare configuration, lead time, condition, documentation and whole-life support when choosing a generator. This guide supports early planning; the final generator and electrical installation should be checked against the actual equipment, site conditions and duty.
When new suits the project
A new set is appropriate when controls, enclosure, emissions, dimensions, fuel autonomy or acoustic performance must be configured around a defined design.
When used can add value
A suitable used set may offer strong value and a shorter route to delivery. Rating, age, hours, condition, controller, breaker and documentation all need review.
Inspection and testing
Look beyond appearance. Engine, cooling, fuel, starting, alternator, controls and safety systems should be checked, followed by testing appropriate to the intended duty.
Compare equivalent ratings
Confirm whether each quoted figure is prime or standby and whether it applies at the required voltage, frequency and environmental conditions.
Budget for the whole project
Include delivery, off-loading, foundations, fuel, exhaust, cabling, switchgear, commissioning, servicing and future parts support.
Define non-negotiable requirements first
Before comparing prices, identify the required duty rating, voltage, frequency, phase, controller functions, emissions constraints, enclosure, footprint and delivery route. This quickly shows whether a configured new set is necessary or whether current used stock can meet the brief without unsuitable compromises.
Assess used equipment consistently
Ask for the engine and alternator identities, serial numbers, stated hours, year, controller, breaker, service information and test evidence. Inspect for leaks, corrosion, coolant or oil condition, damaged wiring and incomplete safety guards. Recorded hours are useful but do not describe loading history or maintenance quality on their own.
Compare whole-life outcomes
Warranty, parts availability, lead time, modification work, transport, installation and future servicing belong in the comparison. A lower purchase price is not a saving if the set needs extensive adaptation or cannot support the required duty. Conversely, a well-matched used generator can be a practical and economical solution when it is properly assessed and prepared.
Information to send with an enquiry
Share the site location, required voltage and phase, intended prime or standby duty, expected running hours and a schedule of the equipment to be powered. Include motor starting methods, UPS or variable-speed-drive data, the largest load step, fuel-runtime target, noise constraints and the proposed installation position where known. Photographs, electrical drawings and measured load information help the team distinguish firm requirements from early assumptions. FW Power can then discuss an appropriate generator, control arrangement, delivery, installation, commissioning and ongoing service scope without treating a guide calculation as a finished design.