Plan construction-site diesel generator loads, starting current, duty rating, ATS needs, and site conditions before requesting a quotation.
What buyers should know first
Construction sites rarely have one steady electrical load. Tower cranes, hoists, pumps, welders, batching equipment, lighting, site offices, and temporary accommodation can start and stop at different times. A diesel generator set should therefore be selected from a load schedule, not only from the largest machine nameplate.
Before requesting a quotation from Yangzhou Tesla Power Equipment Co., Ltd., prepare the expected running load, the largest motor-starting load, the voltage and frequency required on site, and whether the set will run as prime power or standby power. These details help the supplier recommend a practical kW/kVA range, enclosure style, alternator capacity, and control arrangement.
Load details that change the generator selection
| Item to confirm | Why it matters | What to send with the RFQ |
|---|---|---|
| Running kW or kVA | Sets the continuous output requirement. | Load list with expected simultaneous operation. |
| Largest motor start | High inrush can require extra alternator capacity. | Motor kW, starting method, and start sequence. |
| Prime or standby duty | Construction projects often need long daily runtime. | Expected hours per day and load variation. |
| Voltage and frequency | Export projects may need 50Hz or 60Hz configuration. | Voltage, phase, frequency, and destination market. |
| Noise and dust conditions | Can affect enclosure, filtration, and maintenance access. | Open, silent, or containerized preference plus site photos. |
In practice
Many construction RFQs are delayed because the buyer asks for a generator size before confirming how cranes, pumps, and welding machines will be started. If several motors start together, the selected set may need a stronger alternator or a staged-start control plan. If the generator is too small, voltage dip can interrupt equipment; if it is oversized, fuel use and light-load operation become concerns.
For a temporary project, also confirm whether the set will move between sites. Lifting points, trailer mounting, weather protection, cable routing, grounding, and service access should be discussed before the purchase order, not after delivery.
What to request in the quotation
- Rated prime and standby output in both kW and kVA.
- Engine brand and model, alternator brand, controller model, and breaker rating.
- Fuel tank capacity and assumed runtime at stated load.
- Noise expectation if a silent or soundproof canopy is required.
- ATS, auto-start, remote monitoring, or synchronization options if needed.
- General arrangement drawing, wiring diagram, and maintenance access notes.
Internal references worth checking
For load calculation, compare this project with the site article on how to size a diesel generator for industrial backup power. For running-duty assumptions, review prime vs standby diesel generator ratings. A related product example is the Cummins engine 100kW to 400kW diesel generator set with ATS options.
Common questions before quotation
Should a construction site generator be sized by total installed load?
No. Total installed load is useful, but the practical selection should use simultaneous running load, starting current, and the sequence in which equipment will operate.
Is prime rating more relevant than standby rating for construction?
Usually yes when the site has no reliable grid supply and the set runs for many hours each day. Confirm the duty cycle before comparing models.
When is a silent canopy needed?
Use a silent or soundproof set when the project is near offices, residences, hospitals, or night-work restrictions. Noise targets should be stated in the RFQ.
What documents should the purchaser request?
Ask for a technical data sheet, configuration drawing, controller description, electrical diagram, packing information, and operation and maintenance documents.
Can one generator serve cranes and site offices together?
It can, but the supplier should check motor starting, voltage dip, load balance, and whether sensitive office equipment needs separate protection.