Generator size
calculator.

Estimate your requirement, then explore a generator package
from our fleet—with optional one-set redundancy.

Input unitsTotal simultaneous running load (kW)

Line-to-line voltage (V)

Enter the current in one line conductor, assuming the same current on all three phases. Do not add the three currents together. Use your supply’s line-to-line voltage, not its phase-to-neutral voltage. Unequal phase loads need a separate assessment by our team.

Assumed power factor

Use the value supplied for your equipment. 0.8 is an illustrative starting assumption.

Planning headroomAdd one-set redundancyEnough generator capacity to cover the requirement with one set unavailable.

Fleet sizes: 20, 40, 60, 115, 220 and 330 kVA. Synchronised packages use two or three matching sets of 60 kVA and above.

INITIAL PLANNING ESTIMATE

30.0kVA

20 kW ÷ 0.8 power factor, plus 20% headroom.

Recommended generator package

1 × 40 kVA

40 kVA total installed capacity.

Starting currents, phase balance, transient loads, harmonic loads and environmental derating are not included. Recommendations show the minimum matching set count for each fleet size, prioritising fewer sets then the smallest combined capacity. Redundancy checks remaining capacity only; it does not guarantee uninterrupted transfer. Our team must confirm controls, load behaviour, site requirements and availability.

Enquire about this package

LET’S GET YOUR SITE CONNECTED

Plan your power requirements.

Send your load list, dates and site details to discuss generators, distribution, cabling and fuel.

Discuss your power requirements

SOUTH COAST HIRE GROUP

Power at our core.
People behind it.

Temporary power and event production, brought together by one team. From generator hire to staging, sound and lighting, we help turn your plans into a working event.

More about our approach