Power planning for an outdoor event starts with adding up your total load: lighting, sound, catering equipment, and aircon tentage if used. Most venues without mains access need a generator sized with 20-30% headroom above your calculated load. Getting this wrong causes trips and blackouts mid-event, usually right when the sound system or aircon is running hardest.
How do you calculate power load for your event?
- List every powered item. Lighting rigs, sound system, LED screens, catering warmers, and aircon tentage units all draw different loads.
- Check the wattage of each item. Your vendors (AV company, caterer) should be able to provide this for their equipment.
- Add it all up, then add 20-30% headroom. This buffer covers startup surges, especially from motors and compressors in aircon units.
- Confirm your power source. Mains access at the venue, or a generator sized to your total calculated load.
- Plan cable runs and distribution. Confirm how power reaches each vendor station without cables crossing walkways or getting wet.
Do you need a generator or can you use mains power?
| Venue type | Typical power source |
|---|---|
| Void deck / HDB common area | Mains access often available, confirm with town council |
| Park / open field | Usually needs a generator |
| Private club / hotel grounds | Mains access typically available on request |
| MSCP rooftop | Depends on building, often needs generator backup |
Even where mains access exists, confirm the circuit’s capacity before committing. Older buildings sometimes have lower capacity than a large event setup needs.
What safety precautions matter most for outdoor event power?
Keep cables off walking paths or covered with cable ramps, ensure all outdoor sockets are rated for wet conditions, and confirm your electrician or AV vendor has proper certification. Aircon tentage in particular draws significant continuous load, so it should always be on its own dedicated circuit or generator line, not shared with lighting and sound.
The most common mistake we see is underestimating aircon tentage load specifically — a single unit can draw as much as all your other event equipment combined, and tripping it mid-event on a hot afternoon is a fast way to lose guest comfort.
How much does generator rental typically cost in Singapore?
Small generators for basic lighting and sound run roughly SGD 200-400 for a half-day event. Larger generators capable of running aircon tentage and full AV setups can run SGD 600-1,500 depending on capacity and rental duration. Confirm whether fuel and an operator are included in the quoted price.
FAQ
Can my event run entirely on generator power?
Yes, this is common for outdoor events without mains access, provided the generator is correctly sized for your total load with adequate headroom.
How do I know if aircon tentage needs a separate power source?
Almost always yes for anything beyond a small unit. Ask your tentage supplier directly what circuit or generator capacity their aircon units require.
What happens if the power trips during my event?
A properly sized generator with headroom rarely trips, but if it does, a good crew can reset it within minutes. This is why headroom matters more than exact load matching.
Do I need a licensed electrician for outdoor event power?
For anything beyond basic lighting, yes — a licensed electrician or experienced AV vendor should handle wiring and distribution for safety and code compliance.
Is generator noise a problem for events near residential areas?
It can be, particularly for void deck events. Ask your generator supplier about noise-reduced or enclosed units if your venue is close to residential blocks.
How do you plan power for events with multiple vendors?
Get each vendor’s power requirements in writing before the event, not verbally on setup day. AV companies, caterers, and lighting vendors often underestimate their own draw, especially when equipment is added last-minute like extra spotlights or a second warming station.
Assign specific circuits or generator outputs to each vendor zone, and share this plan with your tentage crew so cable runs are planned into the layout from the start rather than added around finished furniture placement.
What questions should you ask your generator supplier?
Confirm the generator’s kVA rating, whether fuel and refuelling during the event are included, noise levels if near residential areas, and who to call if it trips or runs low on fuel mid-event. A generator supplier separate from your tentage company should coordinate directly with the setup crew beforehand.
Your next step
If your event needs aircon tentage or heavy AV equipment, flag your power requirements when you request a quote so we can plan the right setup from the start.
