To work out how many kVA your wedding genset needs, size it by guest count and total load. Rough guide: a small function (under 200 guests) needs 10–20kVA, a mid-size one (200–500) needs 20–40kVA, and a large event or fully air-conditioned canopy setup needs 40–100kVA+. Choose a silent genset for functions, and always confirm against a real load list before you book.
A genset that is too small will trip the moment everything switches on at once; one that is too big wastes rental cost and diesel. The key to getting the size right is calculating your actual load, not guessing.
How many kVA genset for a wedding by guest count?
As a rough rule, the more guests you have, the more canopies, lights, fans and PA you run — so the kVA rating scales up with the size of the function.
The estimates below are only a starting point. Your real load depends on whether you use ordinary fans or air conditioning, how many electric catering pots you run, and how powerful your sound system is.
For exact figures, prepare a list of every electrical item (your load list) and contact us for a quote — we will help you do the maths.
- Under 200 guests (small function, lights + fans + basic PA): around 10–20kVA
- 200–500 guests (mid-size canopy, deco lighting, full PA): around 20–40kVA
- 500+ guests or a fully air-conditioned canopy: around 40–100kVA+
- It is safer to pick a size slightly larger than your peak load (roughly 20–30% buffer)
| Function scale | Guests | Estimated kVA |
|---|---|---|
| Small | < 200 | 10–20kVA |
| Mid-size | 200–500 | 20–40kVA |
| Large / air-conditioned | 500+ | 40–100kVA+ |
What draws the most power at a function?
Air conditioning and electric catering equipment are the biggest power draws by far, well ahead of lights and PA.
LED lights and sound systems are usually light loads, but once you add an air-conditioned canopy, chillers, or an electric kitchen, the load can jump several times over.
That is why an indoor air-conditioned function always needs far higher kVA than an open canopy event running on fans.
- Air conditioning / canopy cooling: highest load, pushes kVA up significantly
- Electric catering (chafing dishes, kitchen, chillers, fridges): heavy load
- Deco lighting & stage lights: moderate, depends on the number of points
- PA system & DJ: usually light, but with a power surge on startup (starting load)
- Industrial fans / canopy blowers: moderate, multiply by the number of units
| Load type | Power level |
|---|---|
| Air conditioning | Very high |
| Electric catering | High |
| Deco lighting | Moderate |
| PA / fans | Low–moderate |
How do you calculate the function load correctly?
The most accurate method is to add up the power (watts or kVA) of every item that will run at the same time, then add a safety buffer.
List each item — lights, fans, PA, catering pots, air conditioning — and total their power ratings. Items with motors, such as air conditioners and blowers, have a 'starting load' higher than their normal reading, so leave extra headroom.
Once you have the total peak load, add about 20–30% on top so the genset is not running at maximum capacity all night. Send us your load list and we will confirm the right size.
- Step 1: list every item that runs at the same time
- Step 2: total the power (check each item's label/spec)
- Step 3: leave extra headroom for motor starting load (AC, blowers, chillers)
- Step 4: add a buffer of about 20–30% to the peak load
- Step 5: confirm with an expert — contact us for a quote
| Item | Power note |
|---|---|
| Lights / deco | Total by number of points |
| AC / blower | Count a higher starting load |
| Catering | Every electric pot is heavy |
| Buffer | Add about 20–30% to the total |
Should you choose a silent genset for a wedding?
Yes — for weddings and events, a silent (soundproof) genset is strongly recommended so engine noise does not disturb the speeches, PA and atmosphere.
Canopy/silent gensets are built with soundproofing so they run much quieter than open-type units. This matters when the genset has to sit fairly close to the guest area or the dais.
We supply silent units from 20kVA–500kVA+, DOSH certified, with same-day delivery in Peninsular Malaysia (Sabah/Sarawak/Labuan subject to availability). Contact us to check units and get a quote.
- Silent / soundproof genset = far lower engine noise, suited to a function setting
- Place the genset a reasonable distance from guests even with a silent type
- Make sure the unit is DOSH certified for event safety
- Book early for popular dates (weekends, wedding season)
| Genset type | Suited for |
|---|---|
| Silent / canopy | Weddings, events, guest areas |
| Open type | Worksites, areas away from people |
What other factors should you weigh before booking?
Beyond kVA, consider the rental period, diesel, delivery, and deposit, because all of these affect your final cost.
A one-day function costs differently from a multi-day event. Diesel is usually charged by usage, while delivery depends on distance and site access. A deposit is standard for equipment rental.
Genset pricing starts from RM80 per day, but an exact quote depends on the unit size and your function's requirements. Contact us for a full quote.
- Rental period: one day vs several days affects the rate
- Diesel: usually charged by usage / refuelling
- Delivery & pickup: based on distance and site access
- Deposit: standard for equipment rental
- Backup: consider a standby unit for large / important functions
| Cost factor | Affects |
|---|---|
| kVA size | Daily rental rate |
| Duration | Number of days × rate |
| Diesel | Based on usage |
| Delivery | Distance & site access |
- Rough guide: small function 10–20kVA, mid-size 20–40kVA, large/air-conditioned 40–100kVA+.
- Air conditioning and electric catering are the biggest power draws at any function.
- Calculate the peak load of all items running at once, then add a buffer of about 20–30%.
- Choose a silent (soundproof) genset for functions so engine noise does not disturb the atmosphere.
- Confirm the size against a real load list — contact us for a quote (from RM80 per day, DOSH certified).
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Genset kVA sizing guide for weddings and events based on guest count and load. See kVA estimates plus silent genset tips. WhatsApp us for a quote.
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How many kVA genset for a 300-guest wedding?
For a function of around 300 guests, the rough estimate is 20–40kVA depending on the load. If you have an air-conditioned canopy or a lot of electric catering, the size can go higher. Send us a load list for an exact confirmation.
Do I need a silent genset for an event?
Yes, a silent genset is strongly recommended for weddings and events so engine noise does not disturb the speeches and PA. An open-type genset is better suited to worksites far from guests.
How do I know the right kVA size?
List every electrical item running at the same time, total their power, and add a buffer of about 20–30%. Motor-driven items such as AC need extra headroom for starting load. Contact us with this list for a check.
What draws the most power at a function?
Air conditioning and electric catering equipment are the biggest power draws. LED lights and PA are usually light, but an air-conditioned canopy can raise the kVA requirement significantly.
How much does a genset cost for a function?
Pricing starts from RM80 per day, but the final cost depends on the kVA size, rental period, diesel, delivery and deposit. Contact us for a full quote based on your function's requirements.
Can you deliver the genset on the day of the function?
Yes, we offer same-day delivery in Peninsular Malaysia, while Sabah, Sarawak and Labuan are subject to availability. For popular dates such as weekends in wedding season, it is best to book early.