A small generator would generally be considered as a machine rated less than a 2KVA – 2.4KVA generator. Anything larger than this starts to become a little heavier and bulky.
Here are some tables to assist in selecting the right small generator based on your power requirements. These tables provide estimates of the typical appliances that various rated generators can run simultaneously:
Table 1: Small Generator Wattage Requirements for Common Appliances and Devices
| Appliance/Device | Estimated Wattage (W) | Estimated KVA (kVA) |
|---|---|---|
| LED Light Bulb (60W) | 8-10 | 0.008-0.010 |
| Laptop | 50-100 | 0.050-0.100 |
| Refrigerator (Full Size) | 800-1200 | 0.800-1.200 |
| Microwave Oven (800W) | 1000-1500 | 1.000-1.500 |
| Window Air Conditioner | 1000-4000 | 1.000-4.000 |
| Television (LED/LCD) | 50-400 | 0.050-0.400 |
| Electric Stove (One Burner) | 1000-1500 | 1.000-1.500 |
| Sump Pump | 750-1500 | 0.750-1.500 |
| Heating System (Gas Furnace) | 500-800 | 0.500-0.800 |
| Water Heater (Electric) | 3000-4500 | 3.000-4.500 |
Table 2: Small Generator Size Recommendations for Common Power Needs
| Rated Generator Size (W) | Appliances/Devices You Can Power Simultaneously | Estimated KVA (kVA) Range |
|---|---|---|
| 1000W – 2000W | LED lights, laptop, small refrigerator, TV, fan | 1.000-2.000 |
| 3000W – 4000W | LED lights, laptop, full-size refrigerator, TV, fan | 3.000-4.000 |
| 5000W – 7000W | LED lights, laptop, refrigerator, microwave, TV, fan, heater | 5.000-7.000 |
| 8000W – 10000W | LED lights, laptop, refrigerator, microwave, TV, fan, heater, sump pump | 8.000-10.000 |
| 12000W and above | LED lights, laptop, refrigerator, microwave, TV, fan, heater, sump pump, electric stove, water heater, air conditioner | 12.000 and above |
We recommend choosing a small generator with at least 20% more power than you require simultaneously. Please note that running your generator without 25% electrical load, or overloading the generator will damage your generator and void manufacturer warranty.
Please note that these are general estimates, and actual power requirements may vary based on the specific make and model of your appliances. It’s crucial to consult the appliance’s user manual or check the label for precise wattage information.
When selecting a small generator, consider not only the size and weight, but also the continuous power requirements and any start up surges that appliances may have. Choosing a small generator with a rated output slightly higher than your calculated total wattage needs ensures a margin of safety and prevents overloading.
Always consult the generator’s specifications and consult with a qualified electrician or generator expert if you have specific power requirements or complex setups.
Video: Choosing the Right Generator for your Air Conditioner
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By way of example the Honda 3.2kva weighs 26.5kg versus the Yamaha Ef2000is 2kva weighing in at 20kg. The dimensions of the Honda 3.2kva machine are similar in height with the Yamaha 2kva however the Honda 3.2kva is 26mm wider. This can be a consideration when it comes to storing and travelling with a generator. Whilst manufactures measure the sound levels in different ways, on face value the larger Honda generator is 7.5db louder than the smaller Yamaha 2kva. Something to also factor in if you are camping.
| Honda Eu32IU 3.2kva | Yamaha Ef2000is 2kva |
| Specifications:Model Name: EU32i Engine: GX130 4-stroke OHC engine Bore x Stroke: 56mm x 53mm Fuel System: PGM-FI Fuel Tank Capacity: 4.6L Cooling System: Air cooled Engine Speed: 4,800-5,500 (eco-throttle off) Ignition System: Full transistor Oil Capacity: 0.46 L Rated Output: 2.6KVA Maximum Output: 3.2KVA Noise Levels at 53~59 dB(A) Dimensions and Weight: Length: 571mm Width: 306mm Height: 452mm Weight: 26.5kgs | Engine Type OHV MZ80 Air Cooled Displacement (cc)79.0 Power Rating (W)2000.0 Rated Voltage (V)230 Frequency (Hz)50 Rated Output (kVA)1.6 Max Output2.3kW (3.1hp) 4500rpm DC Output12V / 8A Starter System Recoil Alternator Brushless Fuel Tank Capacity (L)4.4 Operating Hours 10.5 (Eco On) Noise Level (dBA)51.5 (7m) Dimensions and Weight: Length (mm)490 Width (mm)280 Height (mm)445 Dry Weight (kg)20 |