When choosing portable power supply, the core is rated power ≥× 1.2 of the total power of the equipment used at the same time, and it must be greater than the maximum power of a single equipment.
First, understand two key power concepts.
Rated power (continuous output power): the power that the power supply can output stably for a long time, which is the core index of purchasing.
Peak power (instantaneous power): the maximum power that the power supply can bear in a short time (several seconds). It is only used to start motor equipment (such as refrigerators and water pumps) and cannot be used as a basis for continuous power supply.
Second, three-step accurate power selection
1. List all the equipment to be brought and check the power.
Check the nameplate, adapter or manual of the equipment to obtain the rated power (W).
Mobile phone/tablet: 5–20w
Laptop: 45–90w
Car refrigerator: 40–100 W (starting peak is about 600W)
Projector: 100–300 w
Rice cooker/electric cooker: 600–1000 w
Induction cooker/microwave oven: 1200-2000W W.
2. Calculate the total power demand
Single equipment: rated power of power supply > equipment power
Multi-equipment use at the same time: total power = sum of power of each equipment × 1.2 (20% margin reserved).
Example: car refrigerator 80W+projector 200W = 280W → rated power ≥ 336W is recommended.
3. Select the power gear according to the scene
form
Recommended rated power adaptation equipment for the scene
Daily/short-distance camping (only for mobile phones and computers) 300–500 W mobile phones, notebooks, small fans and LED lights.
Self-driving/camping (cooking, audio and video) 800–1500 W rice cooker, electric cooker, projector, car refrigerator.
Family emergency/RV 2000W+air conditioner, microwave oven, induction cooker, refrigerator
Third, the main points of avoiding pits
Just look at the rated power, not the peak value: the peak power cannot be used as continuous power.
The starting peak of motor equipment should be calculated: the instantaneous power of refrigerator and air conditioner is 3-5 times the rated power, and the peak power supply should be covered.
Capacity (Wh) and power matching: High-power equipment needs to be equipped with large capacity, otherwise the battery life will be extremely short.
Reserved margin: Leave at least 20% power margin to avoid overload protection.
Fourth, suggestions for rapid selection
Charge only digital devices: 300–500 W.
Camping and cooking+audio and video: 1000–1500 w
With induction cooker/air conditioner: 2000W+
