In the event of a long power outage, whether a portable power station can meet the basic power needs of a household depends on the following key factors:

Definition of basic household power needs
Basic household power needs vary from person to person, but generally include the following devices:
Lighting: low-power devices such as LED lights and table lamps.
Communication equipment: mobile phones, routers, laptops, etc.
Small household appliances: electric fans, small refrigerators, electric kettles, etc.
Medical equipment: such as ventilators and oxygen concentrators that require power support.
The power and power consumption of these devices vary greatly. For example:

LED lights: 5-10W
Mobile phone charging: 5-20W
Laptops: 30-60W
Electric fans: 20-50W
Small refrigerators: 50-100W (may reach 300-500W when starting)
Routers: 5-10W
Calculating the total power and running time of these devices can estimate the basic power needs of a household.

Capacity and output capacity of portable power stations
The core parameters of portable power stations are battery capacity (in Wh) and maximum output power (in W). The following is an evaluation of the performance of power stations of different capacities during power outages:

Small capacity power station (less than 500Wh)
Applicable scenarios: Suitable for powering small devices such as mobile phones, laptops, LED lights, routers, etc.

Battery life:
A 500Wh power station can power a 50W electric fan for about 10 hours, or a laptop for about 8-10 hours.
It cannot meet the long-term operation of high-power devices (such as refrigerators and air conditioners).
Advantages: Lightweight and easy to carry, relatively low price.
Disadvantages: Limited capacity, not suitable for long-term power outages or simultaneous use of multiple devices.
Medium capacity power station (500Wh-1000Wh)
Applicable scenarios: Suitable for the basic power needs of small and medium-sized families, and can support small refrigerators, electric fans, LED lights, routers and other devices.
Battery life: A 1000Wh power station can power a 50W electric fan for about 20 hours, or a small refrigerator for about 10-12 hours (considering the starting power). It can provide power for multiple low-power devices (such as mobile phones, laptops, LED lights) for a long time. Advantages: moderate capacity, can cope with short-term power outages. Disadvantages: still insufficient for high-power devices (such as air conditioners, electric water heaters). Large-capacity power station (above 1000Wh) Applicable scenarios: suitable for large-scale household electricity needs, and can even be used as an emergency backup power supply to support some high-power devices. Battery life: A 2000Wh power station can power a small refrigerator for about 20 hours, or a 50W electric fan for about 40 hours. If equipped with a solar charging panel, it can continuously replenish power during the day to extend the battery life. Advantages: large capacity, suitable for long-term power outages or simultaneous use of multiple devices. Disadvantages: Large size, heavy weight, and high price.

Factors affecting actual performance
Device startup power: Some devices (such as refrigerators and air conditioners) consume higher power instantly when starting, which may exceed the maximum output power of the power station.
Battery efficiency: The power station will have a certain energy loss when converting DC power to AC power, usually with an efficiency of 80%-90%.
Ambient temperature: Extreme high or low temperatures will affect battery performance and may shorten the actual battery life.
Charging method: If equipped with a solar charging panel, the power can be replenished by solar energy during the day, thereby extending the overall usage time.

If you plan to buy a portable power station as a home backup power source, it is recommended to choose a model with a suitable capacity according to actual needs and test its performance in advance to ensure reliable use in emergency situations.