The main reasons are as follows:
1, the higher the UPS power, the higher the natural selling price.
2, the longer the battery life, the larger the battery, the battery is very heavy.
3, home computer use 500W UPS battery is 12V 9Ah, can be used for about 20 minutes.
4, the significance of the uninterruptible UPS is that when the desktop suddenly power failure, data will be lost. For software creation, drawing, document editing impact is very large, so you can choose an uninterruptible power supply to maintain power supply.
5, UPS battery capacity is limited, after the power outage, to save the work on the computer in a timely manner, and then shut down normally. If you need an uninterruptible power supply battery for a long time, you need a large-capacity battery pack, high cost and large size.
6, the calculation of battery capacity. For example, for 12V 9AH battery, the storage capacity of 12 * 9 = 108Wh, about 0.1 kWh. the battery can supply 100 watts of electrical appliances work for one hour. In fact, the inverter efficiency of the UPS can not be 100%, the time to be discounted.
Currently the backup UPS should be 500VA/200W backup for about 10 minutes, if by 100W, it will take about 30 minutes.
Can be purchased according to the following reference:
1, first consider the size of the load, the characteristics of the load device, the importance of the load device, the impact of bad power on the load and other personal needs.
2. First of all, understand that you need to consider the product performance such as backup, online and online interaction.
3, the most important thing is to pay attention to the power of the device, distinguish between the actual power and rated power, distinguish between the power-off delay time. 4, procurement, pay attention to whether the device is an inductive load, test equipment is centralized or decentralized equipment.
5, the last one is also necessary to consider, that is, in the purchase of UPS to consider their own brand and after-sales service, try to choose the super Entek such a high visibility of the brand, the use of the later and maintenance of the relative guarantee.