Question:

300W UPS power can be used for how long

300W ups supply 10W small folder fan, can be used for how long By the way, how long and how to buy when to see what is urgent, thank you Or there is no way to do the way to provide a 10W small folder fan to work properly, is to 220V, 55 AC

Answer:

Similarly, 12V / 7AH UPS can work 8.4 hours, 12V / 65AH can work for 78 hours. Encountered other types of UPS, with the nameplate in the battery data corresponding to replace the corresponding voltage and capacity value can be. Of course, the capacity of different prices are also different.
For example: Known: a UPS nameplate superscript power 300W, 12V / 24AH, your power consumption of small fans is 10W. Then there are: With the power consumption to meet the requirements of not more than 300W, known conditions "300W" this data is useless; According to the energy conservation, regardless of the inverter, the protection circuit loss, small folder fan corresponding to the power consumption of the battery pack is 10W, so there are 24 / (10/12) = 28.8H, that is, small fans can not break the theoretical maximum Working hours 28.8 hours.
UPS parameters, in addition to the power there is a capacity. Power 300W that the load of the maximum power can not exceed 300W (with "W" as the unit is active power). Because the UPS is inside the battery + inverter + voltage regulator / protection circuit structure, so the UPS capacity refers to the built-in battery capacity. DC battery capacity is actually the rated discharge current x time, the unit is AH, A is the current, H is the discharge time (hours). General UPS nameplate has introduced the battery pack, such as "12V / 7AH", the "7" is a variable, there are 12V / 24AH, 12V / 100AH ??and so on. Household UPS battery packs are generally 12V battery in parallel, so the voltage is 12V.

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