Battery life and reliability of the UPS

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All UPS APC produced (and all other major manufacturers of the famous UPS), used lead acid batteries that are very similar to the most common car batteries. The difference is that, if we compare this with car batteries, the batteries used in APC, manufactured by the same technology with the most expensive of the currently available vehicle: Released electrolyte is in the gel state and poured damaged casing, battery sealed, so that it does not require maintenance, does not evolve during the operation of hazardous and explosive gases, it is possible to “turn over” as you like, without fear of shedding the electrolyte. By the way, quite interesting is that a little-known fact that the American Power Conversion Corporation is the world’s largest buyer of batteries: the volume of purchases APC batteries more than, say, a Ford Motors, the leader of the world automotive industry.

Startling news about durability UPS

Despite the fact that the unit is used in a variety of seemingly the same battery technology that is shaking the life of UPS batteries from different manufacturers in a wide range. This is very important for the users, since replacement batteries are expensive (up to 30% of the original cost of the UPS). Output battery failure reduces the reliability of the system is a source of downtime and anxiety. Learn more about rbc2 battery.

Battery temperature affects the reliability

Natural processes that cause aging batteries are highly dependent on temperature. Detailed test data from the manufacturer, the battery shows that the life of the battery when the temperature at every 10yaS reduced by 10%. This means that the design of the UPS should provide minimum heating power. All UPS topology with on-line and hybrid-on-line hotter than a back-up or line-interactive (which is why the first fan is required). This is – the most important reason why a UPS backup and line-interactive type rarely need replacement batteries than UPS topology with on-line. In UPS systems APC batteries operate at room temperature, which increases their efficiency in maximizing system reliability, and reduces the time to replace the batteries.

The design of the device for charging the battery affects the reliability

The charger is an important component of the UPS. Terms of recharging the batteries have a significant impact on their life.

UPS battery life is maximum in the case, if it is continuously recharged by the battery charger with constant voltage or “floating” type. In fact, the life of rechargeable batteries is much longer than a simple storage! This is because some of the natural aging process suspended constant recharging. Therefore it is necessary to recharge the battery, even if the unit is. In many cases, the UPS turns off the regular (if the protected load is off, there is no need to hold on and the UPS, because it might work and cause unwanted wear on the battery.)

All APC UPS batteries are charged even when the UPS is turned off (only necessary that the UPS is connected to the mains). Many of the proposed sale to the UPS does not provide such an important function. Although this function and increases the price of the UPS, the total cost of the UPS APC during the life of the light of “hidden” cost of replacing the battery below.

Battery voltage affects the reliability

Batteries are made up of individual cells, about 2 volts each. To create a higher voltage battery individual elements are connected in series. A 12-volt battery, 6-cell, 24-volt – 12 elements, etc.

When the battery is in trickle charge, as in UPS systems, individual elements can be recharged simultaneously. Because of the inevitable spread of settings, some elements taken a large share of the charging voltage than the other, which causes premature aging of cells. Reliability of a group of cells in series determined by the reliability of the least reliable element. So when one of the elements fails, it fails and the battery as a whole. It is proved that the rate of aging is directly related to the number of cells in the battery, so the rate of aging increases with the battery voltage. For a given value of the life of the greatest load will have less stress UPS battery.

The best types of UPS used a smaller number of more powerful elements in place more items less power, thereby achieving greater reliability. Some manufacturers use a higher voltage battery, which, for a given power level makes it possible to reduce the amount of wiring and semiconductors, and thus reduce the cost of the UPS. Battery voltage of most typical UPS with a power of about 1 kW of 24 … 96 V. At this level of power from the batteries in the UPS APC, in particular, family Smart-UPS, voltage does not exceed 24V.

Battery low voltage UPS manufactured by APC, have higher than competing devices lifetime. Average service life of the batteries in APC systems is three to five years (depending on the temperature, frequency, charge-discharge cycles), while some manufacturers indicate the life of only one year. During the 10-year life of the UPS systems some users spend twice as much on the battery than the device itself! Although the development of the UPS using high voltage batteries and cost producer easier and cheaper for the user in this case lie hidden costs in the form of a shortened life of the UPS.