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Comparison APC Smart-UPS C 1000VA SMC1000I 1000 VA vs APC Smart-UPS 1000VA SMT1000I 1000 VA

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APC Smart-UPS C 1000VA SMC1000I 1000 VA
APC Smart-UPS 1000VA SMT1000I 1000 VA
APC Smart-UPS C 1000VA SMC1000I 1000 VAAPC Smart-UPS 1000VA SMT1000I 1000 VA
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Typesmartsmart
Form factorstandard (Tower)standard (Tower)
Full load operating time6 min6.1 min
Half load operating time16 min20 min
Input
Input voltage1 phase (230V)1 phase (230V)
Input voltage range180-287 V160-280 V
Max. current7 А
Bypass (direct connection)is absentis absent
Output
Output voltage1 phase (230V)1 phase (230V)
Peak output power1000 VA1000 VA
Rated output power600 W670 W
Output voltage accuracy5 %5 %
Efficiency98.3 %
Output waveformpure sine wave (PSW)pure sine wave (PSW)
Output frequency47-63 Hz47-63 Hz
Reserved C13/C14 connectors88
Battery
Battery(ies) connection to UPS24 V
Total battery capacity9 Ah12 Ah
Number of batteries22
Full charge time180 min180 min
Cold start
External battery connection
Battery hot swap
Protection
Protection
short circuit protection
overload protection
noise filtering
data line protection
emergency cut-off socket
sound alarm
short circuit protection
overload protection
noise filtering
data line protection
emergency cut-off socket
sound alarm
Surge protection455 J459 J
Control interfaces
RS-232
USB
 
 
USB
SmartSlot
General
Screen
Operating temperature0 – 40 °C0 – 40 °C
Noise level45 dB41 dB
Dimensions (HxWxD)219x171x439 mm219x171x439 mm
Weight24 kg18.86 kg
Added to E-Catalognovember 2013april 2012

Full load operating time

UPS continuous operation time from a fully charged battery when connected to a load with a power equal to the UPS output power (maximum or effective, depending on the type of load, see the relevant paragraphs for details). For a UPS designed to work with a home or office PC, a time of about 10-15 minutes is considered sufficient, this is enough to save data and complete work. To power servers, it is worth using devices with an operating time of 20 minutes or more.

Half load operating time

UPS continuous operation time from a fully charged battery when connected to a load with a power equal to half the output power of the UPS (maximum or effective, depending on the type of load, see below for details). The operating time with such a load is much longer than for a full load, and even in the simplest models it can reach 20-30 minutes.

Input voltage range

In this case, the input voltage range is implied, in which the UPS is able to supply a stable voltage to the load only due to its own regulators, without switching to the battery. For redundant UPSs (see "Type") this range is quite small, approximately 190 to 260 V; for interactive and especially inverter ones, it is much wider. Some UPS models allow you to manually set the input voltage range.

Max. current

The maximum current drawn by the UPS. In fact, the current reaches its maximum value only when the UPS is operating from the mains with maximum load power and a completely discharged battery. However, when calculating the load on the power grid, this parameter should be taken into account.

Rated output power

The effective output power of the UPS is, in fact, the maximum active power of the load that can be connected to the device.

Active power is consumed directly for the operation of the device; it is expressed in watts. In addition to it, most AC devices also consume reactive power, which is "wasted" (relatively speaking) is spent by coils and capacitors. Apparent power (denoted in volt-amperes) is precisely the sum of active and reactive power; it is this characteristic that should be used in accurate electrical calculations. See "Maximum output power" for details; here we note that when selecting a UPS for a relatively simple application, it is quite possible to use only effective power. This is at least easier than converting the watts claimed in the characteristics of the connected devices into full power volt-amps.

The most modest modern "uninterruptibles" give out less than 500 watts. 501 – 1000 W can be considered an average value, 1.1 – 2 kW is above average, and in the most powerful models this figure exceeds 2 kW and can reach very impressive values (up to 1000 kW or more in some industrial class UPS).

Efficiency

Efficiency (coefficient of performance) in the case of a UPS is the ratio of its output power to the power consumed from the network. This is one of the main parameters that determine the overall efficiency of the device: the higher the efficiency, the less energy the UPS wastes (due to heating parts, electromagnetic radiation, etc.). In modern models, the efficiency value can reach 99%.

Battery(ies) connection to UPS

Rated voltage of external batteries that can be used in the UPS.

For more information about such batteries, see "External battery connection", here it is worth saying that the voltage of the external battery must correspond to the voltage for which the UPS is designed. If these parameters differ, at best, the UPS simply will not start, and at worst, overloads and even a fire are possible.

In general, the more powerful the UPS, the higher the voltage of the external batteries it is designed for. However, there is no strict rule. Some models even allow for multiple voltage options, such as 96/108/120 V. It is also worth noting that a power source with the required voltage can be assembled from several lower voltage batteries connected in series: for example, 3 batteries of 12 V can be used to achieve 36 V.

It is important to emphasize that the standard voltages for most modern UPS systems are multiples of 12 V. However, car batteries cannot be used in these devices. Despite having identical voltages, car batteries are designed for a fundamentally different mode of operation. Using them in a UPS can result in, at best, improper functioning of the device, and at worst, fires and even explosions.

Total battery capacity

The capacity of the battery installed in the UPS. For models with multiple batteries, this is both the total working capacity and the capacity of each individual battery: the batteries in such devices are usually connected in series, so that their total capacity corresponds to the capacity of each individual cell.

Theoretically, a higher battery capacity means the ability to power loads of a given capacity for longer. However, in fact, this parameter is more of a reference than practically significant. The fact is that the actual amount of energy stored by the battery depends not only on the capacity in amp-hours, but also on the voltage in volts; this voltage is often not specified in the characteristics, despite the fact that for accurate calculations it must be known. So when choosing, you should focus on more "close to life" characteristics — first of all, on the directly claimed operating time in different modes (see above).

Cold start

The ability to turn on the uninterruptible power supply in the "cold start" mode.

A cold start is a turn-on mode in which there is no external power, and the load connected to the UPS is powered immediately from the uninterruptible battery (which, of course, must be charged). This mode is especially useful in emergency cases — for example, if you urgently need to print a document, but there is no light.
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