Consumption of backup power UPS Eaton 5E 1500i (5E1500IUSB)
Increasingly, backup powers called UPSs are appearing in homes. But how much does their operation cost us? Their use is wide, but in general it can be said that we install them where it is necessary to ensure operation after a power supplier failure. These can be minutes to hours of operation, depending on battery capacity and UPS load.
UPS Eaton E5 1500i (5E1500IUSB)
We have had an Eaton E5 1500i UPS with a 14.4Ah / 12V battery capacity connected for several years in our showroom in Prague. The batteries needed to be replaced after less than three years of operation, and this replacement was the impulse for writing this article. A load of approximately 14.8 W (daily consumption 357 Wh) is stably connected to the UPS. To date, we have had the longest electricity failure of just over 2 hours, which the backup power covered.
Complete technical parameters can be found in this datasheet by EATON.
Real consumption of the backup power
The measurement was performed with a pulse meter Hütermann HT-1PD in conjunction with a Loxone Miniserver 1st generation, which was used to read pulses. Originally, only the load was connected to the meter, before which the UPS was subsequently connected. The measurement has been going on for several years and over time, the consumption changes only in percentage units month-on-month, which is caused by small variations in the load on the UPS connection.
Before connecting the UPS, the daily consumption was 357 Wh, after connecting the UPS it increased to 877 Wh (normal operation without power failure). The difference is 520 Wh / day. So the annual consumption is 189.8 kWh. If we calculate the current electricity unit price around 23.90c EUR per kWh, you will have to pay an additional 45.4 EUR every year.
