Reactive power charges on a hotel electricity bill: what they are and how to stop them

A reactive power charge is a line on a commercial electricity bill, billed when a hotel draws more reactive energy than a set share of its active energy, or feeds too much back into the network. It usually means the capacitor bank has failed, is undersized, or keeps running when the load has stopped.

The bill is paid every month by someone who reads the total and not the lines. Somewhere in the middle of it, a reactive energy line has been repeating since the spring, and nobody has asked what it is, because nobody on the finance side knows what a kVArh measures. After reading this you will be able to read the bill line by line, know the official limits, brief a technician on what to check, and put the whole thing on a monthly log.

What are the lines on a hotel electricity bill, in order?#

A commercial hotel bill is a stack of separate charges, and only one of them is the energy the hotel actually used. Reading them in order is what turns a single total into something a person can act on.

Active energy is the kilowatt-hours the hotel consumed, priced at the tariff that applies to its band, sometimes split into day, peak and night periods. The distribution charge is the network operator's regulated charge for delivering the power, usually a per-kWh element plus a fixed element, and it is not negotiable with any supplier. Contract power is a fixed monthly amount for the capacity the hotel reserved, charged whether or not the hotel uses it. The reactive and capacitive lines are kilovolt-ampere-hours reactive (kVArh) drawn from or fed back into the network, billed only when the ratios set by the regulator are exceeded.

Taxes and funds sit on top: the electricity consumption tax and value added tax apply to the charges as billed, so a reactive line also carries its share of tax. Check the reading period on every bill, because a long or short period changes how a charge is calculated and can hide a fault. Confirm the supplier name and tariff group too, since the same meter can be billed under different rules after a supplier change.

If you want to take this habit further, the same line-by-line discipline applies to what each sold room costs, line by line.

What is reactive power, in plain words?#

Reactive power is the energy that magnetic fields in motors, transformers and ballasts borrow and give back many times a second. It does no useful work, but the network still has to carry it, so the meter records it separately.

Active energy, measured in kilowatt-hours, is what turns the motor and lights the lamp. Reactive energy, measured in kilovolt-ampere-hours reactive, shuttles between the equipment and the supply. Inductive reactive energy is drawn by anything with a coil: pumps, compressors, chillers, air handling units, lifts, laundry machines, kitchen equipment and discharge lighting. Capacitive reactive energy flows the other way, from the hotel back toward the network, and comes from capacitor banks and lightly loaded cables.

Power factor is the ratio of useful power to total apparent power. A low factor means the same work needs a larger current, thicker cables and more losses in the hotel's own installation. The meter records both directions, which is why one bill can carry an inductive line and a capacitive line in the same month, sometimes in the same week. Capacitor banks are the standard remedy: they supply reactive energy close to the equipment, so the hotel stops drawing it through the meter.

When does a reactive charge appear? The limits in the official text#

A charge appears when the hotel's measured reactive energy crosses a ratio that EPDK sets for its installed power band, and then it applies to the whole measured value. Below the ratio there is no charge at all.

The rules come from EPDK's Procedures and Principles on the Tariff Applications of Distribution Licensees and Supplier Companies, Article 13 (Board Decision 5999-3, Resmî Gazete 31 December 2015, consolidated text). Out of scope entirely are residential consumers, lighting consumers, consumers supplied on a single phase, and users with installed power up to and including 15 kW. Below 50 kVA installed power, a charge applies if inductive draw exceeds 33% of active energy, or if capacitive feed-in exceeds 20% of consumption-based active energy. At 50 kVA and above, the limits tighten to 20% inductive and 15% capacitive.

Source: EPDK, tariff procedures and principles, Article 13.

Who the reactive tariff does not apply to#

The same article exempts the smallest and simplest connections. A guesthouse billed as a residential consumer, a single-phase supply, or an installation of 15 kW or less will not see a reactive line at all. Most working hotels do not sit in that group.

What happens on the first violation of the year#

In each calendar year the first violation is shown on the bill and deducted on the same bill; every later violation that year is charged. For readings covering more than 35 days, the charge is limited to 35 days. If the meter records zero for both reactive consumption and production through the user's fault, the charge is billed on reactive energy equal to 0.90 times the active energy.

Two cautions. Do not confuse this with Article 14(1) of the Electricity Grid Regulation, which sets 20% and 15% for consumers connected directly to the transmission system and for distribution licensees, not for a typical hotel. And the thresholds depend on the hotel's installed power band, so read the consolidated EPDK text and confirm the band with the supplier before acting.

What does a technician check on the compensation panel?#

The technician checks three things in order: whether the panel is alive, whether it is switching stages, and whether its controller agrees with the utility meter.

Start with the controller display: read the current power factor or cos φ, the inductive and capacitive ratios, the target setting, and whether the controller is in automatic mode rather than fixed. Then watch a stage switch in and out. A stage that never pulls in is a dead capacitor, a blown fuse or a failed contactor; a stage that never drops out may be welded closed.

Inspect the capacitors for swollen cases, leaking seals and discoloured terminals. A failed capacitor shows up as a missing stage, not as an alarm. Confirm that the ratio programmed into the controller matches the current transformer actually installed on the incoming cable: a wrong ratio makes the controller compensate against a number that is not real. Check the panel itself for loose terminals, heat, dust and blocked ventilation, because capacitors age faster in a hot panel, and a hot panel is a fire risk as well as a cost.

Finally, reconcile: the panel reading and the utility meter must tell the same story for the same period. If they disagree, the question is the meter, the transformer or the wiring, and it needs an electrician, not a guess. Record the visit: date, readings, stages working, parts replaced, and the name of the person who checked. This belongs on the same calendar as putting boilers, lifts, electrics and fire systems on one inspection calendar.

Why does a capacitive charge appear in the low season?#

Because the capacitor bank was sized for a full hotel and keeps supplying reactive energy after the motors have stopped, so the surplus flows back into the network and is measured as capacitive.

In the high season the kitchens, laundry, pools, chillers and lifts run for long hours, and that inductive load keeps the capacitor stages busy. In the low season the same stages stay connected if the controller is fixed rather than automatic, badly tuned, or has a stage stuck closed. The result is capacitive feed-in above the 20% or 15% limit, producing a charge in exactly the months when revenue is thinnest.

A controller that switches stages automatically toward a target power factor close to, but not above, unity avoids this. A fixed bank cannot, because it has no way to know the load has gone. A bank that fails repeatedly often points to harmonics from variable-speed drives and electronic loads rather than to poor capacitors, and may need detuned or filter stages. Some hotels genuinely need two configurations, one for the season and one for the quiet months, or a controller that measures both directions and treats them separately.

Before spending on new equipment, work through what to check in energy management and room controls before investing.

What are contract power, tariff group and the free consumer limit?#

Contract power is the capacity a hotel reserves and pays for every month, the tariff group decides which prices and rules apply, and the free consumer limit decides whether the hotel may choose its supplier at all.

Contract power is a fixed monthly charge on reserved kilowatts. Set too high, the hotel pays for capacity it never uses; set too low, it risks excess-demand charges on the busiest nights. Read contract power against the actual maximum demand over twelve months, not against one peak weekend, and revisit it after any major equipment change. The tariff group follows the connection and consumption level: a hotel normally sits in a commercial or industrial band, and that band decides which reactive limits and which prices apply.

On supplier choice, EPDK Board Decision 14039 of 18 December 2025 (opens in a new tab), published in the Resmî Gazete on 23 December 2025, set the free consumer limit for 2026 at 500 kWh, in force from 1 January 2026, so a hotel above that level may choose its supplier. Changing supplier does not change the distribution charge or the reactive rules: those follow the network connection, not the supply contract. Confirm the hotel's own band and limit with the supplier and the distribution company; this article gives the rule, not the hotel's individual case. Larger properties have a separate duty here, covered in energy management duties that can apply to larger properties.

How do you catch a reactive charge before it runs for months?#

Put the reactive and capacitive figures into a monthly log beside the daily meter reading, so that a person looks at the number every month instead of a machine paying it.

One row per month: reading dates, active kWh, inductive kVArh, capacitive kVArh, the two ratios, contract power and the bill total. Calculate the ratios yourself, because the bill shows the result of the calculation, not always the working behind it. Flag any month where a ratio moves by more than a few points, or where a line appears that was not on last month's bill.

Keep the compensation panel readings in the same log, so a failed stage becomes visible before the utility meter turns it into a charge. Translate the figure into cost per occupied room, so the owner sees the same number the technician sees. Give the log a named owner and review it at the monthly management meeting: a log nobody reads is a filing exercise. The log sits naturally beside daily meter readings a hotel can act on.

What to do next#

Pull the last three electricity bills, find the reactive and capacitive lines, and write the four figures into one row each. That single page tells you whether the charge is new, seasonal or growing, and that page is enough for a technician or a supplier to start from. From there the order is fixed: check the panel, correct the compensation, then reconcile the result against the next bill.