High bill investigation that shows the customer when the extra use happened, and why
Usage, tariff, weather or leak: the real reason, in plain words.
See one case, screen by screen ↓When a customer calls about a high bill, someone has to work out whether the bill is right before anyone can answer. Today a tier-2 agent or billing investigator opens four or five systems — billing, meter data, the meter event log, weather, the tariff table — looks at a monthly bar chart, and very often books a meter test or a field visit to be safe. Most tested meters are accurate. The customer waits days for a slot, the bill stays disputed, and they call back.
The usual mistakes are the same every summer: a meter test booked for a usage-driven bill, an estimate catch-up explained as usage, a leak found only on the next bill, and a slab effect nobody explains — 57% more kilowatt-hours but 69% more money. Each one is a repeat contact, and an inconsistent answer becomes an escalation.
Estimated split of the 2.6 days a high-bill case took to reach an explanation by hand at the demo utility, in elapsed days, by hand and with the solution. With the solution the investigation itself takes about 6 minutes; the rest is the investigator's review and the call-back.
Six agents read the complaint, check the meter, rebuild the bill and split the extra use into causes; the billing investigator decides and signs.
Huda Saeed lives at Villa 27, Palm Row, Saffron Gardens. Her August bill from Lumina Utilities is AED 2,648.02, against AED 1,639.54 for the same 30 days of 2025 — up 61.5%. She wants her meter tested. Here is what happens next, screen by screen, in the working solution.
Huda calls the contact centre. Her bill is AED 2,648; last August it was AED 1,640. The family was travelling until the 9th, and she asks for a meter test. Omar opens case HB-26-08417, and the complaint reader marks each claim in the call transcript: “nobody was home until the 9th”, “the bill nearly doubled”, “test the meter”.
“Nobody was even home” — “True for 4–8 August: 61 kWh a day, against 208 on average. The extra use is after 11 August, in the heatwave.”
The queue holds 14 cases, 6 of them to decide. Huda's is day 2 of 5, answer due Fri 11 Sep. The map draws 6,240 kWh in 30 days from meter E-4471-0928 — each square one hour — with the daily maximum temperature from the Rimal station over it, the billing period of 4 Aug – 2 Sep bracketed, and pins for the pool service visit, the family coming home and guests arriving.
“Extra 2,260 kWh and 7.6 m³ against the same 30 days of 2025. The meter and the bill are right.”
The investigation run lists each step with its result. The meter data checker clears E-4471-0928. The bill rebuilder re-rates 6,240 kWh across 4 slabs, fuel surcharge and VAT: AED 2,264.64, exact. The usage explainer compares the period with 2025 and the Rimal station. The leak watcher checks water meter W-2207-3315. The letter writer drafts 206 words in English and Arabic, with 6 data points cited.
Last line of the run: “Layla Qasim · decide and sign — no error, adjust, meter test or field visit”
Both reads are actual: 48,112 on 31 Jul and 54,352 on 2 Sep. The hourly reads sum to 6,240.4 kWh against a register advance of 6,240 kWh, a difference of 0.01%. No tamper, reset, supply or radio events in 90 days — only a completed firmware update on 2 Jul. The last accuracy test, in March 2023, read +0.3% against a ±2.5% limit.
If a test were booked: “Customer waits 3–6 working days for a slot; the bill stays disputed” · one crew visit, about AED 380.
The bill rebuilder prices the reads again on the tariff in force each day: rebuilt AED 2,264.64, issued AED 2,264.64, difference AED 0.00. Use is up 57%, but the electricity charge is up 69%. None of last August's 3,980 kWh passed slab 2; this August 2,240 kWh fell in slabs 3 and 4, at 32 and 38 fils.
“The letter says this in one sentence.”
Layla picks the first cause and the map lights the band from 2 pm to midnight, 11 to 24 August, while everything else dims. The heatwave reached 49.1 °C at the Rimal station. Cooling ran 19 hours a day against 13 on the same days last year: +1,540 kWh, AED 632.28, at 94% confidence.
Electricity: cooling 1,540 · pool pump 420 · evenings 300 kWh. With the night flow and the garden water, the causes add up to the whole +AED 1,008.48.
The second cause lights the night hours from Thursday 6 August, the day of the pool service visit. The pump has run every hour since — 22 kWh a day, not 7: +420 kWh, AED 172.43, at 88%. The customer mentioned the pool man on the call; the hourly data shows a flat 0.93 kW load every hour since that visit.
In the letter: “Setting the timer back to 8 hours saves about AED 180 a month.”
Switched to water, the map shows no zero-flow hour between midnight and 5 am since 19 Aug 02:00 — about 9 litres an hour, likely a toilet cistern that keeps running. It adds 3.2 m³ and AED 33.94. The leak watcher flags it; a leak allowance is Layla's decision.
Agent limit: “Flags only; a leak allowance is a person's decision.”
Finding: no billing error — usage-driven. A leak allowance of AED 33.94 once the cistern is repaired, within her AED 1,000 limit. Instalments of AED 336.16 a month for 3 months, no fee. The meter-test request is closed, with a free test offered if Huda still wants one. The letter goes by email, SMS with a link and the Lumina app.
Meaning of the signature: “I have reviewed the data behind this finding and approve the letter to the customer.”
The letter opens “Your bill is right. Here is why it is higher than last August.” It explains the heatwave, the pool pump, the night water flow and the slabs, with Huda's own daily chart and the temperature line. Beside it, each paragraph names its source — the bill, the hourly reads, the call transcript, the tariff, the meter event log, the billing rules.
“The letter shows only this customer's own data. Agents drafted it; it is sent only when you sign.”
The same high-bill complaint, seen by the four people who answer it — what their summer looked like, and what it looks like now.
Six agents read the complaint, check the meter, rebuild the bill and split the extra use into causes; the billing investigator decides and signs.
Reads the call transcript, email, chat or app message about a high bill; finds the account, the premises and the bill the customer means, and lists each claim and what they ask for — an explanation, a meter test, instalments or a refund.
Checks whether both reads are actual, whether the hourly data matches the register advance within 0.5%, any tamper, reset, supply or radio events in 90 days, and the accuracy-test history; recommends a test or not.
Re-rates the bill from the opening and closing reads on the tariff in force each day — slabs, fuel surcharge and VAT — compares it line by line with the issued bill, and flags any difference, tariff change or estimate catch-up to the fils.
Draws the hour-by-day picture, compares the period with the same days last year and the nearest weather station, and splits the extra use into likely causes — cooling, pumps, water heating, more people, a leak — each with its kWh or m³, AED at the slab price and a confidence.
Finds continuous water flow — runs of 48 hours or more with no zero-flow hour between midnight and 5 am — with its start, its rate in litres an hour and its volume; runs every night across all water meters and attaches a leak to any open high-bill case.
Writes a one-page explanation in plain words, under 250 words, in English and Arabic: whether the bill is right, the biggest reasons with dates, hours and amounts, an answer to each claim, and what the rules allow — instalments, a leak allowance, a free meter test.
Decides and signs. The agents propose; a named person decides.
Ask about any high bill, meter or letter — or say what to change. Every answer points to its records.
Why is Huda Saeed's bill 61% higher?
Mostly cooling in the heatwave. Of the extra 2,260 kWh, cooling is 1,540 kWh (68%): it ran 19 hours a day from 11 to 24 August, when the Rimal station reached 49.1 °C. The pool pump has run every hour since the service visit on 6 August, 420 kWh. Evenings are up 300 kWh from 15 August. The meter and the bill are right.
Does this meter need a test?
No. The hourly data sums to 6,240.4 kWh against a register advance of 6,240 kWh; both reads are actual; there are no tamper, reset or supply events in 90 days; the 2023 test read +0.3%, inside ±2.5%. If Ms Saeed still wants a test after the letter, it is free once in 18 months.
Which open cases are estimate catch-ups?
Three: HB-26-08392 Rashid Karam (radio stopped 2 Jun, 1,680 kWh caught up), HB-26-08413 Hamad Jaber, and HB-26-08402 Grace Mbeki (letter sent). In each, re-spreading the catch-up into the months it was used keeps the lower slab rates.
Add a 3-month instalment plan to the letter
Added to Ms Saeed's letter: AED 1,008.48 over September, October and November, AED 336.16 a month, no fee. It goes with the letter when you sign.
13 screens from the working solution, on its sample data. Pick one to see it large.
What counts as a high bill, who may decide what, and how letters read are settings. Changes apply to new cases and are recorded.
| Setting | Default | Choose from |
|---|---|---|
| Rise on the same period last year | 40% | Set in steps of 5% — this test or the money test opens a case |
| Or a rise in money | AED 500 | Set in steps of AED 50 — catches small bills that jump |
| Warn the owner at | 3 days | Set in steps of 1 day, of a 5-working-day written answer; the complaints lead is warned too |
| Investigator adjustment limit | AED 1,000 | Set in steps of AED 250 — above it, the billing supervisor approves |
| Instalments without approval | 3 months | Up to 3 months, no fee, for usage-driven high bills; longer needs the supervisor |
| Leak allowance | On | On · Off — once in 24 months, flow of 48 h or more, repair proof within 30 days, leak water credited in full |
| Recommend a meter test when hourly data and register differ by more than | 0.5% | Set in steps of 0.1% — or when an event is found, or reads are estimated; a free test on request once in 18 months |
| Longest letter | 250 words | Set in steps of 25 words — English and Arabic sent together, with the customer's own chart |
Every figure is labelled: a target the solution is built to, an estimate, a typical published result, or a proven one.
“demo” = seen in the working solution, on its sample utility data · “target” = the design goal, measured in the live solution · “estimated” = our arithmetic, inputs shown (AED 535K = 900 meter-test visits avoided × AED 380 + 5,500 repeat calls avoided × AED 35, on the demo utility's volumes of 1,140 test requests and 14,600 high-bill contacts a year; the days split is our estimate) · “typical” = published figures (E Source and NSTAR: 90%+ of customers satisfied when resolved first time, 59% after a call-back, $9.54 a call; S&C Electric via industry summaries: $250–$500 a truck roll; Energy and Water Ombudsman Queensland 2022–23: billing 69% of complaints). Lumina Utilities and the people, premises, accounts, meters and weather stations named on this page are fictional — characters and sample data in the working solution.
Software that takes a high bill complaint from the first contact to a decided finding and a letter the customer can understand. High Bill Investigation adds six agents that read the complaint, check the meter, rebuild the bill and split the extra use into likely causes from the account's own smart-meter data. The billing investigator decides and signs.
It draws the account's hourly electricity and water reads as an hour-by-day map, with the daily temperature and the billing period over it, and compares the period with the same days last year. The usage explainer matches the shapes to likely causes — cooling follows the temperature, a pump is flat every hour, a leak never reaches zero at night — and gives each one its kWh or m³, its cost and a confidence.
It shows when a test is not needed and why: both reads actual, the hourly data matching the register, no events and a passed accuracy test. It recommends a test only when one of those checks fails. It never cancels a test the customer still wants; the letter offers one free, as the rules allow.
Yes — each case gets a finding: usage-driven, estimate catch-up, leak, meter or read fault, tariff or billing error, or a longer billing period. In the sample cases it finds a radio fault that left June and July estimated, a split irrigation pipe, a start read keyed wrong after a meter exchange and an account moved to the wrong tariff.
The bill rebuilder re-rates the bill on the tariff in force each day, slab by slab with fuel surcharge and VAT, and shows where the kilowatt-hours landed. When money rises faster than use — 57% more kWh but 69% more money in the sample case — the letter says why in one sentence.
Yes. The agents never change a bill, credit an account, cancel a test or send a letter. The investigator signs every finding and letter with its meaning recorded, adjustments above the investigator's limit and every read-fault rebill go to the billing supervisor, and every step is on the audit trail.
Yes. What counts as a high bill, the warning day on the charter clock, the investigator's adjustment limit, instalments without approval, the leak allowance, when to recommend a meter test, the letter length and languages, and pre-bill leak and jump alerts are all settings.
The Agentic Solution Engine builds and deploys it from your requirements and documents — your billing rules, tariff tables, letter templates and a sample of past high-bill cases — and it goes live once every quality gate has passed. We will walk you through it on your own high bills first.
Held bills cleared in two days, not six, with the cause and the fix attached.
1-min demoRevenue Assurance AnalyticsRecover the 2-4% that leaks between meter and bill.
1-min demoBilling Dispute ResolutionEvery dispute decided on its evidence, inside the clock, with the letter already cited.
1-min demoWe'll run High Bill Investigation on a sample of your own high-bill complaints and smart-meter data.