How to Choose Energy Monitoring Software
Energy monitoring platforms split along two axes: where the data comes from, and which question they answer. Until both are clear, a comparison is just a feature count.
Last reviewed: September 2026
First axis
Where does the data come from: the supplier meter, or the site?
Half-hourly data from the supply meter is available through a letter of authority; a group of platforms runs on that alone. No devices, no installation, bill and demand analysis from day one. That is not a lesser approach — it is where many sites start, and it is why we offer a hardware-free start.
Its limit is equally clear: the supply meter sees the site total, not the panel or the machine. A compressor’s specific energy, a chiller plant’s system efficiency, a generator’s battery voltage, which line was left on overnight — those come from analysers and sensors on site, at minute resolution. The two approaches are not rivals but a sequence: start with the meter, go on site when the questions demand it.
Supplier data and site measurement
what each can and cannot see| Supplier data | On-site measurement | |
|---|---|---|
| Resolution | half-hourly, delayed | minute-level, live |
| Scope | supply meter | transformer, panel, machine |
| Installation | none | analysers, sensors, gateway |
| Sees | bills, demand, reactive ratio | equipment efficiency, leaks, COP, readiness |
| Cannot see | which machine, which hour | — |
| Remote control | not possible | possible with output modules |
| Time to start | days | weeks |
| Fits | multi-site portfolios, billing focus | plant rooms, efficiency, outages |
Second axis
Which question does it answer: the bill, or the plant room?
Some platforms are built around the bill: they validate line items, optimise tariffs, calculate carbon and gather a portfolio on one screen. They answer management’s and finance’s question — “what did we pay, was it right, what will we pay next month?”
The other group answers the plant room’s question: “why is the compressor using so much, has chiller efficiency dropped, will the generator start in an outage?” Those need a measurement method; they do not come out of billing data. When you read a module list, ask not for the module’s name but for the method behind it: how is leakage measured, what does the COP include, how are savings verified?
Which question it answers
platform type and its audience| Question | Billing-first | Plant-room-first |
|---|---|---|
| Is the bill right? | yes | yes |
| Reactive penalty coming? | yes | yes |
| Carbon report | usually strong | a module |
| How big is the air leak? | no answer | measures it |
| Chiller system efficiency? | no answer | measures it |
| Is the generator ready? | no answer | checks it |
| Switch off what was left on | no answer | remote control |
| Did the saving happen? | estimated from bills | proven against a baseline |
Twelve questions to ask before you buy
These apply whichever platform you choose. A question without a clear answer turns into a cost after the contract is signed.
- What resolution does the data arrive at? Half-hourly supplier data, minute-level site data, or both together?
- Can our existing analysers be connected? Any device speaking Modbus RTU/TCP with a known register map should connect directly; being forced to buy new ones doubles the installation cost.
- Who owns the data, and how does it leave? Is machine-readable export on request and deletion at contract end written down?
- Is consumption normalised for production and weather? Raw kWh comparison gives the wrong answer at any site where production varies.
- How deep is bill validation? Is only the total checked, or every line item against the tariff?
- How is alarm noise managed? Without dead band, aggregation and suppression while a system is off, alarms stop being read within a month.
- Which channel do notifications use? E-mail, panel, WhatsApp — and can recipients be assigned per rule?
- If there is remote control, is there authorisation and an audit trail? Control without a record of who switched what off, and when, is a risk.
- Can an ISO 50001 baseline be frozen? Without a reference-period regression and CUSUM, the “evidence of improvement” for a surveillance audit is produced by hand.
- Does the AI assistant show its sources? An answer without sources is a guess; prefer an assistant that gives no answer when there is no data.
- Is the price list public, and what do extra points and modules cost? A price learned only by quotation cannot be compared.
- What happens if data must not leave the site? Is there an on-premises option, and is the fate of the data when the licence lapses written down?
Our own answers to these twelve are on the pricing, security and solutions pages; nothing that is not written there goes into a quotation.
Frequently asked
Is supplier meter data enough for monitoring?
For bills, demand and the reactive ratio, yes; many sites start that way and the hardware-free start exists for it. Compressors, cooling, generators and overnight load are answered on site, not at the meter, so when those questions arise you move to on-site measurement.
Is a bill validation platform the same as energy monitoring?
No. Bill validation answers "did we pay the right amount"; energy monitoring answers "where, when and why was it used". Some platforms join the two; bought separately, the two data sets never talk to each other.
What drives the price of energy monitoring software?
Three parts: the subscription per site or per store, the modules chosen, and one-off hardware and installation. Compare on an annual cost per metering point; with a vendor that publishes no list price, that comparison is only possible after a quotation arrives.
What should we look for in a platform with an AI assistant?
Three things: does the answer cite its sources, does it refuse to answer when there is no data, and is the scope of data sent off site (raw archive or summary) written down. An assistant with no sources that answers everything produces reports nobody can check.
When is on-premises installation needed?
When corporate policy forbids data leaving the site. Its scope is narrower than the cloud edition (no cloud-dependent modules) and the licence model differs; ask in writing that data collection continues if the licence lapses.
Let us measure what is happening on your site.
In a one-hour call we look at your existing setup and set out exactly which measurement points are needed and what you would be able to see.