Sub-Metering Cost in Malaysia: Budget Per Point

A three-phase electricity sub-metering point in Malaysia usually lands somewhere between RM1,500 and RM6,000 fully installed. That spread is not vendor greed, it is scope. The sub-metering cost of one point has to cover the meter, current transformers sized to the feeder, a comms path back to a platform, the labour to work inside a live switchboard, and the software that turns raw registers into something a facility manager can act on at 9am on a Monday. Change any one of those and the number moves by a factor of two or three.

Everything below is an indicative Malaysian market range, gathered from the shape of quotes rather than any single price list. Your actual quote will move with brand, panel condition, cable route, site access and how much of the work happens outside normal hours. Use these figures to interrogate a proposal, not to argue a vendor down to a number you read on the internet.

What is actually inside one sub-metering point?

A "point" is a monitored circuit, not a device. For a three-phase feeder you are typically buying a power meter with voltage and current inputs, three CTs, a small MCB and fuse arrangement for the voltage sense wires, DIN rail and enclosure space, a comms link, commissioning and labelling, plus the platform licence that keeps the data alive.

The commonest costing mistake is pricing the meter and forgetting the other five items. A RM600 meter can carry RM2,000 of CTs, cable, labour and after-hours access behind it. When you compare two quotes, normalise them to cost per monitored circuit including installation and one year of software. Otherwise you are comparing a hardware list against a working system.

Meter class and CT size: where the hardware money goes

Meter accuracy class is the first fork. A Class 1 three-phase energy meter, which is fine for load profiling, base load hunting and internal accountability, typically sits in the RM400 to RM1,500 range depending on brand and whether it does harmonics and per-phase logging. Class 0.5S, which you want when money changes hands or when you are producing measurement and verification evidence, more commonly runs RM1,200 to RM3,500. Do not buy 0.5S everywhere out of habit. Buy it where a number will be invoiced or defended.

Current transformers scale with the conductor, not the price of the meter. Small split-core CTs for a 100A to 400A feeder are often RM80 to RM400 each. Once you are clamping a 1,000A to 4,000A incomer, or dealing with busbar geometry that needs flexible Rogowski coils, expect several hundred to over a thousand ringgit per phase. Three of those adds up quietly. Ask the vendor to state CT ratio, split-core or solid-core, and accuracy class for every point, because a solid-core CT means the feeder has to be de-energised to fit it.

Wired or wireless? The installation economics

Installation is usually the largest single line in a retrofit, and it is decided by distance and containment, not by technology preference.

Wired RS-485 daisy chains are cheap and reliable when the meters sit in the same panel or adjacent panels. Once you are running shielded cable across a car park, up a riser or between blocks, the cable, trunking, penetrations, hot works permits and lift access can cost more than everything else combined. Rule of thumb from real sites: cabling stops being the obvious answer somewhere past 50 to 100 metres, or the moment a wall has to be drilled.

That is where LoRaWAN changes the arithmetic. One gateway, indicatively RM1,500 to RM6,000 depending on whether it is indoor or outdoor rated, can serve dozens of meters across a campus with no new cable between them. The gateway is a fixed cost that gets cheaper per point as you add points, which is why wireless often loses on a five point pilot and wins clearly on a forty point rollout. Our explainer on how LoRaWAN works for energy monitoring covers the range and battery realities before you assume coverage.

What does panel downtime really cost?

This is the line item nobody quotes and everybody pays. Split-core CTs can go on live in many cases, but the voltage reference wiring still means working inside an energised board, and most competent contractors and most insurers will want that feeder dead.

For a factory, a shutdown window means either a weekend, a scheduled maintenance day, or lost production. Price the second and third honestly. A single hour of unplanned downtime on a production line will often exceed the entire hardware bill for the phase. The practical answer is to sequence sub-metering into a shutdown that is already scheduled, and to accept an after-hours labour premium, commonly 1.3 to 2 times the day rate, rather than create a new outage.

Software, platform and the recurring line

Hardware is a one time number. The platform is not. Malaysian market pricing for cloud energy monitoring commonly appears either as a per point per month subscription in the region of RM15 to RM60, or as a base platform fee plus a smaller per point increment. Some vendors bundle the first year into capex, which makes year one look cheap and year two look surprising, so always ask for a five year total cost including licences, SIM or connectivity, and firmware support.

Check what the fee actually buys. Interval data at 15 minutes or better, retained for years, not weeks. Max Demand tracking against the billed 30 minute interval. Alerts that reach a human on WhatsApp or email rather than a dashboard nobody logs into. Exportable data you own. CobiNeural does this either standalone or as an overlay on an existing BMS, PLC or SCADA, which matters if you already have controllers holding the data and simply cannot get it out.

How point count changes the sub-metering cost per point

Unit cost falls with volume, but not evenly. Gateways, engineering, drawings, commissioning and project management are largely fixed. Meters and CTs are strictly variable. So a 5 point job might average RM4,000 to RM6,000 per point, a 20 point job might average RM2,500 to RM4,000, and a 50 point campus rollout can drop toward RM1,500 to RM2,500 per point for standard sized feeders.

The counterweight is that big feeders cost more than small ones. Twenty small MCC circuits in one panel are far cheaper per point than five 3,000A incomers spread over four substations. Ask for the quote to be broken into hardware, installation, comms infrastructure and software, per point, so you can see which lever you are actually pulling.

How many points does a first phase actually need?

Fewer than you think. The instinct is to meter everything, which triples the budget and buries the team in dashboards. A disciplined first phase is the main incomer plus the loads big enough to matter, usually chillers or the chilled water plant as a block, the largest AHU or pump group, compressed air, and any production line or tenant zone with its own accountability.

Eight to fifteen points covers most single site buildings and small plants. That is enough to split the bill into recognisable chunks, and enough to attribute Max Demand. Under RP4, Medium Voltage demand charges run at RM89.27/kW/month for the General tariff and RM97.06/kW/month under ToU, billed on the month's single highest 30 minute interval, so roughly every 10 kW of peak you can identify and shift is worth about RM10,700 a year. You cannot shift what you cannot see, and you cannot see it from one utility meter. Confirm your own tariff terms at the TNB pricing and tariffs page.

Phase two then goes wherever phase one pointed. Almost always that is somewhere nobody predicted. The pattern of what sub-metering typically uncovers, especially overnight base load that should be near zero, is the fastest way to justify the next tranche. If the driver is recovering cost from occupants, the mechanics of tenant electricity billing in Malaysia will also dictate meter class before you buy anything.

Questions to put to the vendor before you sign

Ask for meter make, model and accuracy class per point. Ask for CT ratio and whether installation requires a shutdown. Ask who supplies and pulls cable, and whether hot works permits and after-hours access are inside or outside the price. Ask what happens to your data if you stop paying. Ask for the five year total, not the capex. And ask for a single named point of contact for commissioning, because a meter that reports the wrong CT ratio is worse than no meter at all.

If you want a scoped point list and an honest capex plus opex figure for your own switchboards, request a demo and we will size a first phase against your actual single line diagram.