News
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The Problems of Verification in Building Energy Retrofits
Malaysia · Building retrofit · M&V The Problems of Verification in Building Energy Retrofits When Energy Service Companies making HVAC (Heating, Ventilation and Air Conditioning) retrofits , VFDs(Variable Frequency Drive) need to be added, and the chillers will be replaced with high-efficien...Read more -
How Sub-Metering Prepares Factory Energy Data for Carbon Reporting
How Sub-Metering Prepares Factory Energy Data for Carbon Reporting In corporate sustainability reporting, emissions from purchased electricity are an electrical measurement problem before they are an accounting one. Under the GHG Protocol and Malaysia’s National Sustainability Reporting Fra...Read more -
From 15-minute data to a billed maximum demand: a reconciliation method
You have the meter’s interval data and the TNB bill. The question is not which number looks more reasonable. It is whether the two records can be compared at all. Three checks and one arithmetic step decide that, and the arithmetic is where most comparisons go wrong. Check a Malaysia site ...Read more -
TNB Maximum Demand: Why One 30-Minute Peak Sets the Bill
Malaysia · Maximum demand Why does one 30-minute peak set your whole TNB bill? Your production did not change, but the bill did. Maximum demand is the highest 30-minute average power in the month, and it sets the demand charge. 01 · The bill Your bill is tracking two different things A ...Read more -
Rooftop Solar and TNB Power Factor Surcharge: What a Factory Should Check First
ACREL MALAYSIA · SOLAR EPC FIELD NOTE Rooftop Solar and TNB Power Factor Surcharge: What a Factory Should Check First A rooftop PV system can operate normally while the power factor at a factory's utility meter falls during some operating periods. For a factory supplied by TNB, a surcharge depe...Read more -
Solar PV Power Factor in Malaysia: Why It Falls and What EPCs Should Check
ACREL MALAYSIA · SOLAR EPC FIELD NOTE Solar PV Power Factor in Malaysia Why It Falls After Rooftop PV and What EPCs Should Check First Start with the grid meter Some commercial and industrial sites see lower PF at the utility meter after adding rooftop PV. PV supplies part of the active load,...Read more -
C&I Energy Storage Monitoring: The 30 Minutes That Set Your Demand Charge
C&I Energy Storage · Malaysia The half hour that sets your demand charge A commercial battery only pays back when the meters behind it agree with the utility, the inverter and the fire panel. This is the five-layer stack that makes that happen on a 415 V site. 01 Background Storage is a ...Read more -
Four Protocols, Four Jobs
Microgrid · Protocol selection · Malaysia Four Protocols, Four Jobs A microgrid rarely fails because a meter is wrong. It fails because one link keeps answering a question nobody asked. 01 · The map Four layers, four questions A fieldbus asks how the data comes up. Ethernet asks how fast it mo...Read more -
A UPS Keeps the Monitor On. It Does Not Make the Theatre Safe.
Malaysia · Hospital power · Medical IT A UPS Keeps the Monitor On. It Does Not Make the Theatre Safe. A UPS covers a power cut. It does not clear a first earth fault. In an operating theatre, those are two different jobs. 01 · The fault a UPS cannot clear Two failures, one room Hospitals plan f...Read more -
Is Your Maximum Demand Averaged Over 30 Minutes?
Malaysia · Maximum demand · APM521 Is Your Maximum Demand Averaged Over 30 Minutes? A meter can compute demand correctly and still disagree with the bill. One setting explains most of it: the averaging window. 01 · The bill The bill uses 30 minutes TNB bills maximum demand over a 30-minute win...Read more -
Five Installations That Decide Which Split-Core CT You Buy
Malaysia · Current transformers · Five installations Five Installations That Decide Which Split-Core CT You Buy Nobody buys a CT by ratio. They buy it for a cabinet, a busbar or a cable that is already there. Five installations cover most of what ships, and each one has a model and one thing tha...Read more -
Your TNB Bill Has Five Lines. Your Panel Still Has One Meter.
Malaysia · Submetering · Tariff structure Your TNB Bill Has Five Lines. Your Panel Still Has One Meter. Since July 2025 a Malaysian electricity bill has been itemised into five charges. The switchboard behind it still reports one number. That gap is where savings disappear. 01 · What the bill...Read more
