Blog

Practical insights on energy, building automation, and compliance for buildings and industry, by the Cobler team.

Rows of tenant electricity check-meters and labelled circuit breakers mounted on panel boards in a commercial building riser room under fluorescent lightTNB Bills & Tariffs

Tenant Electricity Billing in Malaysia: Rules & Setup

Cost recovery via check meters is legal; unlicensed reselling is not. How Malaysian landlords should split an RP4 TNB bill across tenants, allocate capacity and network charges, and automate the invoices.

Jun 24, 2026Read
Power station cooling towers and stacks representing fuel-based electricity generation costTNB Bills & Tariffs

AFA Explained: Why Your TNB Bill Changes Monthly

The Automatic Fuel Adjustment is the line that moves your bill every month even when your tariff is fixed. How AFA works, how much it has swung, and the one lever you have.

Jun 8, 2026Read
Wall of commercial electricity meters representing maximum demand billingTNB Bills & Tariffs

Maximum Demand Charge: How RP4 Splits Your Bill

Maximum demand is billed on your worst half-hour of the month. Under RP4, the old MD charge split into a Capacity Charge and a Network Charge - here's how it works.

Jun 6, 2026Read
Digital power meters with Milesight LoRaWAN Modbus controllers in an electrical panelBMS & Building Technology

LoRaWAN Explained: Long-Range Wireless for Energy Data

LoRaWAN gets energy data off scattered meters with no cabling and no per-device SIM fees. How it works - in plain analogies - and why it suits large-site energy monitoring.

Jun 5, 2026Read
Rows of solar panels in a field under a blue skyTNB Bills & Tariffs

What Is KWTBB in Your TNB Bill? The 1.6% Explained

That small 1.6% KWTBB line on your bill is the Renewable Energy Fund levy. What it funds, who pays it, and the 2025 change that lets some businesses stop paying it.

Jun 5, 2026Read
White HVAC supply air ductwork below a building roofHVAC & Chiller Plants

Air-Side HVAC Efficiency in Malaysian Buildings

Chiller plants get the attention, but the air side - fans, ducts, AHUs, FCUs - runs its own energy bill and decides comfort. Where air-side energy goes, and how to cut it.

Jun 5, 2026Read
Weathered, empty industrial interior with light through aged windows, entropy at work in a buildingThe Essay Series

The Second Law of Buildings: Why Buildings Decay

A building is a structure in a slow, constant argument with entropy. On the physics of why everything you operate is quietly falling apart - and what it means to fight it.

Jun 4, 2026Read
Rooftop chiller plant with air-cooled chiller units and chilled water pipingHVAC & Chiller Plants

Chilled Water Delta-T: The Key to Better kW/RT

Delta-T is the hidden lever on chiller plant efficiency. Here is why it decides kW/RT, what causes low delta-T, and how to tune a plant for the best efficiency.

Jun 4, 2026Read
Kuala Lumpur commercial building skyline representing a multi-site property portfolioEnergy Monitoring & Analytics

Multi-Site Energy Management: One Screen for Every Building

Running a portfolio means seeing every building on the same terms at once. Multi-site energy management is the difference between knowing which sites waste money and guessing.

Jun 3, 2026Read