Model your project savings and peak-demand reduction
Calculate ROIMaximum Demand Peak Shaving Calculator Malaysia
Estimate how much a Malaysian factory can save by using a battery (BESS) to reduce TNB maximum demand charges; solar mainly cuts energy charges and is not counted as a reliable MD saving. Use this as a first-pass model before Trexon builds a bank-ready dispatch simulation from your half-hourly load profile.
Typical opportunity
100-500 kW MD reduction
Best fit
MV General / MV ToU (C&I)
Data needed
12 months bills
Battery type
LFP BESS
Next step
Send your bills
Model your MD reduction
Adjust the assumptions from your latest TNB bill.
Where BESS wins
Use BESS for the peaks solar cannot always cover
Solar mainly cuts energy (kWh) charges and does not reliably lower the monthly MD peak. BESS becomes compelling when the same site has compressor starts, evening production, cleanroom loads, standby chillers or unpredictable spikes that keep resetting the monthly MD peak.
Factory start-up spikes
Cap short high-kW starts from motors, compressors, ovens and CNC lines before they set the month's MD.
TOU and RP4 exposure
Shift energy from solar or lower-cost periods into tariff windows where grid energy and MD exposure hurt more.
Board-ready savings case
Show finance teams the gap between solar-only, BESS-only and solar-plus-storage before committing CAPEX.
Frequently Asked Questions
What is maximum demand peak shaving?
Maximum demand peak shaving reduces the highest recorded 30-minute kW demand in a billing month. A BESS discharges during short peaks so the facility records a lower maximum demand charge on its TNB bill.
How is BESS sized for peak shaving?
BESS sizing starts with interval load data. Trexon checks the kW peak to reduce, how long each spike lasts, daily cycles, usable kWh, inverter rating, transformer constraints and backup requirements.
Can solar reduce maximum demand without BESS?
Not reliably. Solar mainly cuts energy (kWh) charges, because one cloudy half-hour can still set the month's maximum demand. A battery sized for peak shaving is what reduces maximum demand, especially when peaks happen outside solar hours or during cloud events.
Get a Full BESS Peak-Shaving Model
Send your latest TNB bill and Trexon will model solar-only, BESS-only and solar-plus-storage savings for your facility.
- Sizing from your 12 months of TNB bills and shift pattern
- Roof, switchboard and single-line diagram reviewed by our engineers
- Available incentives (GITA for solar, subject to MGTC verification) and Solar ATAP eligibility checked for your premises
- SEDA-registered PV Service Provider (RPVSP-2026/373) · SSM 201301044881 (1074704-D)
Related BESS and TNB Guides
BESS Malaysia
C&I battery storage for peak shaving, backup power and solar self-consumption
Maximum Demand Shaving
How Malaysian factories reduce TNB MD charges with control, solar and BESS
TNB RP4 Medium Voltage Tariff
Understand RP4 tariff changes and MD exposure for factories
TNB Time-of-Use Tariff
TOU windows, off-peak rules and how storage shifts electricity use