Battery Energy Storage Systems
Tired of High Maximum Demand Charges? BESS Is Your Fix
Battery storage that quietly charges up when power is cheap and kicks in right at your peak - so your Maximum Demand charges drop without changing a single thing about how your business runs.
EC Class A
CIDB G7
ISO 9001:2015 certified
SEDA registered installer
11:00am · Sunny
Solar runs your building for free, fills the battery, and sells the spare to TNB.
3:00pm · Peak hour
Your factory spikes. The battery covers it, so TNB records a lower Maximum Demand.
11:00pm · Off-peak
Power is cheapest. TNB refills the battery, ready for tomorrow's peak.
The Problem
Maximum Demand charges are climbing fast
TNB's 2025 tariff restructuring sharply increased Maximum Demand (MD) charges - billed on your single highest 30-minute usage spike, not your total consumption.
Before
RM 100k
Typical monthly MD charge for the same facility
2pm – 10pm
Weekday peak window where a single spike sets your MD charge
30 minutes
MD is billed on your highest 30-min block, not your total usage
Tens of thousands
What one uncontrolled spike can add to a single month's bill
Maximum Demand, Explained
Your TNB bill is set by your busiest 30 minutes
Cut that one peak with a battery, and the demand charge for the whole month drops.
What is Maximum Demand (MD)?
TNB averages your power use every 30 minutes. The highest one in the month is your MD. You pay RM97.06 for every kW of it.
How a battery cuts your MD
When your factory goes above the blue line, the battery supplies the extra. TNB never sees the peak, so it only bills you up to the line.
RM23,294
saved every month
MD 1,020 → 780 kW
Bill RM99,001 → RM75,707
Per year RM279,533
Example factory on TNB Medium Voltage ToU (RM30.19 capacity + RM66.87 network = RM97.06 per kW of MD). The battery charges off-peak, so your energy use (kWh) stays the same; the saving is on the kW demand charge. Actual savings depend on your load profile.
What Is BESS?
A large-scale battery, working like an industrial power bank
A Battery Energy Storage System stores electricity when it's cheap or plentiful, then releases it exactly when your site needs it most - a process called peak shaving. Modern lithium-ion systems run at 80–90% round-trip efficiency.
Store energy while it's cheap
The battery charges from solar generation or low-tariff grid power, building up reserve for the hours ahead.
Deploy it during your spike
When your load climbs toward a new Maximum Demand peak, the battery discharges automatically to flatten it.
How BESS Works
From solar and grid, to a cheaper bill
Solar / Grid
Energy flows in from your rooftop solar and the grid during off-peak hours.
Battery Storage
Your BESS stores that energy on-site, ready to use whenever you need it.
Smart Energy Management
Software decides when to charge, hold, or discharge - no manual switching.
Business Load
Stored power covers your peak, lowering your Maximum Demand.
Key Benefits
Six reasons businesses are adding BESS
Maximum Demand / Peak Shaving
Flatten your highest 30-minute spike, the single number your MD charge is based on.
Lower Energy Costs
Shift consumption away from your most expensive tariff periods automatically.
Energy Management
One system that reads your load profile and makes the charge/discharge call in real time.
Solar Energy Optimisation
Capture excess solar generation instead of exporting or curtailing it, and use every kWh on-site.
Backup / Energy Resilience
Keep critical loads running through short grid interruptions.
Fully Integrated System
Solar, battery and grid work as one - solar powers your site and charges the BESS, the BESS discharges to cut your peak, and the grid stays purely as backup and export credit.
The MAQO BESS Solution
A turn-key solution, start to finish
The same team that assesses your site designs, builds, and keeps your BESS running for as long as you own it.
Energy Analysis & Site Assessment
We study your load profile and TNB bill to size a system that pays for itself.
MAQO Invests & Builds
Our in-house, SEDA-qualified team designs, supplies and installs the system.
Operate & Maintain
We monitor and maintain the system for its full operating life.
You Save From Day One
Lower MD charges show up on your very next TNB bill.
Business Model
Two ways to fund your BESS
Own it outright
Direct Purchase
Buy your system with cash, a bank loan, or a credit facility, and keep 100% of your MD savings and long-term returns.
- Full ownership from day one
- Maximum long-term savings
- Still fully MAQO-installed & maintained
0% upfront cost
Zero CAPEX
Adopt BESS for your business with 0% upfront cost. MAQO invests in and builds the battery system at your site, so high energy savings start without touching your capital.
- MAQO invests in & builds the battery system at your site
- No upfront cost to get started
- Guaranteed savings and stronger operational resilience
- Worry-free maintenance, handled by MAQO
Talk to MAQO About BESS
Free site assessment - we'll show you exactly how much a battery system could cut from your Maximum Demand charges.