Representative site · Frozen distribution centre
Picture a frozen-food distribution centre that runs around the clock. Its refrigeration compressors draw a large, steady load — and a big slice of that consumption falls inside TNB’s 14:00–22:00 peak window, where each kilowatt-hour costs the most. The energy is unavoidable; the timing of when it’s bought is not.
Paying the peak rate for energy you could buy off-peak
Under Time-of-Use, energy in the peak window costs RM 0.3132/kWh against RM 0.2723 off-peak. Every kilowatt-hour the site pulls from the grid between 14:00 and 22:00 carries that premium — day after day, all year.
TNB ToU peak energy rate vs RM 0.2723 off-peak — a RM 0.0409 premium on every peak kWh.
How UniBess solves it
The same battery and EMS that defend the demand peak also shift energy in time — buy it cheap, use it dear.
Charge off-peak
Overnight, at the low off-peak rate, the battery fills up — alongside any surplus midday solar.
Discharge through the peak
From 14:00 to 22:00 the compressors run partly off the battery, so fewer kWh are bought at the peak rate.
Bank the spread
Every shifted kWh earns the peak-to-off-peak gap, net of round-trip losses — stacked on top of demand savings.
A bonus layer, earned every day
The compressors don’t change their schedule — the battery just changes when the energy was bought. The spread is small per kWh, but it adds up quietly across thousands of kilowatt-hours a month.
- ~800 kWh/day bought in the peak window
- At RM 0.3132 / kWh
- No timing flexibility
- Same 800 kWh charged off-peak
- Discharged through the peak
- Spread captured, ~90% round-trip
Is this your site?
Arbitrage rewards sites that use real energy during the peak window and have battery headroom to spare. You’ll likely benefit if:
- You run into or through the 14:00–22:00 peak window.
- A meaningful share of your energy is consumed at the peak rate.
- You have rooftop solar that overproduces at midday.
- Your battery has capacity beyond pure peak-shaving duty.
Where we're honest
Arbitrage is the topping, not the cake. We never size a battery for arbitrage alone in Malaysia — the price gap is too narrow. It earns its keep only as a bonus layer on a system already paying for itself through demand reduction.