Find the Power Station That Fits.

Tell us what you are powering and for how long. We size it, in ringgit, with no enquiry form in the way.

  1. 1Scenario
  2. 2Appliances
  3. 3Runtime
  4. 4Result
Where will you use it?

1. Appliance figures are typical Malaysian household ratings, for sizing only. Start-up surge on a compressor can reach three times the running figure, which is what decides whether a unit starts a load at all.

2. Assumes 85% inverter efficiency and a full charge. Actual runtime varies with load, ambient temperature and battery age.

Questions? Answers.

Why does it recommend a smaller unit than I expected?
Because it applies a duty cycle. A fridge is rated 150 W but its compressor cycles, so across twelve hours it averages nearer a third of that. Nameplate arithmetic — watts times hours — overstates a fridge roughly threefold, and that is how most people end up two rungs larger than they need.
It says a unit has the power but not the runtime. What does that mean?
Two different limits. Power is watts: whether the inverter can carry the load and start the motors at all. Runtime is watt-hours: how long it lasts. A unit can comfortably run your load and still be flat in two hours, which is when an extra battery is the cheaper answer than a bigger station.
Why is startup surge treated separately?
Anything with a compressor — a fridge, a pump, a non-inverter aircon — draws far more for the first second than it does running. A non-inverter aircon pulls roughly three times its rated load at startup. That spike, not the running watts, decides whether it starts.
Can solar keep it topped up through an outage?
Not reliably, and the tool does not assume it. Kuala Lumpur averages 4.5 peak-sun hours a day, but on a heavy monsoon day a panel makes about a quarter of that. Solar is weakest during exactly the storm that takes the grid down, so the runtime figure stands on battery alone and solar is shown separately.
Where do the solar payback figures come from?
The TNB Domestic Tariff A schedule under RP4, run twice — once on your current consumption and once on the reduced figure — so the efficiency-rebate band jumps are captured rather than averaged away. Generation uses the Global Solar Atlas PVOUT value for the Klang Valley, which already includes system losses.
Why does the recommended solar system stop at 5 kW?
Solar ATAP caps single-phase installations at 5 kW. It is a regulatory limit, not a roof or budget one, so for most Malaysian homes the size is close to decided for you and what actually varies is the payback.
I am already on NEM. Should I switch to ATAP?
No. Joining ATAP requires terminating an existing NEM contract, and NEM credited exports one-for-one where ATAP credits them at the energy charge only. Staying put is almost always worth more.
Can I talk to someone instead?
Yes, and past a certain size we would rather you did. Anything involving a transfer switch, a three-phase supply or a business load deserves a conversation rather than a slider.