A smaller bill from month one
Solar starts cutting what you buy from TNB as soon as the system is switched on.
GridSiniby ChargeSini
Sun on the roof. Less on the bill.
GridSini puts solar panels on your roof under TNB’s Solar ATAP programme. Your home runs on sunshine during the day, the extra earns credit on your bill, and you can add a battery or EV charger whenever you’re ready.
- Solar ATAP ready
- 10-year bill credits
- Battery and EV add-ons
How it works
How solar cuts your bill, in plain words.
No jargon. Your panels make power when the sun is up. Every unit you make is a unit you don’t buy from TNB, and anything you don’t use still earns you credit.
Daytime: your home uses solar first.
The fridge, aircon and water heater run on your own power while the sun is up. Every unit (kWh) you use this way is one you don’t pay TNB for.
Extra power earns bill credit.
Under Solar ATAP, TNB credits the power you send to the grid at the same energy rate you pay, for 10 years. Credits lower that month’s bill, up to what you bought from TNB. They don’t carry over.
Night-time: TNB or your battery.
After sunset you use TNB power as usual. Add a battery and the day’s leftover solar runs your evening instead.
Why switch
What you get with GridSini.
We’re the team behind ChargeSini’s EV charging network, so we already design, install and support electrical systems in Malaysian homes and buildings every day.
Less exposed to tariff changes
Power you make yourself carries no energy charge and no monthly AFA surcharge.
Charge your EV on sunshine
Pair solar with a ChargeSini home charger and top up your car with power from your own roof.
We handle the paperwork
System design, Solar ATAP application and TNB meter change are all part of the job.
Add a battery when you’re ready
Start with solar today. Add storage later to use more of your own power at night.
Built to last decades
Quality panels keep producing for 25 years or more with very little upkeep.
Plans
Three ways to go solar.
Every plan starts with a free roof check. We size the system to your bill and roof, then give you one fixed quote.
GridSini Solar
Rooftop solar that cuts your daytime usage and earns bill credit.
- Panels, inverter and mounting
- Solar ATAP application
- Installation and TNB meter change
- System check after switch-on
GridSini Solar + Battery
Store the day’s extra solar and use it after sunset.
- Everything in GridSini Solar
- Home battery storage
- Hybrid inverter
- Optional backup power during outages
GridSini Solar + EV
Charge your car with power from your own roof.
- Everything in GridSini Solar
- ChargeSini smart home wallbox
- Charger installation and wiring
- Schedule charging for sunny hours
Solar calculator
See what solar would save you.
Enter your usage. We estimate your bill with and without solar using TNB’s current domestic tariff and Solar ATAP credit rules.
Estimated savingsRM0 / month
See results ↓
What is Solar ATAP?
TNB’s rooftop solar programme for homes. Solar you use yourself lowers what you buy from TNB. Extra power you send to the grid is credited against the same month’s bill for 10 years.
Do unused credits carry over?
No. Credits only reduce the bill for the month they’re earned, and can’t go beyond the power you bought from TNB that month. That’s why sizing matters.
Do I need a battery?
No. Most homes save well with solar alone. A battery helps most if you use the bulk of your power in the evening.
Does solar work on cloudy days?
Yes, at lower output. Our estimates use an average of 3.5 peak sun hours a day, which already allows for Malaysian weather.
Will it work during a power cut?
A standard grid-tied system switches off during an outage for safety. For backup power you need a battery with a backup-capable inverter.
How big a system do I need?
It depends on your bill, when you use power and your roof. Use the calculator above for a starting point, then we confirm it at the free roof check.
Free roof check
Find out what your roof can do.
Enter your address and TNB bill, then point to your house on the map. Our solar team designs your panel layout from satellite and sends you a full proposal. No obligation.