https://go.solsenergy.com/subscription

Read their FAQ site,

Deposit of rm1500, then they will pasang solar panel on your roof

Then whatever the solar panel generate, you pay at a rate of rm0.46 per kWh.

This is cheaper than tnb highest tariff of rm0.57/kWh.

But rm1500 deposit, consider it burn since u wont dismantle the panels anyways, so dunno how long can ROI

U still have to pay tnb for whatever u use exceeding the solar generation