You scan your QR code at the PAM machine scanner.
Yes can utilize any voucher you have.
But you won’t be getting any grab reward point.

You can also pay TNB using POS PAM and by getting the Shopeepay voucher. it's only 1 sen and rebate is RM1.10. I think minimum payment for TNB is RM10 at PAM. IF you ever live near PAM kiosk palce then it might be worth it to purchase the several shopeepay vouchers during sales day like 25th of each month or 1.1 (sometimes they dont release). It used to be a cashback of RM4 but been reduced to RM1.10  sadly

No more elinking for tnb??