If you’re considering residential solar, your TNB bill is the fastest way to estimate:
This guide walks you through the key parts of a typical TNB bill and shows real before/after examples (with image placement notes you can use when publishing).
“Quick note: Bills can change format and tariff rules over time. Always use the bill period dates shown on your own statement.”
When you send a bill to a solar consultant, these are the essentials we look for:
Why these matter: Solar savings are driven by energy usage patterns and how charges are computed—not just the final RM.
Look for “Tempoh Bil” (billing period).
Why it matters:
What to record:
Look for:
Common confusion: The total RM can include adjustments, past balances, or rebates/surcharges. That’s why you still need the breakdown section.
Your bill often shows the tariff label (examples seen in the images you provided):
Why it matters:
Some bills also note that there were tariff calculation changes effective a certain date (e.g., a note about changes starting July 2025). Treat this as a reminder to compare months carefully.
Look for “Ringkasan Bil Anda”.
Key lines to understand:
If your bill includes solar export via NEM, you may see:
Tip: When building a solar case study, record both:
A “good” before/after comparison needs three checks:
Weather and lifestyle matter. If the family used air-conditioning more (or someone started working from home), usage can rise—even after solar.
Compute:
Before solar:
After solar (NEM shown):
What to learn from this example:
The “before” total was inflated by a previous balance. For a fair comparison, consider comparing current charges as well.
Before solar:
After solar (NEM shown):
What to learn from this example:
No. For solar sizing and a first-pass ROI estimate, the essentials are:
Some bill summaries show NEM sections even when there’s no carried-forward credit at that time. The best way to interpret NEM impact is to compare multiple months and the breakdown on detailed pages.
Send 2–6 months of bills and tell us:
