This homeowner wanted to bring down a very high monthly electricity bill by installing solar panels for house use and reduce exposure to ongoing electricity costs.
Before Solar
What the Bill Showed
Billing period: 01.03.2026–31.03.2026 (31 days)
Total bill amount: RM269.50
NEM shown on bill: 允许
Key lines (Ringkasan Bil Anda):
Caj Semasa NEM: RM269.52
Pelarasan penggenapan: -RM0.02
Baki terdahulu: RM0.00
After Solar
What changed
Billing period: 01.03.2026–31.03.2026 (31 days)
Total bill amount: RM269.50
NEM shown on bill: Yes (bill shows “Caj Semasa NEM”)
Key lines (Ringkasan Bil Anda):
Caj Semasa NEM: RM269.52
Pelarasan penggenapan: -RM0.02
Baki terdahulu: RM0.00
How To Interpret This Result?
This comparison is “cleaner” because there’s no previous balance
In the before bill:
Baki terdahulu = RM0.00
That means the total RM1,213.35 mostly reflects that billing period’s charges (not old unpaid amounts). This makes the before/after total comparison more trustworthy than cases where the “before” month includes arrears.
Billing days differ (30 vs 31 days) — normalize per day
Use RM/day to compare fairly:
Before RM/day = 1,213.35 ÷ 30 ≈ RM40.45/day
After RM/day = 269.50 ÷ 31 ≈ RM8.69/day
Behaviour + seasonality can still change the bill
Even after solar, bills can move up/down based on:
Air-conditioning hours
School holidays (more people at home)
New appliances or changes in WFH habits
Best practice: compare multiple months before concluding your “typical” savings.
Tariff and bill format can change across years
Your newer bill includes notes indicating tariff calculation changes (effective from mid-2025). When comparing across years:
Always confirm the billing period,
And watch for any tariff/adjustment notes on the bill.
Key Takeaways For Homeowners
When there’s no previous balance, the
before/after bill comparison is clearer.
Always normalize by 每日金额（令吉/天 when
billing periods differ.
For a confident trend, use v2–6 months of bills (not just one month).
