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Modeled engineering scenario. Modeled engineering scenario. Customer, commissioning, bill and media evidence are not registered. Results are illustrative and require site-specific validation.
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Residential Case Study

Mont Kiara Terrace House: From RM780 to RM0 Monthly Bill

Mont Kiara, Kuala Lumpur
August 2024

Bill Reduction

100%

Annual Savings

RM 9,384

Payback

4.8 years

CO2 Offset

12.5 tons/year

Trexon Energy Team profile photo - Solar Installation Specialists
· Solar Installation Specialists

The Challenge

Tech-savvy family of 5 with heavy AC usage, home office, and EV charging. Monthly bill consistently exceeded RM780 despite energy-conscious behavior.

Monthly Bill (Before)

RM 782

Annual Cost (Before)

RM 9,384

Pain Points:

  • •24/7 AC in master bedroom and home office
  • •EV charging 3x per week (Nissan Leaf)
  • •Home theatre and gaming setup
  • •Bill increased 35% over 3 years
  • •Concerned about future tariff hikes

The Solution

System Size

10.4 kW

Installation Time

2 days

Solar Panels:

Longi Hi-MO 6 (520W, 26 panels)

Inverter:

Sungrow SG10RT (10kW hybrid inverter)

Special Features:

  • Optimized panel layout for afternoon sun (west-facing roof)
  • Hybrid inverter enabling future battery add-on
  • Real-time monitoring via mobile app
  • EV charger integration for daytime charging

The Results

Monthly Bill (After)

RM 0

Annual Savings

RM 9,384

ROI

21% IRR

Environmental Impact:

12.5 tons/year (equivalent to planting 282 trees)

TNB Bill Breakdown Analysis

Before Solar

Energy Charge (1,180 kWh @ RM0.571)RM 673.78
Service Charge (TNB)RM 3.00
KWTBB (1% of energy)RM 6.74
1% GST ReplacementRM 6.83
ICPT Surcharge (Q4 2025)RM 91.40
TotalRM 782.00

After Solar

Energy Charge (45 kWh @ RM0.218)RM 9.81
Service Charge (TNB)RM 3.00
Solar ATAP Export Credit (-53 kWh)-RM 11.55
Net BillRM 0.00
TotalRM 0.00

12-Month Performance

Jan
RM 745
RM 0
1280 kWh
Feb
RM 765
RM 0
1245 kWh
Mar
RM 782
RM 0
1310 kWh
Apr
RM 798
RM 0
1265 kWh
May
RM 815
RM 0
1290 kWh
Jun
RM 825
RM 0
1305 kWh
Jul
RM 812
RM 0
1295 kWh
Aug
RM 795
RM 0
1310 kWh
Sep
RM 778
RM 0
1275 kWh
Oct
RM 762
RM 0
1240 kWh
Nov
RM 748
RM 0
1165 kWh
Dec
RM 735
RM 0
1180 kWh
Before Solar
After Solar

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