Commercial Solar Calculator Malaysia 2026: Estimate TNB Savings for Factory, Shop, Office & Warehouse
Commercial Solar Calculator Malaysia 2026: Estimate TNB Savings for Factory, Shop, Office & Warehouse
If your business pays a high monthly electricity bill, commercial solar may help reduce operating cost by using rooftop solar energy during business hours.
This Solar100 Commercial Solar Savings Calculator helps Malaysian business owners estimate the possible solar system size, monthly TNB bill savings, installation cost range and payback period before requesting a proper commercial solar quotation.
It is suitable for factories, warehouses, shoplots, offices, clinics, schools, showrooms, commercial buildings and other business premises with regular daytime electricity usage.
Commercial solar is usually worth checking when a business has a consistent monthly TNB bill, suitable roof space and electricity usage during the day. Businesses that operate during daylight hours may benefit more because solar generation can directly offset daytime electricity consumption.
Use the calculator below to estimate your commercial solar potential and send the result to Solar100 WhatsApp for a basic suitability check.
Solar100 Commercial Solar Savings Calculator
Fill in a few simple business details. The calculator will estimate suggested solar size, monthly savings, investment range and payback period.
Your area helps Solar100 check suitable commercial solar installer options near your location.
Your contact number will be included in the WhatsApp message for follow-up.
Business type affects operating pattern and the estimated solar savings range.
Enter your average monthly business electricity bill. Example: RM3,000, RM8,000, RM20,000 or RM50,000.
Solar generates electricity during the day. Businesses with stronger daytime usage usually have better self-consumption potential.
Roof size affects the maximum possible solar system size. Final design requires roof assessment.
After clicking the button, WhatsApp will open with your estimated result. Please review the message and tap send so Solar100 can help check your commercial solar suitability.
Estimated Monthly TNB Savings:
RM --Commercial Solar Advice
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This is a simple commercial solar estimate only. Actual savings and system size depend on tariff category, load profile, maximum demand, roof structure, application requirements, engineering design and installer quotation.
Is Commercial Solar Worth It for Your Business?
Commercial solar is often more attractive when a business uses electricity during the day. This is because solar panels generate electricity while factories, offices, shops and warehouses are operating.
Businesses with high daytime usage may be able to offset part of their TNB bill through rooftop solar generation. However, the final suitability depends on roof condition, roof size, operating hours, electricity load profile, tariff category and the proposed system design.
This calculator gives a starting estimate only. Commercial and industrial solar projects require a more detailed assessment, especially for larger factories, high-voltage users, maximum demand charges, roof loading, engineering design and application requirements.
Commercial Solar Size Guide by Monthly TNB Bill
| Monthly TNB Bill | Solar Size to Start Checking | Suitable Business Type |
|---|---|---|
| RM3,000 – RM5,000 | 20kWp – 50kWp | Shoplot, small office, clinic, small commercial premise |
| RM5,000 – RM15,000 | 50kWp – 150kWp | Medium shop, office, showroom, education centre, small factory |
| RM15,000 – RM50,000 | 150kWp – 500kWp | Factory, warehouse, larger commercial building |
| RM50,000 and above | 500kWp and above | Large factory, logistics warehouse, industrial facility |
The table above is only a starting reference. The actual solar size may be smaller or larger depending on roof space, self-consumption, grid connection, maximum demand and system design.
Which Businesses Should Consider Commercial Solar?
Commercial solar may be worth checking if your business has a steady electricity bill and uses power during daylight hours. The following business types often have potential:
- Factories and manufacturing facilities
- Warehouses and logistics centres
- Shoplots, retail shops and restaurants
- Offices and commercial buildings
- Schools, tuition centres and education centres
- Clinics, medical centres and service businesses
- Showrooms and car service centres
- Agricultural or processing facilities with daytime operation
What Affects Commercial Solar Savings?
Commercial solar savings are not based on bill amount alone. A proper commercial solar proposal should evaluate the actual load profile, roof condition, proposed system size and financial payback.
- Monthly TNB bill and electricity usage pattern
- Daytime operating hours
- Roof size, roof type and roof condition
- Shading from neighbouring buildings or roof structures
- Solar panel and inverter design
- Electrical protection and system monitoring
- Maximum demand and tariff category, where applicable
- Application, engineering and compliance requirements
- Workmanship warranty and after-sales support
- Expected payback and long-term TNB savings
Already Received a Commercial Solar Quote?
If your business has already received a commercial solar quotation, you should check whether the proposed system size, investment amount and projected savings are reasonable for your TNB bill and operating profile.
How Solar100 Can Help Businesses
Solar100 helps Malaysian businesses understand whether commercial solar is worth comparing before requesting quotations. After using the calculator above, your WhatsApp message will include business type, location, monthly bill, estimated solar size, expected savings, investment range and payback range.
This helps Solar100 check:
- Whether your business bill is suitable for commercial solar
- What solar system size you should start comparing
- Whether your roof size may limit the system capacity
- Whether your business should request a site assessment
- What questions to ask before signing a commercial solar proposal
Want to Estimate Commercial Solar Savings for Your Business?
Use the calculator above and send your result to Solar100 WhatsApp. We can help you do a basic commercial solar suitability check before you request installer quotations.
Jul 03,2026