Factory Electricity Bill Analysis Are You Overpaying?

TOU (Time of Use) is a time-based electricity rate system. On-Peak (09:00-22:00, Mon-Fri) costs approximately 5.1 THB/kWh, while Off-Peak (22:00-09:00 plus weekends) costs approximately 2.6 THB/kWh. Unlike the normal flat rate charged throughout the day, TOU varies by time. Businesses using more electricity during daytime benefit more from solar panels since they generate power during expensive On-Peak hours.

Ft (Float time) is a fuel surcharge based on global fuel prices (natural gas, coal, etc.) used in electricity generation. Thailand's Energy Regulatory Commission (ERC) adjusts Ft every 4 months, causing bill fluctuations. Installing solar panels protects against this volatility since sunlight is a free energy source.

Factory electricity bills in Thailand vary by size and industry type. The average ranges from 150,000-500,000 THB/month for medium-sized factories. Shopping malls average 200,000-800,000 THB/month, office buildings 50,000-200,000 THB/month, and warehouses 30,000-100,000 THB/month. If your bill is above average, solar installation can significantly reduce costs.

Solar panels typically reduce electricity bills by 30-50%, depending on system size, available roof area, sunlight levels, and usage patterns. PPA (zero investment) models save approximately 10-30%, while EPC (self-investment) provides greater long-term savings. CapSolar will analyze your bill and design a system specifically suited to your business.

Factory electricity is calculated from 4 components: (1) Demand charge (peak kW x rate) (2) Energy charge (kWh x TOU on-peak/off-peak rate) (3) Ft variable surcharge (kWh x current Ft 0.1623 THB) (4) 7% VAT on the total. Combined, these form your monthly bill. Enter your numbers in the analyzer above to see your actual cost structure.