Advanced energy management systems do not just save energy — they precisely manage electricity costs during the most expensive periods. Peak Demand Management is the strategy that Full Automation smart homes use to maximize ROI.
Understanding Thai Electricity Tariff Structure
PEA and MEA apply a TOU (Time-of-Use) Tariff: On-Peak covers Monday–Friday 09:00–22:00, with rates 30–50% above Off-Peak. Off-Peak covers all other times and public holidays at standard rates.
For homes with solar and BESS, the strategy is to charge BESS during Off-Peak (00:00–06:00) and discharge during On-Peak — especially Peak-of-Peak hours (13:00–16:00) when Bangkok midday heat drives maximum HVAC demand.
Peak Shaving with BESS
Peak Shaving reduces the volume of electricity drawn from the grid during peak hours by discharging stored BESS energy instead.
5–10 kWh BESS: suitable for typical residential Peak Shaving 10–20 kWh BESS: supports both Grid Backup and Peak Shaving simultaneously Predictive Peak Shaving algorithm: uses weather forecast data — when high noon temperatures are predicted, the system pre-plans discharge schedules to meet anticipated HVAC load spikes.
Smart Appliance Load Shifting
Flexible appliances are automatically commanded to Off-Peak hours: Washing machine: shifted from 20:00 (On-Peak) to 01:00 (Off-Peak) — 30–50% cost reduction per cycle Dishwasher: shifted to after 22:00 Water heater or Boiler: heat stored water during Off-Peak Electric Vehicle: Smart EVSE charging 02:00–06:00 reduces charging cost 60–70%
PEA Voluntary Demand Response Program
PEA operates a Voluntary Demand Response Program that compensates participating consumers with 15–20% discounts for reducing consumption during grid stress periods. Homes with automated EMS systems can participate without any manual intervention.
Peak Demand Management ROI
Full Peak Demand Management system combining BESS, Smart Appliance Integration, and DR Program participation: reduces On-Peak electricity costs 40–60%, achieves total annual electricity savings of 20–35%, and delivers a Payback Period of 3–6 years depending on BESS size and solar pricing.