Philippine solar learning hub
Understand household electricity use
Start with meter-based kWh and several months of bills, then estimate major appliances from wattage, quantity, hours, operating pattern, and the actual blended electricity rate. This produces a stronger baseline for efficiency and solar decisions.
Direct answers to the main questions
What is kWh?
A kilowatt-hour measures energy. A 1,000-watt load running for one hour uses about 1 kWh before accounting for cycling or variable power.
Why use bill history?
One month can be distorted by weather, occupancy, billing duration, rate changes, or unusual appliance use. Several months reveal a more stable range.
How accurate is an appliance estimate?
Accuracy depends on the actual power draw and duty cycle. Nameplate wattage is a starting point; plug meters, inverter monitoring, or measured bill changes can improve the estimate.
Read the supporting guides
Understanding an electricity bill
Read your bill properly before using it to justify solar or appliance decisions.
Read the guideHigh-consumption appliances
Identify which household appliances are most likely driving your electricity cost.
Read the guideAir-conditioner electricity costs
Estimate realistic cooling costs and avoid common assumptions about inverter savings.
Read the guideUse the tools with the same assumptions
Keep bill history, electricity rate, daytime use, shading, target, and equipment assumptions consistent. Changing one input between tools can make the outputs look contradictory even when each calculation is working as designed.
Sources, scope, and limits
This hub organizes educational content and does not replace a site survey, electrical design, structural review, current utility confirmation, or a complete written quotation.