All About Solar


How many panels should you get?

Determining the size of your solar energy system starts with a simple question: how many solar panels do I need? As most people want to produce enough energy to completely eliminate their electricity bill, the first step is determining what size solar system will produce enough power to meet your household consumption levels. Ultimately, you will be calculating how many kilowatt-hours of power you will need and finding the correct system size and number of solar panels to power your house

Some Tips:

  1. An average homeowner needs 28 to 34 solar panels to fully offset their electricity bill with solar
  2. The number of panels you need for your house depends on factors like location and panel performance

If the average household consumes about 10,400 kWh per year and we assume 250-watt solar panels, we can use the high and low panel production ratios to calculate how many solar panels are needed on average. Thus, the typical homeowner will need 28 – 34 solar panels to cover 100% of energy usage (dependent on location and roof size).

For those wondering how we estimated those numbers for energy consumption and required number of solar panels, here’s the breakdown. When you want to understand how much power you’ll need, start by looking at how many kilowatt hours (kWh) of electricity you use in a year. Most utilities provide you with your total power consumption for the last twelve months on your monthly bill. To offer some perspective, one kWh is 1,000 watts of power being used in an hour. So, if you have 20 lights in your home and they all use 50-watt bulbs, having every light on in your house for one hour would use up one kWh of electricity.


Reference: Energy Sage