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If you want to install solar panels or off grid solar power system for your home, of all the things you have to figure out when planning a solar power system, how many solar panels you’ll need is a big one. Yet, all variables are interrelated and you can’t figure out how many panels you need unless you know some other important information first.You need to calculate how much power, in watts, you use on a daily basis. Your electric bill will be necessary for this. A lot of utilities actually break this down for you in your monthly statements.How Much Sunlight Do You Get Per Day?Another thing you’ll need to know is the average amount of peak sunlight you get per day. This means yearly average. So don’t think summer hours; many areas get great sun in the summer but you might not see it for what feels like a month in the winter. Be sure to calculate the average…and be conservative. There are online calculators to help you get this exact as well.How Many Solar Panels Do you Need?Once you know your average power consumption and the amount of sunlight you receive each day, you are ready to calculate how many solar panels you’ll need. It’s easy. First, divide the total watts you use each day by the hours of sun you receive. That is the number of watts you need to generate in one hour.Solar panels are rated in watts. For instance, 500 watt solar panels will produce 500 watts of power each hour of peak sunlight. Therefore, if you need to produce 300 watts of power each hour, you’ll need three 100W solar panels. Note that panel ratings vary, meaning you could choose three 100W panels, six 50W panels, or just one 300W panel.www.solarmodulesystem.com. was founded in 2006, which is a high-tech photovoltaic company. We specialize in the solar module, PV system project research, produce, sales and after sales service. Products get VDE. SGS. CE. CSA. MCS international certificates. From 10w~300w monocrystalline and polycrystalline solar panels pass test standard of IEC61215, IEC61730 & UL1703. Solar panel gets CEC from America California approval, solar system also pass America ETL. SunnyPower is strategic VIP partner of Taiwan Motech Inc. so provide powerful reassurance for high quality modules and quick delivery. SunnyPower can also offer OEM and ODM service.