Variables like weather, temperature, the age of your system and whether your panels are heavily soiled can affect how much power your solar system can produce. Generally, a 5kW solar system generates about 5,000 watts of Direct Current (DC) power. However, if you account for system lossesincurred by the above variables, you could potentially decrea. The number of solar panels required to generate 5 kilowatts of energy hinges on the efficiency of your panels. Typically, you would need about 18 panels, but GoGreenSolar panels can do the job with 13 panels.A 5kW solar kit from GoGreenSolar requires about 299 square feet of space. Solar panels with string converters need to be grouped together and facing the same direction. You'll want to consider whether this option is the right choice for you or if you'd be best served by solar panels with microinverters. Microinverters allow you to place panels in.