Just on this, depending on location there are "rules of thumb" based on hours of sunlight, cloud cover etc. Where I live the rule of thumb is 4. So 1 KW of pan

Just on this, depending on location there are "rules of thumb" based on hours of sunlight, cloud cover etc. Where I live the rule of thumb is 4. So 1 KW of panels will make around 4kWh a day, averaged over the year or about 1460 a year.