Our 3-step guide to saving money on power bills: Step 1 - Going Solar Here is a simulation of your potential savings compared to the same usage without solar power. Please note that solar power systems produce 2 to 3 times more energy in summer than in winter, so your summer bills are a lot lower in the summer months. However, we have taken that into account, and the consumption data provided below are yearly averages. If you install a 5kW solar power system on your roof, which produces 22.5kWh per day, your production for the September-October billing period (61 days) will be 1372.5kWh. If