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Solar Hot Water System sizing
- The most significant factor in determining the appropriate size of solar hot water system for your needs is the average amount of hot water your household consumes per day.
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Methods to determine the daily amount of Hot Water your household uses (from most accurate to least accurate)
- 2. Have a hot water meter installed
- 3. Use a Hot Water Usage Calculator tool
- 4. Use your water bill to estimate usage
- 5. Estimate 60 liters of hot water per day per person.
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The following guidelines can be used to determine system sizing:
- 1 Collector: 0 - 150 liters per day (1-3 person household)
- 2 Collectors: 150 - 350 liters/day (3-6 person household)
- 3 Collectors: 350 - 550 liters/day (6 or more people)
- 4 Collectors: 550 - 800 liters/day water usage
- Larger systems are available.
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In addition to daily water usage the following will all contribute to the optimum system configuration for your household:
- Amount of sunlight available to your collectors
- Tilt and orientation of roof, or mounting location
- Space available to mount collectors
- Predicted change in hot water usage over short to medium term
Contact us for help determining your daily water usage or detailed savings analysis specific to your location.