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solar water heaters - system size calculator

Try to size your solar water heater

This solar water heater calculator gives you a glimpse of the size of your system based on the number of people using hot water. It helps you understand the sizing process. However, this calculator is based on few parameters and the result may not be representative of your case. Please consult us for your project.

We carry pre-packaged solar water heater kits for most residential or small commercial applications. We can customize your solar water heater. For commercial applications or larger residential, a project may be required. Depending on the location, whether warmer or cold climate, we have a solar water heater for your application.

Enter the information required in the yellow fields:

Number of people using hot water?		persons
Solar fraction:		%
Select location		insolation level
(or enter insolation level based on solar map)
Entry water temperature		F
Desired water temperature		F

Calculation results:
System size (**)		gallons

Energy output:		kWh/day
# of evacuated tubes required (*)		tubes
... or # of flat-plate collectors (*)		collectors
Energy savings:		$/month
(based on $0.1/kWh USA average)

SpreadsheetConverter

NOTES:
This is a simple solar water heater calculator. Results may not be accurate for large number of people using hot water.
(*) Collectors: flat-plate or evacuated tubes collectors is a matter of choice;
(**) Storage tank : this is the minimum volume required;
Other items, like expansion tank, controller, circulating pump, drain-back tank or heat-dump, are or may be required, depending on project.

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solar water heaters - system size calculator