Hi.

I am interested in sizing solar water heating tank, and found a couple of rule of the thumb ways to calculate it:

a) 1.5 gallons (2 gallons in Sun Belt) of hot water storage for every solar panel's active area (aperture area) square foot.

b) 80 to 100 liters per person (21 to 26 gallons per person).

c) 1.5 to 2 times more than the daily hot water consumption.

I was wondering if you could comment on these, and if they are not correct advice some other method of calculating a tank size?

Thank you for the reply.

I am interested in sizing solar water heating tank, and found a couple of rule of the thumb ways to calculate it:

a) 1.5 gallons (2 gallons in Sun Belt) of hot water storage for every solar panel's active area (aperture area) square foot.

b) 80 to 100 liters per person (21 to 26 gallons per person).

c) 1.5 to 2 times more than the daily hot water consumption.

I was wondering if you could comment on these, and if they are not correct advice some other method of calculating a tank size?

Thank you for the reply.

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