Simplified Sizing Guide for Solar Pool Heating Systems
A. Measure and enter the overall pool length. Ft
B. Measure and enter the overall pool width. Ft
Rectangle Kidney / Free Form Oval Round 1.00 0.85 0.90 0.79
C. Enter a corresponding shape multiplier.
Check the orientation of the roof area with a compass, refer to the table
below and select a multiplier. Solar panels can face up to 30° East or West of
true South for optimum efficiency. Panels cannot face in a Northerly direction,
unless supported by a rack to elevate the system towards south.
South Facing East or West Facing Flat 1.00 1.25 1.10
D. Enter a corresponding orientation multiplier.
Determine the percentage of shade on the entire pool during the Solar Day
(9 am - 5 pm), refer to the table below and select a multiplier. If only a portion
of the pool shaded for part of the solar day, then a Shade Multiplier should be
extrapolated from the table (i.e., 50% of the pool shaded for 50% (4 hours) of
the solar day equals 25% or a multiplier of 1.10).
Indoor pools should use 100% shade multiplier.
No shade from 9am to 5pm 25% shade 50% shade 75% shade 100% shade 1.00 1.10 1.25 1.50 1.75
E. Enter a corresponding shading multiplier.
F. Enter a screen enclosure multiplier. (screen enclosure, use a 1.25 multiplier no screen enclosure, use a 1.00 multiplier)
G. Using the map above, find your location, then choose the two digit Sizing Factor. If you are located in between two or more numbers, use the average. When in doubt, use the larger number.
To run the estimator, click the "calculate" button .
This is the pool surface area in Square Feet. SqFt
This is the required square footage of solar panels. SqFt
This is number of 4' x 8' solar panels. panels
This is number of 4' x 10' solar panels. panels
This is number of 4' x 12' solar panels. panels
NOTE: These sizing guidelines assume use of a pool cover when night time temperatures are below 60°. If a cover is not used
during these conditions, the system must be over-sized by 75-100%.