The Smart Solar SSG2-ES xx line holds three certified rating sets of split system heat-pump water heaters, 3 model numbers sold as Smart Solar, listed by Smart Solar Electric Heating. Rated volume runs from 65 to 120 gal, and the first-hour rating runs from 46 to 83 gal. UEFs compare only within a draw pattern; the one high-draw sets rate UEF 2.85. Smart Solar SSG2-ES 120 lists 1,741 kWh/yr, the highest of the 58 high-draw heat-pump sets. Smart Solar SSG2-ES 120 lists UEF 2.85, the lowest of the 58 high-draw heat-pump sets.
UEF ranks compare sets of the same draw pattern only.
Smart Solar SSG2-ES xx: first-hour rating against rated volume
Smart Solar SSG2-ES xxOther heat-pump sets
First-hour rating, gal
Filled: the three sets of Smart Solar SSG2-ES xx; open circles: the other 98 heat-pump sets. Dashed lines mark 1× and 1.5× the rated volume; the highest ratio in the line is 0.71×, on Smart Solar SSG2-ES 65.
Across the sizes
From Smart Solar SSG2-ES 65 to Smart Solar SSG2-ES 120, rated volume grows by 55 gal and the first-hour rating by 37 gal: 0.67 gal of first-hour output for each added rated gallon.
The sizes test at different draw patterns (one high, one low and one medium), so UEF and annual energy compare only between sizes that share a pattern (why).
Strongest placings, size by size
Measure
Value
Median of the group
Placing
Compared with
UEFSmart Solar SSG2-ES 65
2.52
3.10
lowest of 5
5 low-draw heat-pump sets
Rated electricity useSmart Solar SSG2-ES 65
893 kWh/yr
724 kWh/yr
highest of 5
5 low-draw heat-pump sets
UEFSmart Solar SSG2-ES 80
2.71
3.56
lowest of 38
38 medium-draw heat-pump sets
First-hour output per rated gallonSmart Solar SSG2-ES 80
0.69
1.25
lowest of 101, two tied
101 heat-pump sets
UEFSmart Solar SSG2-ES 120
2.85
3.88
lowest of 58
58 high-draw heat-pump sets
First-hour output per rated gallonSmart Solar SSG2-ES 120
0.69
1.25
lowest of 101, two tied
101 heat-pump sets
Model numbers
The line covers 3 model numbers, all certified 2024-01-23.