waterheaterspecs

Solar · tankless backup

SunEarth solar systems

The SunEarth solar systems line holds two certified rating sets of solar water heating systems, 2 model numbers sold as SunEarth, listed by SunEarth. Solar UEF values run from 3.3 to 5.2 and collector areas from 26.9 sq ft to 41 sq ft.

Certified as of October 27, 2026 · EPA ENERGY STAR data, public domain · Compare in the Heater finder

Size by size

Certified values of SunEarth solar systems
Rating setSolar UEFCollector, sq ftCollector typeSolar tank, galBackupSystem
SunEarth C2-26T-40-TLG1 model number3.326.9Flat Plate40tanklessIndirect Forced Circulation
SunEarth C2-40T-50-TLG1 model number5.241Flat Plate50tanklessIndirect Forced Circulation

Solar UEF against collector area, these systems among all solar listings

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Solar UEF

Solar UEF against collector area, these systems among all solar listings051015202520304050607080Collector area, sq ftAET B-DBS-G2-80-64AET DX-120-64AET DX-80-40AET FF-80-42Dimas 300-3 ELGREENoneTEC Double EGREENoneTEC Double GTGREENoneTEC HEGREENoneTEC L-ExtraGREENoneTEC L-GTHeliodyne HF 1 406 G 40 AC S EHeliodyne HF 1 408 G 60 AC S EHeliodyne HF 1 410 G 80 AC S EMC Green B80-20Rheem RS120-64BP-TGRheem RS80-40BPRheem RS80-40BP-TGRheem RS80-48BPSammler A169Sammler US200-25Sammler US200-42Solahart ASE 302JTychon FPS/HP 300Universal Solar Products C80-18Universal Solar Products D120-18SunEarth C2-26T-40-TLGSunEarth C2-40T-50-TLG
Solar UEF against collector area, these systems among all solar listings051015202520406080Collector area, sq ftAET B-DBS-G2-80-64AET DX-120-64AET DX-80-40AET FF-80-42Dimas 300-3 ELGREENoneTEC Double EGREENoneTEC Double GTGREENoneTEC HEGREENoneTEC L-ExtraGREENoneTEC L-GTHeliodyne HF 1 406 G 40 AC S EHeliodyne HF 1 408 G 60 AC S EHeliodyne HF 1 410 G 80 AC S EMC Green B80-20Rheem RS120-64BP-TGRheem RS80-40BPRheem RS80-40BP-TGRheem RS80-48BPSammler A169Sammler US200-25Sammler US200-42Solahart ASE 302JTychon FPS/HP 300Universal Solar Products C80-18Universal Solar Products D120-18SunEarth C2-26T-40-TLGSunEarth C2-40T-50-TLG
Each circle is one system. Solar UEF values are shown as listed in the dataset.

Collector size among the solar listings

The median collector area of the 27 solar systems on the list is 40.6 sq ft. Solar UEF values are shown as listed and not ranked (see Test and data).

SystemCollector areaAmong the 27 solar systemsFreeze limitSRCC OG-300 number
SunEarth C2-26T-40-TLG26.9 sq ft22nd largest−30 °F30004363
SunEarth C2-40T-50-TLG41 sq ft13th largest−30 °F30004307

Model numbers

The line covers 2 model numbers, all certified 2022-01-12.

Model numberBrandRating setModel nameFreeze limitCertified
C2-26T-40-TLGSunEarthC2-26T-40-TLGCascade 2−30 °F2022-01-12
C2-40T-50-TLGSunEarthC2-40T-50-TLGCascade 2−30 °F2022-01-12

Nearest certified alternatives

Rating setCollector areaBackupSystem
GREENoneTEC L-GTcompared with SunEarth C2-26T-40-TLG−1.2 sq fttanklessDirect ICS
Sammler US200-25compared with SunEarth C2-26T-40-TLG+0.2 sq fttanklessIndirect Forced Circulation
Rheem RS80-40BP-TGcompared with SunEarth C2-26T-40-TLG−2.2 sq fttanklessIndirect Forced Circulation
Sammler A169compared with SunEarth C2-26T-40-TLG+0.2 sq fttanklessDirect Thermosyphon
Sammler US200-42compared with SunEarth C2-40T-50-TLG+4.4 sq fttanklessIndirect Forced Circulation

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