waterheaterspecs

Solar · tank and tankless backup

GREENoneTEC solar systems

The GREENoneTEC solar systems line holds five certified rating sets of solar water heating systems, 5 model numbers sold as GREENoneTEC, listed by GREENoneTEC Solarindustrie. Solar UEF values run from 3.3 to 11 and collector areas from 22.3 sq ft to 44.6 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 GREENoneTEC solar systems
Rating setSolar UEFCollector, sq ftCollector typeSolar tank, galBackupSystem
GREENoneTEC Double E1 model number, electric backup3.344.6Batch52tankDirect ICS
GREENoneTEC Double GT1 model number, gas backup6.744.6Batch51tanklessDirect ICS
GREENoneTEC HE1 model number, electric backup1122.3Batch40tankDirect ICS
GREENoneTEC L-Extra1 model number, electric backup3.325.7Batch51tankDirect ICS
GREENoneTEC L-GT1 model number, gas backup3.725.7Batch51tanklessDirect ICS

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

This partnerOther solar systems

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 ELHeliodyne 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 302JSunEarth C2-26T-40-TLGSunEarth C2-40T-50-TLGTychon FPS/HP 300Universal Solar Products C80-18Universal Solar Products D120-18GREENoneTEC Double EGREENoneTEC Double GTGREENoneTEC HEGREENoneTEC L-ExtraGREENoneTEC L-GT
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 ELHeliodyne 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 302JSunEarth C2-26T-40-TLGSunEarth C2-40T-50-TLGTychon FPS/HP 300Universal Solar Products C80-18Universal Solar Products D120-18GREENoneTEC Double EGREENoneTEC Double GTGREENoneTEC HEGREENoneTEC L-ExtraGREENoneTEC L-GT
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
GREENoneTEC Double E44.6 sq fteighth largest19 °F30004324
GREENoneTEC Double GT44.6 sq fteighth largest19 °F30004323
GREENoneTEC HE22.3 sq ft27th largest19 °F30004370
GREENoneTEC L-Extra25.7 sq ft23rd largest19 °F30004318
GREENoneTEC L-GT25.7 sq ft23rd largest19 °F30004079

Model numbers

The line covers 5 model numbers, first certified 2019-11-12 and most recently 2022-03-20.

Model numberBrandRating setModel nameFreeze limitCertified
Double EGREENoneTECDouble ESunPad19 °F2022-03-20
Double GTGREENoneTECDouble GTSunPad19 °F2022-03-20
HEGREENoneTECHESunPad19 °F2022-03-20
L-ExtraGREENoneTECL-ExtraSolPal Plus19 °F2019-11-12
L-GTGREENoneTECL-GTSolPal Plus19 °F2019-11-12

Nearest certified alternatives

Rating setCollector areaBackupSystem
AET DX-80-40compared with GREENoneTEC Double E−4.0 sq fttankIndirect Forced Circulation
Tychon FPS/HP 300compared with GREENoneTEC Double E−1.5 sq fttankDirect Thermosyphon
Universal Solar Products C80-18compared with GREENoneTEC Double E+9.3 sq fttankDirect Thermosyphon
AET FF-80-42compared with GREENoneTEC Double E−1.6 sq fttankDirect Thermosyphon
Sammler US200-42compared with GREENoneTEC Double GT+0.8 sq fttanklessIndirect Forced Circulation

Keep reading