Photo: Stiebel Eltron
Ground sourceR290 / R452B
Stiebel Eltron WPE-I Plus
Ground-source (brine/water) · 8 models
Indoor brine-to-water units. The newer WPE-I 07.1 and 12.1 use R290 (38-40 dB(A)); the earlier WPE-I 07 to 17 Plus use R452B. Active and passive cooling need an accessory.
Grant lists
Grants depend on the exact model being on the official list. The counts below are the entries of this series we found in each list.
BAFA WEP (Germany)
14 models listed
14 models of this series are eligible in the BAFA Wärmeerzeuger-Portal, the list the German BEG heat pump grant depends on.
checked November 4, 2026 · See the entries
ZUM (Poland)
12 models listed
12 models of this series are on the Lista ZUM, which the Polish Czyste Powietrze grant requires.
checked November 4, 2026 · See the entries
Specifications
| Type | Ground-source (brine/water) |
|---|---|
| Heating output (datasheet) | 7–16.7 kW |
| Design heat load Pdesignh (35 °C) | 7–16.7 kW |
| SCOP at 35 °C | 4.79–5.4 |
| SCOP at 55 °C | 3.7–4.2 |
| Refrigerant | R290 / R452B |
| Outdoor sound power | 38–40 dB(A) |
| Max. flow temperature | – |
Heating output is the figure in the manufacturer's datasheet; the basis (nominal output at A7/W35 or B0/W35, or design heat load) differs between brands, so check the datasheet before comparing. * = design heat load Pdesignh at 35 °C from the BAFA portal.
Control and connectivity
| SG Ready | Yes (via ISG (SG Ready function)) |
|---|---|
| Modbus | Yes (TCP, via ISG Connect (built into the WPE-I .1 Plus 400 V models; external ISG Connect/web for the WPE-I 07-17 H 400 Plus)) |
| EEBUS | Not documented |
| Cloud API | not confirmed (MyStiebel) |
| §14a EnWG control | via relay input |
| Local interfaces | Modbus TCP (via ISG Connect (built into the WPE-I .1 Plus 400 V models; external ISG Connect/web for the WPE-I 07-17 H 400 Plus)), SG Ready (via ISG (SG Ready function)) |
Source: www.stiebel-eltron.ch/content/dam/ste/ch/de/downloads/kun... · www.tecalor.de/content/dam/tec/de/de/downloads/202505_Kom... · assets.stiebel-eltron.com/celum/Docs/originalFile/DOC-001... · www.stiebel-eltron.de/toolbox/content/docs/anleitungen/in...
Zerofy
Via SG ReadyZerofy has no native Stiebel Eltron integration yet, but this series has an SG Ready input: Zerofy can switch it through a Shelly relay on the SG Ready terminals.
Models in this series
Model codes as the manufacturer documents them. The official list entries, with their own naming, follow below.
Models on the BAFA list 14
Eligible in the BAFA Wärmeerzeuger-Portal on November 4, 2026. Anlagennummer is the entry's number in the portal; SCOP at 55 °C is derived from the portal's ηs value.
| Model | Anlagennummer | SCOP 35 °C | SCOP 55 °C | Sound | Refrigerant | SG Ready |
|---|---|---|---|---|---|---|
| WPE-I 07 H 400 Plus | 16011731 | 4.96 | 3.7 | – | R452B | Yes |
| WPE-I 07 HW 400 Plus | 16011744 | 4.96 | 3.7 | – | R452B | Yes |
| WPE-I 07.1 Plus H 230 | 16017040 | 5.21 | 4.05 | – | R290 | Yes |
| WPE-I 07.1 Plus H 400 | 16017039 | 5.21 | 4.05 | – | R290 | Yes |
| WPE-I 07.1 Plus HW 230 | 16017042 | 5.21 | 4.05 | – | R290 | Yes |
| WPE-I 07.1 Plus HW 400 | 16017041 | 5.21 | 4.05 | – | R290 | Yes |
| WPE-I 10 H 400 Plus | 16011732 | 5.09 | 3.83 | – | R452B | Yes |
| WPE-I 10 HW 400 Plus | 16011736 | 5.09 | 3.83 | – | R452B | Yes |
| WPE-I 12.1 Plus H 230 | 16017044 | 5.4 | 4.2 | – | R290 | Yes |
| WPE-I 12.1 Plus H 400 | 16017043 | 5.4 | 4.2 | – | R290 | Yes |
| WPE-I 12.1 Plus HW 230 | 16017046 | 5.4 | 4.2 | – | R290 | Yes |
| WPE-I 12.1 Plus HW 400 | 16017045 | 5.4 | 4.2 | – | R290 | Yes |
| WPE-I 13 H 400 Plus | 16011733 | 4.94 | 3.75 | – | R452B | Yes |
| WPE-I 17 H 400 Plus | 16011734 | 4.79 | 3.7 | – | R452B | Yes |
Models on the ZUM list 12
On the Lista ZUM on November 4, 2026, with the list's own device number.
| Model | ZUM id |
|---|---|
| WPE-I 05 H 400 Plus | PG-701014 |
| WPE-I 05 HW 400 Plus | PG-401015 |
| WPE-I 07 H 400 Plus | PG-201016 |
| WPE-I 07 HW 400 Plus | PG-001017 |
| WPE-I 07.1 Plus H 400 | PG-601364 |
| WPE-I 07.1 Plus HW 400 | PG-301365 |
| WPE-I 10 H 400 Plus | PG-801018 |
| WPE-I 10 HW 400 Plus | PG-601019 |
| WPE-I 12.1 Plus H 400 | PG-101366 |
| WPE-I 12.1 Plus HW 400 | PG-901367 |
| WPE-I 13 H 400 Plus | PG-401020 |
| WPE-I 17 H 400 Plus | PG-201021 |
Entries as published in the official lists on the date shown; names and numbers are copied verbatim. Check the list for your exact model before you order.
More Stiebel Eltron heat pumps
Sources
- Datasheet: www.stiebel-eltron.de/de/produkte/207183.techdata.pdf
- Product page: www.stiebel-eltron.de/de/produkte/heizen-und-kuehlen/waermepumpe/erdwaermepum...
- Control and connectivity: www.stiebel-eltron.ch/content/dam/ste/ch/de/downloads/kundenservice/smart-hom...
- Control and connectivity: www.tecalor.de/content/dam/tec/de/de/downloads/202505_Kompatibilitaetsliste_I...
- Control and connectivity: assets.stiebel-eltron.com/celum/Docs/originalFile/DOC-00119582.pdf
- Control and connectivity: www.stiebel-eltron.de/toolbox/content/docs/anleitungen/installation/ISG_Modbu...
- BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
- Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
- EEBUS certified devices – checked November 2, 2026
All figures are taken from the manufacturers' datasheets and the official BAFA and ZUM lists on the date shown and may have changed since. This is not grant advice – check the list and your grant conditions before you order. Zerofy is not affiliated with any of the manufacturers listed.
SG Ready is a label of the Bundesverband Wärmepumpe (BWP) e.V.; “Yes” means the manufacturer documents the two-input interface or declares it on the BAFA portal, not that the series carries the BWP label – the label list is at waermepumpe.de. EEBUS is a standard of the EEBus Initiative e.V.; Modbus is a registered trademark of Schneider Electric, licensed to the Modbus Organization. Product names, logos and photos belong to their manufacturers and are shown to identify the products. Grant data: BAFA Wärmeerzeuger-Portal and Lista ZUM (IOŚ-PIB) as of the dates shown; the SCOP at 55 °C in the BAFA tables is calculated by Zerofy from the portal's ηs value.
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