How much usable energy does the sonnen sonnenPro Compact 261 store?

245 kWh (datasheet, cdn.prod.website-files.com, read 28 Oct 2026), for this configuration: Single all-in-one outdoor cabinet incl. 125 kW inverter; optional sonnenPro Backup box (125 kW critical load, <=20 ms).

What is the round-trip efficiency of the sonnen sonnenPro Compact 261?

93.8 % (DC) (datasheet, cdn.prod.website-files.com, read 28 Oct 2026). DC means the battery alone, without the inverter.

What warranty does the sonnen sonnenPro Compact 261 have?

10 years, 8,000 cycles, 60 % of capacity at the end (datasheet, cdn.prod.website-files.com, read 28 Oct 2026). The warranty document's own terms decide which limit comes first.

Does the sonnen sonnenPro Compact 261 include an inverter?

Yes, it has an integrated power conversion system (PCS) rated 125 kW (datasheet, cdn.prod.website-files.com, read 28 Oct 2026).

How much does the sonnen sonnenPro Compact 261 cost?

No public price listing was found for it when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

sonnen

sonnenPro Compact 261

Q: What is the round-trip efficiency of the sonnen sonnenPro Compact 261?

93.8 % (DC) (datasheet, cdn.prod.website-files.com, read 28 Oct 2026). DC means the battery alone, without the inverter.

Q: What warranty does the sonnen sonnenPro Compact 261 have?

10 years, 8,000 cycles, 60 % of capacity at the end (datasheet, cdn.prod.website-files.com, read 28 Oct 2026). The warranty document's own terms decide which limit comes first.

Q: Does the sonnen sonnenPro Compact 261 include an inverter?

Yes, it has an integrated power conversion system (PCS) rated 125 kW (datasheet, cdn.prod.website-files.com, read 28 Oct 2026).

Q: How much does the sonnen sonnenPro Compact 261 cost?

No public price listing was found for it when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

Single all-in-one outdoor cabinet incl. 125 kW inverter; optional sonnenPro Backup box (125 kW critical load, <=20 ms).

sonnen GmbH (Shell group); LFP cells, maker not named; liquid cooling (R513A). Same headline rating as E3/DC qntm.

Short answer

The sonnen sonnenPro Compact 261 is an LFP C&I battery cabinet (as specified: Single all-in-one outdoor cabinet incl. 125 kW inverter; optional sonnenPro Backup box (125 kW critical load, <=20 ms)). Usable energy: 245 kWh. Max. discharge power: 125 kW. Round-trip efficiency: 93.8 % (DC). Warranty: 10 years.

Each figure is in the table below with its source and the day it was read.

Specifications

Spec	Value	Source
Chemistry	LFP	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Usable energy	245 kWh	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Nominal energy	261 kWh	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Max. discharge power	125 kW	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Max. charge power	125 kWInverter nominal charge/discharge power (AC)	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
C-rate	0.48 Cderived: 125 kW / 261 kWh nominal	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Round-trip efficiency	93.8 % (DC)'Gesamtwirkungsgrad Batterie 93,75 %'; inverter max 98.5%	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Depth of discharge	93.9 %derived: 245 / 261 kWh	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Cycle life	unavailable	Not published
Warranty	10 yearsProduct warranty complete system (excl. inverter) 10 years; inverter 5 years	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Warranty cycles	8,000 cycles'Leistungsgarantie Batterie: 8.000 Zyklen bei 60 % SoH'; web FAQ: >=60% after 10 years or 8,000 cycles	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Warranty throughput	unavailable	Not published
Capacity at end of warranty	60 %	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Nominal voltage	unavailable	Not published
Operating temperature	−30 to 55 °CPossible power reduction >45 C	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Dimensions (W × D × H)	980 × 1,300 × 2,435 mm	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Weight	2,400 kg	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Ingress protection	IP55System enclosure IP55, battery modules IP67; C3 (C5 optional)	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Integrated inverter (PCS)	Yes, 125 kW	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Scalability	Up to 10 systems cascaded in grid-parallel operation (max derived 10 x 261 kWh)	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Certifications	IEC 63056, IEC 62619, IEC 62477-1, IEC 62109-1, IEC 62109-2, UN 38.3, UL 9540A (module level), VDE-AR-E 2510-50, EN 50549-1, EN 50549-2, VDE-AR-N 4105, VDE-AR-N 4110, CEI 0-21, CEI 0-16, UNE 27001, UNE 217002, NTS 63, C10/11 (Type B)Grid-code designations copied verbatim from datasheet ('UNE 27001', 'NTS 63' as printed)	cdn.prod.website-files.comDatasheet · read 28 Oct 2026
Compatible inverters	unavailableN/A: integrated PCS	Not published

Datasheetcdn.prod.website-files.comdated 2026-10 · read 28 Oct 2026

sonnen.pro · compact

Notes

Regions inferred from grid codes in datasheet (DE, IT, ES, BE) and sonnen.pro NL site; not confirmed per-country availability.

Sold in: DE, NL, BE, IT, ES

Prices

No public price listing was found when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

Questions

How much usable energy does the sonnen sonnenPro Compact 261 store?: 245 kWh (datasheet, cdn.prod.website-files.com, read 28 Oct 2026), for this configuration: Single all-in-one outdoor cabinet incl. 125 kW inverter; optional sonnenPro Backup box (125 kW critical load, <=20 ms).
What is the round-trip efficiency of the sonnen sonnenPro Compact 261?: 93.8 % (DC) (datasheet, cdn.prod.website-files.com, read 28 Oct 2026). DC means the battery alone, without the inverter.
What warranty does the sonnen sonnenPro Compact 261 have?: 10 years, 8,000 cycles, 60 % of capacity at the end (datasheet, cdn.prod.website-files.com, read 28 Oct 2026). The warranty document's own terms decide which limit comes first.
Does the sonnen sonnenPro Compact 261 include an inverter?: Yes, it has an integrated power conversion system (PCS) rated 125 kW (datasheet, cdn.prod.website-files.com, read 28 Oct 2026).
How much does the sonnen sonnenPro Compact 261 cost?: No public price listing was found for it when this database was compiled (28 Oct 2026). Zorowatt does not estimate prices.

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