E3/DC S10 Xflex

Name: E3/DC S10 Xflex
Brand: E3/DC
Author: JouleSpecs

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Data from official source

Sheet curated by JouleSpecs — We check every spec sheet against the manufacturer's own documentation: each value carries its source and the date we read it. Published Oct. 21, 2026 · Last updated Oct. 22, 2026

The E3/DC S10 Xflex is an all-in-one home storage system with an integrated inverter and three-phase supply. When the grid fails it provides emergency power in island mode, three-phase, and it can keep recharging from solar even then. Capacity can be expanded up to 47.2 kWh. It includes 360° energy management with free updates, complies with §14a EnWG with integrated EEBUS, and supports solar charging with the E3/DC Wallbox. The system comes with a 10-year warranty.

01 · Verified data

Technical specifications

Parameter	Value	Source
Expandable	Yes	Compiled by editorial team
Maximum expanded capacity	47.2 kWh	Compiled by editorial team
Continuous output	15000 W	Compiled by editorial team
Phases	Three-phase	Compiled by editorial team
Backup phases	Three-phase	Compiled by editorial team
EV charger integration	Yes	Compiled by editorial team
Warranty	10 anni	Compiled by editorial team
Open protocols	EEBus	Compiled by editorial team

02 · The numbers

What it really costs

Battery life cycles 3650 cycles warranty years

the manufacturer does not state the guaranteed total energy throughput, which for heavy users is often the limit that runs out first

How we worked it out

warranty years: 3650

These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.

03 · Summary

Pros and cons

In favour

Powers the home in an outage on three phases, in island mode, and recharges from solar even during the blackout.
Capacity can be expanded up to 47.2 kWh, so the storage can grow with the home.
The system has a 10-year warranty.
EEBUS is integrated and it complies with §14a EnWG; the 360° energy management receives free updates.