Battery storage for home and business
The sun delivers the most at midday – yet power is often used in the morning and evening. Battery storage closes this gap and turns your PV system into a round-the-clock supply.
Why a storage?
A storage is far more than a supply of electricity: it is the economic heart of a modern energy concept.
Without storage, households typically use only around a third of their solar power themselves – the rest flows into the grid. With an appropriately sized storage, self-consumption rises significantly, and every kilowatt-hour used yourself replaces expensive grid electricity.
Many systems can be equipped with a backup or emergency power function: in the event of a grid outage they keep selected loads or the entire building supplied – from the fridge to the server system.
Often the biggest lever for commercial businesses: the storage absorbs short consumption peaks and thus reduces the demand charge in the grid fee – entirely without interfering with your production processes.
Storage in figures
Typical industry values for current lithium storage systems – we calculate the specific design individually for your project.
The right size
From the compact wall-mounted unit to the storage container: what matters is not the largest battery, but the one that fits your load profile.
| Criterion | Home storage | Commercial storage |
|---|---|---|
| Typical capacity | approx. 5–20 kWh | from approx. 30 kWh up to the MWh range |
| Primary goal | Increase self-consumption, boost independence | Peak shaving, self-consumption optimisation, securing charging infrastructure |
| Installation | Basement, utility room, garage | Utility room, warehouse or outdoor container |
| Backup / emergency power | Optional for selected circuits or the whole house | Protection of critical processes and IT possible |
| Economic lever | Replaced grid draw per kilowatt-hour | Demand charge, grid fees and atypical grid usage |
Storage and e-mobility complement each other ideally: battery-buffered systems relieve the grid connection and enable fast charging even where the grid reaches its limits – find out more under battery-buffered fast chargers (DC/DC).
Technology & sustainability
We rely on tested systems from established manufacturers – and think about sustainability beyond the first life cycle.
Together with our partner Käfer Batteriesysteme, we rely on second-life concepts: batteries that have reached the end of their service life in a vehicle continue to provide valuable service as stationary storage for many years – resource-friendly and economically attractive.
Get to know our partnersWith Deye ESS we trust an internationally established manufacturer of hybrid inverters and storage systems – scalable from the single-family home to commercial applications and with well-thought-out energy management.
Get to know our partnersWe analyse your load profile and size your storage so that it pays off – for the home as well as for your business.