Battery Energy Storage Systems
Grid-scale battery storage deployed alongside — or independent of — PV installations. Maximise energy capture, stabilise grid frequency, and turn your asset into a revenue source.
Your energy, on your terms
A Battery Energy Storage System (BESS) is an electrochemical installation that stores electricity and releases it on demand. When paired with solar PV, it captures the energy that would otherwise be exported to the grid at low feed-in rates — and makes it available exactly when your consumption peaks or when grid prices are highest.
Eturn designs, installs, and operates BESS from 100 kWh residential-scale systems up to multi-tens-of-MWh grid-connected battery parks. Every project is delivered under a single EPC contract with a 20-year operational support agreement.
Store surplus solar energy produced during peak generation hours and deploy it precisely when grid demand — or your own consumption — is highest.
One technology, three deployment models
Battery storage transforms a passive energy asset into an active financial instrument.
Commercial & Industrial BESS
Containerised lithium-ion systems co-located with rooftop or field solar installations. Sized from 100 kWh to multi-MWh, these systems reduce demand charges and maximise self-consumption.
- LFP chemistry
- 10–20 year design life
- IP55 container enclosure
- BMS + EMS integration
Utility & Front-of-Meter BESS
Large-scale standalone battery parks or hybrid solar+storage plants connected directly to the medium- or high-voltage grid. Designed for frequency regulation and capacity markets.
- 1 MWh – 100+ MWh
- SCADA + grid code compliance
- Fire suppression system
- Remote monitoring 24/7
Integrated Solar + Storage
A single EPC contract covering PV design, inverter selection, DC-coupling architecture, and battery integration. One provider, one warranty, one point of contact.
- DC- or AC-coupled
- Hybrid inverter platforms
- SolarEdge / Fronius / SMA
- Unified monitoring portal
From feasibility to live monitoring
Eturn handles every phase under one roof — no handoffs between contractors, no coordination risk. Your project manager owns delivery from first meeting to final commissioning test.
Site & Load Analysis
We model your energy consumption profile, peak demand patterns, and existing PV generation data to right-size the system.
System Design
Technology selection, chemistry choice, and power electronics design delivered as a bankable technical package.
Permitting & Grid Connection
We manage all DSO/TSO applications, grid connection studies, and planning authority submissions across all three of our markets.
EPC Installation
Civil works, container placement, HV/LV cabling, commissioning, and grid export testing — all under a single fixed-price contract.
O&M & Monitoring
Live system telemetry, predictive maintenance alerts, and 24/7 NOC support for the full operational lifetime of the asset.
Four reasons every solar asset needs storage
Battery storage transforms a passive energy asset into an active financial instrument.
Capture What You Generate
Store surplus solar energy produced during peak generation hours and deploy it precisely when grid demand — or your own consumption — is highest.
Revenue Through Flexibility
Participate in frequency regulation, peak-shaving, and demand-response programmes. Your battery becomes a revenue asset, not just a backup.
Uninterrupted Operations
Black-start capability and island-mode operation keep critical loads running during grid outages — essential for logistics, agriculture, and industrial sites.
Arbitrage & Cost Control
Buy low, sell high. Charge overnight at low tariff rates, discharge during peak pricing windows. Measurable ROI from day one.
Let's size your battery storage system
Send us your energy bills and we'll deliver a free preliminary sizing report within 5 business days.