SolaX Battery Storage Installation — Installed by Omni3
The SolaX X1-Hybrid G4 and X-ESS G4 system — a proven, practical hybrid solar and battery solution for UK homes. Reliable, well-supported and designed to maximise solar self-consumption. Installed by NICEIC approved Omni3 across West Sussex and the South East.
Real project: We installed a SolaX hybrid inverter and 10.2 kWh battery in Peacehaven, East Sussex — achieving an estimated 70–90% solar self-consumption and £800–£1,200 annual savings.
Read the case studyProven hybrid solar and battery storage
SolaX has been one of the most widely installed hybrid inverter brands in the UK for several years. The X1-Hybrid G4 range represents the current generation — a mature, well-supported hybrid inverter available in 3.0–7.5 kW single-phase models, designed to manage solar generation, battery charging and grid export from a single unit.
The X-ESS G4 system packages the inverter with a matched LFP battery and the Matebox — a smart connection point for EV chargers, heat pumps and backup power circuits. It is a pre-designed, pre-matched system that reduces installation complexity and guarantees component compatibility.
For homeowners wanting a practical, reliable solar battery system with EV charging integration and good long-term support, SolaX is one of the strongest options available.
What the SolaX X-ESS G4 delivers
A practical, proven system — designed to maximise solar self-consumption and reduce grid reliance without unnecessary complexity.
X1-Hybrid G4 Inverter
The SolaX X1-Hybrid G4 is available in 3.0–7.5 kW single-phase models. As a true hybrid inverter, it manages solar generation, battery charging and grid export simultaneously through a single unit.
X-ESS G4 Complete System
The X-ESS G4 packages the X1-Hybrid inverter, battery and Matebox (for smart AC connections including EV charger and heat pump) into a pre-matched system — reducing installation complexity and ensuring component compatibility.
Smart EV Charger Integration
Through the Matebox and SolaX's smart charging protocol, the system coordinates EV charging with solar generation and battery state — prioritising surplus solar energy before drawing from the grid.
Octopus & Time-of-Use Tariff Support
The inverter supports automatic charging on Octopus Agile, Go and other TOU tariffs — charging the battery overnight at low rates and discharging during the day and evening peak.
Backup Power Mode
The X1-Hybrid G4 supports an EPS (Emergency Power Supply) mode, providing power to selected circuits during a grid outage. The Matebox enables clean EPS wiring for designated backup loads.
Proven Reliability
SolaX has been one of the most widely installed hybrid inverter brands in the UK for several years. Parts availability, firmware stability and support infrastructure are well established — reducing long-term maintenance risk.
NICEIC Approved • Free Survey • 0% VAT
Interested in SolaX battery storage?
Free survey across West Sussex and the South East.
Who SolaX battery storage is best suited to
Solar panel owners adding battery storage
The X1-Hybrid G4 is designed to work with new solar installations or to replace an existing string inverter — making SolaX an excellent choice for homeowners looking to retrofit battery storage to an existing solar system.
Households on time-of-use tariffs
SolaX's Octopus integration allows automatic overnight charging at low rates and discharging during peak periods. For Agile and Go users, this tariff arbitrage adds meaningful savings on top of solar self-consumption.
EV owners wanting solar-to-vehicle charging
Through the Matebox and SolaX's smart charging coordination, surplus solar energy can be routed directly to your EV charger — minimising what you pay to charge your vehicle.
Buyers wanting a proven, well-supported system
SolaX has been installed in large numbers across the UK for several years. Parts availability, firmware updates and installer support infrastructure are well established — making it a lower-risk long-term choice.
SolaX Battery Storage & 0% VAT
Battery storage systems installed at residential properties — including SolaX X-ESS G4 — currently qualify for 0% VAT, whether installed alongside solar panels or as a standalone addition. The rule change in February 2024 extended the 0% rate to standalone battery installations.
All Omni3 proposals for residential battery storage reflect the correct 0% rate. The price in your quote is the price you pay.
Battery Storage VAT Guide — Full Eligibility RulesSolaX battery storage — common questions
What is the SolaX X-ESS G4 system?
The SolaX X-ESS G4 is a pre-matched system comprising the X1-Hybrid G4 inverter, a compatible LFP battery pack and a Matebox — a smart junction box that simplifies connections for EV chargers, heat pumps and backup power circuits. Buying as a matched system removes the compatibility guesswork and typically reduces installation time.
Can SolaX battery storage be retrofitted to my existing solar panels?
Yes. The X1-Hybrid G4 can be installed as a replacement for an existing string inverter, converting a solar-only system to a solar-plus-battery setup. It can also be AC-coupled to some existing hybrid setups. We assess compatibility during a free site survey.
How does SolaX integrate with an EV charger?
The Matebox includes smart relay outputs that coordinate with the SolaX inverter and a compatible EV charger. The system detects surplus solar generation and routes it to your vehicle first, before drawing from the grid — reducing your EV charging cost significantly.
Does SolaX battery storage qualify for 0% VAT?
Yes. Battery storage systems installed at residential properties currently qualify for 0% VAT — whether installed as part of a new solar system or as a standalone addition. All Omni3 proposals apply the correct 0% rate automatically.
Is SolaX a reliable choice for the long term?
SolaX has been one of the most widely installed hybrid inverter brands in the UK for several years. Parts availability is good, firmware is actively maintained and the installer support network is well established. For households wanting a proven, practical system rather than the newest technology, SolaX is a strong choice.
Get a free SolaX battery storage quote
Tell us about your property and what you are looking to achieve. We will review your details and arrange a free site survey at a time that suits you.
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01798 263333