Intelligent power control

Smart solar controlfor every energy need.

From straightforward daytime solar to battery-ready backup and independent off-grid power, the LEWIS inverter family gives homes and businesses the right level of control. Choose GridMax™ for on-grid generation, PowerSync™ for hybrid solar and storage, or PowerGuard™ for locations with limited, unreliable or unavailable grid access.

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Lewis wall-mounted solar inverters - GridMax, PowerSync and PowerGuard

Range

On-grid · Hybrid · Off-grid

Power options

5 – 20 kW · single & three-phase

Battery systems

Selected TerraVault™ compatibility

Lewis warranty

5 / 7 yrs · 7 with Premium*

*Power rating, phase configuration, battery voltage, compatibility and warranty depend on the selected model and package. Refer to the applicable datasheet and approved battery compatibility list.

Three series

One family.A series for every energy setup.

Intelligent on-grid

GridMax™

At a glance

On-grid solar · no battery required

☀Daytime solar savings – use solar power as it is generated

LEWIS GridMax™ converts energy from your solar panels into usable electricity for your home or business. During daylight hours, it helps you use more of your own solar power, purchase less electricity from the grid and reduce ongoing energy costs.

Efficient, reliable and easy to monitor, GridMax™ is ideal for customers seeking a straightforward, cost-effective solar solution without battery storage.

Important to knowGridMax™ requires an active utility-grid connection and automatically stops supplying power during a grid outage as part of its electrical safety protection. For backup power during outages, choose PowerSync™ with a compatible TerraVault™ or TerraVault Max™ battery.

View datasheet →

Hybrid

PowerSync™

Power range

5 – 20 kW · low- and high-voltage · single- and three-phase options

⌁Solar, battery, grid and backup – intelligently managed together

LEWIS PowerSync™ manages power from your solar panels, battery and utility grid in one intelligent system. It helps reduce grid dependence, store surplus solar energy and maintain backup power during outages. With a compatible TerraVault™ or TerraVault Max™ battery, PowerSync™ can direct surplus daytime solar into storage for use after sunset, during peak-demand periods or when the utility grid is unavailable.

Available in selected low- and high-voltage, single- and three-phase configurations for homes and businesses.

Important to knowBattery voltage, phase, backup capacity and TerraVault™ compatibility depend on the selected model and system design.

View datasheet →

Off-grid

PowerGuard™

Power range

5 – 20 kW · selected low- and high-voltage · single- and three-phase options

⚑Independent solar, battery and generator power

LEWIS PowerGuard™ is designed for homes, farms, clinics and businesses where grid electricity is limited, unreliable or unavailable. It manages solar generation, compatible battery storage and optional generator input to provide dependable, more independent power.

Available in selected single- and three-phase, low- and high-voltage configurations for different property sizes and energy requirements.

Important to knowPower rating, phase configuration, battery voltage, generator support and TerraVault™ compatibility depend on the selected model and system design.

View datasheet →

Why choose a Lewis inverter

The intelligent centreof your solar system.

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⌁

Smart energy control

GridMax™, PowerSync™ and PowerGuard™ convert and manage solar energy according to your selected on-grid, hybrid or off-grid setup.

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TerraVault™ compatibility

Selected PowerSync™ and PowerGuard™ models work with compatible TerraVault™ and TerraVault Max™ batteries. Compatibility depends on battery voltage, BMS communication and system design.

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Connected system monitoring

View solar generation, energy use, battery status and inverter performance through a compatible monitoring platform. Remote access depends on the selected model, communication device and internet connection.

✓

5- or 7-year Lewis warranty

Five years with the Standard package and seven years with Premium, subject to the selected model, product registration and applicable warranty terms.

Which inverter?

Start with one question –what do you need your solar system to do?

Grid reliability, battery storage and backup requirements help determine the right inverter. Choose the setup that best matches how you want to generate, store and use your solar energy.

Reliable grid · no battery required

Choose GridMax™

Use solar electricity as it is generated during the day and reduce the power you purchase from the grid. GridMax™ is the straightforward, cost-effective choice when battery storage and outage backup are not required.

Explore GridMax™ →

Battery storage · backup required

Choose PowerSync™

Combine solar, battery storage and grid power in one intelligent system. Store surplus daytime energy for use after sunset and maintain power for selected essential circuits during grid interruptions.

Explore PowerSync™ →

No grid · highly unreliable grid

Choose PowerGuard™

Use solar and battery storage as the primary energy source for homes, farms, clinics and remote businesses. Optional compatible generator support can provide additional resilience where required.

Explore PowerGuard™ →

Specifications

Three series,side by side.

Compare the main features of GridMax™, PowerSync™ and PowerGuard™. Final technical specifications depend on the selected inverter model and system design.

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Feature	GridMax™Intelligent on-grid	PowerSync™Hybrid	PowerGuard™Off-grid power
System type	On-grid solar inverter	Solar + battery + grid	Solar + battery + optional generator
Power range	According to selected model	5 – 20 kW	5 – 20 kW selected systems
Phase options	Single- or three-phase, according to model	Selected single- and three-phase models	Selected single- and three-phase systems
Battery voltage	Not applicable	Low-voltage and high-voltage options	Low-voltage and high-voltage options, according to model
Battery compatibility	No battery required	Selected TerraVault™ and TerraVault Max™ systems	Selected TerraVault™ and TerraVault Max™ systems
Monitoring	Connected monitoring on selected models	Connected app and system monitoring	Connected monitoring on selected models
Power during grid outage	No – automatically shuts down for electrical safety	Backup for selected or configured loads, subject to system design	Designed to operate independently of the utility grid
Generator integration	Not normally required	Available on selected models	Available on selected models
Lewis warranty	5 years standard · 7 years with Premium*	5 years standard · 7 years with Premium*	5 years standard · 7 years with Premium*

* Power rating, phase configuration, battery voltage, monitoring, generator integration, battery compatibility and warranty depend on the selected model, package and final system design. Refer to the applicable datasheet and approved battery compatibility list.

Downloads

Technical documents,ready when you are.

Download available specifications, dimensions and compatibility information for each LEWIS inverter range.

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GridMax™ Datasheet

Intelligent on-grid inverter · single- and three-phase · no battery required · PDF

464 KB Download →

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PowerSync™ Datasheet

Intelligent hybrid inverter · 5–20 kW · low- and high-voltage · single- and three-phase · PDF

943 KB Download →

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PowerGuard™ Datasheet

Independent off-grid power · 5–20 kW · optional generator support · PDF

881 KB Download →

The right inverter, sized for your energy needs.

Book a complimentary, no-pressure solar assessment. We'll review your electricity usage, grid reliability, phase requirements, battery needs and backup priorities, then recommend the right GridMax™, PowerSync™ or PowerGuard™ system for your property.

Get a free solar assessment Compare inverter ranges

Solar solutions for Ethiopia · Backed by Lewis Green Energy UK Ltd

[email protected]

Smart solar controlfor every energy need.

One family.A series for every energy setup.

GridMax™

PowerSync™

PowerGuard™

The intelligent centreof your solar system.

Smart energy control

TerraVault™ compatibility

Connected system monitoring

5- or 7-year Lewis warranty

Start with one question –what do you need your solar system to do?

Choose GridMax™

Choose PowerSync™

Choose PowerGuard™

Three series,side by side.

Technical documents,ready when you are.

GridMax™ Datasheet

PowerSync™ Datasheet

PowerGuard™ Datasheet

Completeyour solar system.

Solar Panels

Battery Storage

One complete package. Total peace of mind.

The right inverter, sized for your energy needs.