myenergi Harvi – Wireless Energy-Harvesting Sensor for zappi & eddi

myenergi Harvi – Wireless Energy-Harvesting Sensor for Smarter Home Energy Management

The myenergi Harvi is an innovative, battery-free wireless energy sensor designed to work seamlessly with the myenergi zappi EV charger and myenergi eddi solar diverter. By measuring the flow of electricity between your property, the grid, and any on-site generation (such as solar panels), it enables your myenergi devices to make smarter decisions, automatically prioritising renewable energy use and reducing grid reliance.

Unlike traditional monitoring devices, the Harvi requires no external power or batteries. Instead, it cleverly harvests the tiny amount of electrical energy needed to operate from the CT clamps connected to your system. This allows for fast, tidy, and cost-effective installation without running additional cables, making it ideal for retrofit or new builds.

Compact, discreet, and accurate, the Harvi delivers reliable real-time data to your myenergi ecosystem, helping you cut energy bills, maximise self-consumption, and gain full visibility over your energy flow, all without compromising on style or convenience.

Charge Smarter, Save More

Pairing Harvi with your zappi smart EV charger or eddi solar diverter unlocks precise, real-time insight into import, export, and on-site generation. That accuracy enables your myenergi system to schedule and modulate charging intelligently, prioritising free solar where available and reducing costly grid import.

• Octopus Intelligent Go ready: Feed your myenergi ecosystem cleaner data so time-of-use schedules and boosts align with cheaper off-peak windows.
• Maximise self-consumption: zappi/eddi react to surplus PV in real time, diverting energy to your car or hot water instead of exporting it.
• Smarter app control: With accurate CT data, the myenergi app gives clearer dashboards, usage history and better automation decisions.
• Lower running costs: By shifting load to off-peak and solar, households typically cut charging and hot-water energy spend without compromise.

If you’re planning panels, see our solar panels range and build a full, solar-aware system from day one.

Design, Build & Convenience

The myenergi Harvi is built for simplicity and reliability. Its compact, unobtrusive housing can be mounted neatly indoors, and because it operates entirely wirelessly, it eliminates the need for unsightly cabling runs. A 30 m indoor wireless range ensures flexibility in placement, whether close to your meter or in a more convenient location for installation.

• Tether-free setup: No mains connection or battery replacement, Harvi powers itself from the CT clamp signal.
• Supports up to 3 CT inputs: Perfect for single-phase and three-phase properties, as well as monitoring multiple circuits.
• Discreet appearance: Neutral white casing blends into most interiors.
• Flexible install: Can be retrofitted without rewiring or added to new builds for a cleaner look.

All data from Harvi is fed directly into your zappi or eddi and displayed in the myenergi app, giving you live visibility and control at home or on the go.

Safety & UK Compliance

The myenergi Harvi is engineered to meet the latest UK Smart Charging Regulations and electrical safety standards, ensuring full compliance when integrated into your renewable energy system. Its wireless energy-harvesting design not only reduces installation complexity but also minimises potential safety hazards associated with additional wiring or external power supplies.

• Certified safety: Manufactured to rigorous myenergi quality standards, meeting UK and EU compliance requirements.
• Wireless reliability: Eliminates the risk of cable damage and reduces exposure to live electrical work during installation.
• Weather-protected placement: Designed for indoor mounting or outdoor use within a suitable IP-rated enclosure.
• Seamless integration: Works safely alongside PEN fault protection, RCDs, and load balancing provided by myenergi devices.

When installed as part of an EV charging or solar storage setup, Harvi ensures accurate energy monitoring without compromising system safety or regulatory compliance.

Why Evergy Recommends This Product

At Evergy, we choose products based on proven performance, installer feedback, and long-term reliability. The myenergi Harvi is a standout accessory for anyone running a zappi or eddi because it delivers precision monitoring without the hassle of complex wiring.

• Trusted by our installer network for easy integration into new and retrofit projects.
• Removes the need for disruptive cable runs, saving time and installation costs.
• Proven reliability in British homes, even with complex solar and storage setups.
• Backed by myenergi’s excellent UK-based technical support and a 3-year warranty.
• Enables your myenergi system to make smarter, greener energy decisions.

We’ve supplied and supported Harvi across hundreds of domestic and commercial projects, and it remains one of our most recommended monitoring solutions for smart energy management.

Ideal For

• Homeowners with solar PV: Maximise self-consumption by ensuring zappi or eddi responds instantly to surplus generation.
• EV owners on smart tariffs: Provide your charger with accurate import/export data for cost-optimised charging schedules.
• Properties without easy cabling routes: Avoid disruptive wiring thanks to Harvi’s fully wireless operation.
• Three-phase installations: Monitor multiple phases with up to three CT inputs for complete oversight.
• Retrofit energy upgrades: Add precision monitoring to existing systems without rewiring or power supply changes.
• Installers seeking efficiency: Reduce on-site labour and simplify compliance with UK smart charging rules.

Whether it’s part of a full solar PV system or a targeted EV charging upgrade, Harvi adapts seamlessly to your setup and energy goals.

Technical Specification Highlights

• Power supply: Self-powered via connected CT clamps – no batteries or mains required.
• CT inputs: Supports up to 3 inputs for single or three-phase systems.
• Measurement range: 25 W to 15 kW (accuracy approx. ±2%).
• Wireless range: Up to 30 m indoors (range may vary with building materials).
• Operating temperature: –20 °C to +40 °C.
• Mounting: Indoor use (or within suitable IP-rated enclosure for outdoor placement).
• Dimensions: Approx. 85 mm x 85 mm x 25 mm.
• Warranty: 3 years, backed by myenergi UK support.

For detailed compatibility, see our myenergi product range and contact us for tailored advice on integrating Harvi into your setup.

Delivery & Installation

At Evergy, we make it simple to get your myenergi Harvi where you need it, when you need it. Thanks to our partnership with LAMPS, you can benefit from rapid delivery options:

• LAMPS IN 2: Two-hour delivery available within London from our Shepherd’s Bush branch.
• Next-day delivery: Available nationwide for in-stock items.
• Branch collection: Pick up from any LAMPS location at your convenience.

For installation, we work with our trusted partner Evie Energy to offer professional fitting services across most of the South East and Midlands. Their qualified electricians can integrate Harvi seamlessly into your zappi or eddi setup, whether as part of a new system or a retrofit upgrade.

Not sure if you need Harvi for your installation? Speak to our team via the contact page for expert advice.

Frequently Asked Questions

Do I need a Harvi to use my zappi or eddi?

Not always. If your CT clamps can be hard-wired to your zappi or eddi, Harvi isn’t required. However, in many installs where wiring is difficult, Harvi is the easiest and tidiest solution.

Does Harvi need batteries or mains power?

No, Harvi is completely self-powered, harvesting the tiny amount of energy it needs from the CT clamp connection itself.

How far can Harvi transmit data wirelessly?

Up to 30 metres indoors, depending on wall construction and building materials. For outdoor use, it must be placed in an IP-rated enclosure.

Is Harvi compatible with three-phase systems?

Yes. Harvi supports up to three CT inputs, making it ideal for both single-phase and three-phase properties.

Can Harvi help me save on energy costs?

Yes. By providing accurate real-time data to your myenergi system, Harvi enables smarter scheduling to maximise solar usage and align with off-peak tariffs.

Does Harvi comply with UK Smart Charging Regulations?

Yes. When integrated with zappi or eddi, Harvi meets the latest UK smart energy compliance requirements.

Can I retrofit Harvi to an existing system?

Absolutely. Harvi is perfect for retrofitting, avoiding the need for new cable runs while still providing accurate monitoring.

Order the myenergi Harvi Today

The myenergi Harvi is the simplest way to give your zappi EV charger or eddi solar diverter the data it needs for smarter, more cost-effective energy use. With wireless installation, no need for batteries or mains power, and full compatibility with single or three-phase systems, it’s an upgrade that delivers immediate benefits.

Backed by a 3-year warranty and Evergy’s expert support, Harvi is trusted by homeowners, installers, and businesses across the UK. Order online today for rapid delivery, or get in touch with our team to discuss the best setup for your property.

Arrange installation through our trusted partners or collect from your nearest LAMPS branch with same-day availability.