The myenergi ecosystem is a range of four energy management products — Zappi (EV charger), Eddi (hot water diverter), Libbi (home battery), and Harvi (wireless sensor) — that share a single app and communicate through the myenergi Hub. Designed and manufactured in Stallingborough, Lincolnshire, myenergi offers the broadest full-stack ecosystem of any UK-based brand, covering EV charging, solar surplus diversion, hot water heating, and home battery storage in one coordinated system.
For an overview of how this fits into the wider UK home energy landscape, see our full home energy ecosystem guide.
What is the myenergi ecosystem?
The myenergi ecosystem is built around a single principle: use every unit of solar energy you generate before exporting any of it to the grid. Each product in the range has a specific role in that priority chain, and they communicate with each other via the myenergi Hub — a small wall-mounted or DIN-rail unit that connects all devices via 868 MHz radio frequency.
The Hub also provides the Wi-Fi bridge that allows the myenergi app (available on iOS and Android) to monitor and control all devices remotely. From the app, you can set energy priority ordering, check real-time solar generation and grid import, schedule overnight charging sessions, and integrate with compatible smart tariffs.
myenergi was founded in 2016 and manufactures its products in Stallingborough, Lincolnshire — a frequently cited point of difference against brands that design in the UK but manufacture abroad.
Zappi EV charger
Zappi is myenergi’s flagship product and one of the most widely installed smart EV chargers in the UK. It is available in single-phase (7.4 kW) and three-phase (22 kW) versions, in tethered or untethered form, with a Type 2 connector as standard.
The three charging modes are Zappi’s defining feature:
Eco mode: Charges at the grid minimum (1.4 kW) and increases output as solar surplus becomes available. If surplus rises, Zappi charges faster; if it falls, Zappi charges slower, down to 1.4 kW. This mode always charges at some rate even if there is no solar.
Eco+ mode: Charges only from solar surplus. Zappi modulates its output between 1.4 kW and 7.4 kW in real time to match the surplus exactly. If surplus drops below 1.4 kW, charging pauses. This is the most efficient mode for self-consumption.
Fast mode: Charges at maximum available grid power regardless of solar. Used when you need a full charge quickly and cost is secondary to speed.
Zappi is OZEV-compliant for the EV chargepoint grant, and includes built-in O-PEN (Open Protective Earth Neutral) fault protection as standard. It requires a CT clamp (included) to be fitted at the consumer unit to measure grid flow.
For a detailed product breakdown, see our best solar EV chargers comparison.
Eddi hot water diverter
Eddi is the second product in the myenergi priority chain. Once the Zappi has absorbed its share of solar surplus, Eddi diverts any remaining surplus to your immersion heater rather than letting it export to the grid.
A standard domestic immersion heater draws 2 to 3 kW. On a typical summer day with a 4 kWp array, a household that charges the car in the morning and fills the hot water cylinder in the afternoon can cover 60 to 80% of its annual hot water energy from solar, significantly reducing gas or grid electricity use for heating. This saving estimate reflects installer-community data and varies significantly by household.
Key Eddi specifications:
- Supports two immersion heater outputs, configurable as primary and secondary priority
- Compatible with any immersion heater element up to 3.68 kW per output
- Priority ordering between Zappi and Eddi is configurable in the myenergi app
- Works via the myenergi Hub with Harvi or wired CT clamp
Eddi is particularly valuable for households with a hot water tank (rather than a combi boiler), as it turns surplus solar into free domestic hot water with no additional running cost.
Libbi home battery
Libbi is myenergi’s home battery, designed to store solar surplus and cheap off-peak grid electricity for use later in the day or overnight. Unlike most competing batteries, Libbi uses an AC-coupled architecture, meaning it connects to the AC side of your existing electrical system rather than the DC side of your solar panels.
What AC coupling means in practice:
AC coupling allows Libbi to work alongside any existing solar inverter without replacing it. If you already have solar panels and a standard string inverter, you can add Libbi without touching the solar installation. This is a significant advantage for retrofit projects where the solar is already paid for and working.
Libbi specifications:
- Modular capacity: 5 kWh, 10 kWh, 15 kWh, or 20 kWh (one to four 5 kWh modules)
- LFP (lithium iron phosphate) chemistry for long cycle life and thermal stability
- Smart tariff scheduling built into the myenergi app
- Integrates with Zappi and Eddi for coordinated energy priority management
A myenergi V2X roadmap has been signalled in brand communications, suggesting Libbi could work alongside a future bidirectional Zappi — though no live bidirectional hardware had launched as of early 2026. Treat any specific roadmap claims with caution and verify current status before purchasing on this basis.
Harvi and the myenergi Hub
Harvi is a self-powered wireless CT clamp sensor. Standard CT clamps require a wired connection from the sensor at your consumer unit to the Zappi charger. If your consumer unit is in a different part of the building from your charger — a garage install, for example — Harvi removes the need to run a separate CT cable, instead transmitting sensor data wirelessly to the Zappi.
Harvi is self-powered by the electromagnetic field of the cable it clips onto, requiring no mains connection.
The myenergi Hub is the central controller. It links all myenergi devices via 868 MHz RF, provides the Wi-Fi bridge for the app, and enables remote firmware updates across all connected devices. Without the Hub, each myenergi device operates independently without coordinated priority management.
How the ecosystem works together
The myenergi energy priority flow works as follows, configurable in the app:
- Home load is always first. Your lights, appliances, and other consumption are always served before any surplus is calculated.
- Zappi charges the car. Any remaining surplus above the home load is directed to the car, starting at the minimum threshold (1.4 kW in Eco+ mode).
- Eddi heats water. Surplus above Zappi’s current draw goes to the immersion heater.
- Libbi charges. Remaining surplus after Zappi and Eddi charges the battery.
- Export. Only if all priorities are satisfied does energy export to the grid.
This ordered priority ensures that every unit of solar you generate is used as productively as possible before any SEG export payment kicks in. You can reorder priorities in the app — for example, you may prefer to fill the battery before the hot water cylinder on certain days.
Tariff integration
The myenergi ecosystem integrates with several UK smart tariffs:
Octopus Intelligent Flux (native): Intelligent Flux is specifically designed for solar and battery households. It offers a low import rate for charging the battery overnight and a higher export rate for selling solar during peak afternoon periods. myenergi holds a native API partnership with Octopus for this tariff, enabling automatic scheduling.
Octopus Agile: Agile’s half-hourly varying rates can be exploited by scheduling battery charging during cheapest half-hours. This requires manual scheduling in the app or third-party automation (via Home Assistant or community integrations) rather than a native API.
E.ON Next Drive: Compatible via manual scheduling in the myenergi app.
Intelligent Octopus Go is primarily designed for charger-only households. Flux is typically the stronger option for myenergi users with both solar and Libbi battery.
How the myenergi ecosystem compares
| myenergi | GivEnergy | Ohme | Hypervolt | |
|---|---|---|---|---|
| EV charger | Zappi (7.4/22 kW) | 7.4 kW | Home Pro / ePod | Home 3 Pro |
| Hot water diverter | Eddi | No | No | No |
| Battery | Libbi 5–20 kWh | AIO 13.5 kWh | No | No |
| Solar modes | Eco+ / Eco / Fast | Solar Boost | No | Three modes |
| Architecture | AC-coupled | DC-coupled | N/A | N/A |
| UK-made | Yes (Lincolnshire) | Yes (Devon) | UK-designed | UK-designed |
| Native Octopus | Flux | Scheduler only | Intelligent Go | Intelligent Go |
For a full four-way comparison, see myenergi vs GivEnergy vs Ohme vs Hypervolt.
Cost and installation
Typical myenergi ecosystem pricing (RRP, 2026):
- Zappi 7.4 kW: approximately £1,099
- Eddi: approximately £629
- Libbi 10 kWh (two modules): approximately £6,800 to £7,500 installed (including installation; this is an estimated range and will vary by installer)
- myenergi Hub: approximately £99
All myenergi products require installation by a qualified electrician. OZEV approval requires an approved installer for the Zappi. MCS certification is required for the Libbi if you want it to qualify under any battery storage grant or SEG scheme conditions.
The Eddi connects to your existing immersion heater and typically takes two to three hours to install alongside a Zappi.
Get quotes from myenergi-approved installers
A myenergi full ecosystem install requires coordination across electrician, solar, and battery trades. Choosing an installer with myenergi-specific experience makes commissioning and app setup significantly smoother.
Get free quotes from myenergi-approved installers from vetted professionals across the UK. Confirm your installer’s experience with the full myenergi range before booking.
Key Takeaways
- The myenergi ecosystem covers EV charging (Zappi), hot water diversion (Eddi), home battery storage (Libbi), and wireless sensing (Harvi) — all managed through one app via the myenergi Hub.
- Zappi’s Eco+ mode modulates charging between 1.4 and 7.4 kW in real time to match solar surplus exactly, making it one of the most efficient solar EV chargers available.
- Libbi is AC-coupled, meaning it can retrofit to any existing solar installation without replacing the inverter — a major advantage over DC-coupled alternatives.
- Native integration with Octopus Intelligent Flux makes myenergi the strongest ecosystem choice for households with solar who want to optimise both import and export timing.
- myenergi products are designed and manufactured in Lincolnshire, with UK-based support.
Frequently Asked Questions
What is the myenergi ecosystem? The myenergi ecosystem is a family of four energy products — Zappi EV charger, Eddi hot water diverter, Libbi home battery, and Harvi wireless sensor — that share a single myenergi app and communicate through the myenergi Hub. Together they form a coordinated solar-first home energy management system, designed to use every unit of self-generated solar power before importing from the grid or exporting for an SEG payment.
Does Zappi need Eddi or Libbi to work? No. Each myenergi product works as a standalone device. Zappi charges your car independently; Eddi diverts surplus to hot water independently; Libbi stores energy independently. The ecosystem benefits come from running them together through the Hub and app, where the coordinated priority chain maximises self-consumption across all three loads simultaneously.
Can I add Libbi to my existing non-myenergi solar? Yes. Libbi is AC-coupled, which means it connects to the alternating current side of your system — the same side as your home’s socket circuits — rather than the DC output of your solar panels. This makes it compatible with any MCS-certified solar installation, regardless of the inverter brand, without requiring you to change the existing solar hardware.
Which tariff works best with the myenergi ecosystem? Octopus Intelligent Flux is generally the strongest match for households with both solar and a Libbi battery. Flux offers a lower import rate overnight (for charging the battery) and a higher export rate during peak afternoon periods (for selling solar surplus), which aligns well with the myenergi priority chain. Octopus Intelligent Go is better suited to charger-only households focused primarily on overnight EV charging costs.
Is Zappi V2G-ready? No. As of early 2026, Zappi does not support vehicle-to-grid (V2G) or vehicle-to-home (V2H) bidirectional charging. myenergi has discussed a bidirectional roadmap in brand communications, but no live V2G Zappi hardware has launched. If V2G is a priority for your purchasing decision, verify the current product status before buying.
Useful Resources
myenergi product documentation https://myenergi.com/resources
Octopus Intelligent Flux tariff https://octopus.energy/smart/intelligent-octopus-flux
myenergi community forum https://community.myenergi.com
Zappi installation manual https://myenergi.com/app/uploads