Myenergi Harvi Wireless 3-Phase Sensor | Load Balancing for Zappi & Eddi
Myenergi Harvi Wireless 3-Phase Sensor
Load Balancing for Zappi & Eddi
Product Code: 761856647800
SKU: EU-HARVI-65A3P
Wireless Load Balancing When You Can't Run a Cable
Harvi lets a Myenergi zappi or eddi read your CT clamps without a data cable back to the fuse board. Fit it where the clamps sit and it sends the readings to the charger by radio.
It powers itself from the CT clamps, so you need no batteries and no mains supply. Use it to measure grid import, solar generation or a home battery.
Key Features
- Wireless link to zappi and eddi
- Self-powered no batteries or mains supply
- 3 CT inputs for three-phase measurement
- Grid, solar or battery measurement modes
- Indoor wall mounting
Specifications
| Compatible With | Myenergi zappi, eddi |
| CT Inputs | 3 |
| Power | Self-powered from CT clamps |
| Connection | Wireless (Myenergi radio) |
| Mounting | Indoor wall mount |
| In the Box | Harvi unit (CT clamps not included) |
CT clamps are not included. Use the clamps supplied with your zappi or buy extras separately.
Shipping
Free standard UK delivery on most orders over £100. You'll see delivery options, costs and timescales at checkout before you pay. Some items are made to order or ship direct from the manufacturer, so they take longer. We email your tracking details once your order leaves us.
Returns & Warranty
Buying as a consumer? You can cancel within 14 days of delivery. We refund unused, unopened items in full. If you have opened or used an item, we may reduce the refund to reflect any loss in value. Business orders don't include change-of-mind returns, but we cover faulty or incorrectly supplied products for every customer.
The manufacturer sets the warranty, and the length varies by product. You'll find it in the specifications.
Installation & Compatibility
Will this charger work with my car?
Check the connector type and charging power in the specifications above against your vehicle's handbook. If you're not sure, email info@on-ev.com before ordering.
What does installation involve?
The charger must be installed by a qualified electrician in line with local wiring regulations and the manufacturer's installation instructions. Supply type, circuit rating, cable size and protection depend on this specific product and your property, so your electrician will confirm what's needed.
The specifications on this page apply to this product. If they differ from any general guidance on our website, the product specifications take precedence.
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Estimates based on 7.4kW AC charging with ~95% efficiency. Actual times vary by vehicle onboard charger limit, battery temperature, and state of charge.
Common Questions
Do I need an electrician to install an EV charger?
Yes. A qualified, locally certified electrician should install your charger. ON-EV supplies the unit; we don't arrange installation. Book a certified installer once your charger arrives.
Which countries do you ship to?
We ship to 27 EU countries, including Germany, France, the Netherlands, Ireland, Spain and Italy. Every EU order ships from our partner warehouse in the Netherlands, not the UK, so it clears customs faster and arrives sooner.
Should I buy a tethered or untethered charger?
A tethered charger keeps its cable attached, so you unhook it and plug in. An untethered (socketed) charger has a Type 2 socket, and you use your own cable. Choose tethered for speed each day, or untethered if you run more than one EV or want a tidier wall. Our tethered vs untethered guide covers the trade-offs.
What's the difference between a 7.4kW and a 22kW charger?
A 22kW charger needs a three-phase electricity supply, standard in most EU homes, and charges about three times faster than a 7.4kW single-phase unit. Check your fuse box rating or ask your electrician if you're not sure which supply you have.
Do I need permission to install a home EV charger?
Requirements vary by country and property type across the EU. In most cases a home charger doesn't need special permission, but confirm with your installer or local authority before ordering, especially for apartments or listed buildings.
Can I charge my EV from solar panels?
Yes, with a solar compatible charger. It measures the surplus power your panels produce and sends it into your car instead of exporting it to the grid. Browse our solar EV chargers.
Which EV chargers work with Octopus tariffs?
Many smart chargers work with Octopus tariffs, and some are approved for Intelligent Octopus Go. Check the product specifications for tariff support before you buy.
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“Really happy with the service from start to finish. The team made getting my EV charger installed easy and straightforward. They were professional and kept me updated throughout the whole process, which I appreciated. The installation was done quickly and to a high standard. It's great to deal with a company that's reliable, knowledgeable, and clearly cares about doing a good job. I'd definitely recommend them to anyone looking to get an EV charger installed - excellent service and a genuinely positive experience.”
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