myenergi Zappi v2 Review 2026: Best UK Solar Charger

If you have rooftop solar — or you're putting it in this year — the myenergi Zappi v2.1 is the home EV charger to start with. It's the only mainstream UK 7kW unit that ships with the CT clamp needed for true solar diversion in the box, and the only one with confirmed integration for all three of the major UK smart tariffs ([Octopus Intelligent Go](/review/intelligent-octopus-go-review/), OVO Charge Anytime, [EDF GoElectric](/review/edf-goelectric-review/)). The 3-year warranty is the main caveat — both Easee and Ohme ship 5 years as standard. This Zappi v2 review covers the spec, the tariff story, what owners actually flag after install, and who should and shouldn't buy.

The Zappi v2.1 is a single-phase 7.4kW (32A) charger with a tethered (6.5m Type 2 cable) or untethered option, and a separate 22kW three-phase variant for properties with three-phase supply. The case is wall-mounted, IP-rated for outdoor installation, and built around a small LCD display that handles configuration directly on the unit — a design choice that matters more than it sounds, because firmware updates are still applied at the device rather than purely through the app.

The headline change in v2.1 over earlier revisions is that WiFi and Ethernet are built into the unit. The original Zappi required a separate myenergi hub for any smart features; on the current revision the hub is gone, the connectivity sits on the charger itself, and you can hard-wire CAT5/CAT6 if you don't want to rely on home WiFi reaching the driveway. Single-phase units ship with one CT clamp; three-phase ships with three. The CT clamps are what makes solar diversion work — without them, Eco modes don't have any view of household import/export and effectively don't function.

The charger has built-in PEN fault protection and surge protection, both of which matter on the install spreadsheet: chargers without these typically need an external Type-A RCD/PEN device, which third-party reviewers consistently put at £100–£150 of additional install cost. That offsets some of the price gap to cheaper rivals.

The Zappi has three modes selectable on the unit and in the app:

Fast — straightforward full-rate charging at the maximum the supply allows, ignoring any solar surplus signal. This is the mode you use if you're on a flat tariff and just want the car charged as quickly as the 32A circuit allows.

Eco — the charger continuously matches its draw to whatever surplus solar generation is available, but if surplus drops or disappears the charge continues from grid power so the session doesn't pause. Useful when you need a guaranteed top-up but want to capture solar where you can.

Eco+ — solar-only. Charging starts when surplus generation crosses an internal threshold (around 1.4kW), pauses when surplus drops below it, and resumes when the sun returns. This is the mode that gives the Zappi its solar reputation, and the one that owners on suitably-sized PV arrays use to drive the marginal cost of charging close to zero.

The Eco+ threshold is worth flagging because it's a recurring source of confusion. New owners ask why the charger isn't doing anything on a partially cloudy day; the answer is usually that solar surplus is bobbing under and over the threshold, and the in-app eco slider — which biases how aggressively the unit pauses — is not self-explanatory from the UI alone.

The Zappi's strongest commercial argument in 2026 is that it works natively with all three major UK smart tariffs:

Octopus Intelligent Go — Octopus's flagship dynamic tariff. Off-peak rates dropped to roughly 5.49p/kWh from 1 April 2026, and IOG can additionally schedule cheap-rate slots throughout the day when the grid is over-supplied. The Zappi can either be controlled by Octopus's external scheduling (the app reaches the charger over the integration) or run its own boost windows aligned with IOG's standard 23:30–05:30 cheap window.

OVO Charge Anytime — OVO's smart-charging tariff which dropped its trial label and entered general availability in 2024. Charge Anytime delivers a fixed cheap EV rate (currently 7p/kWh) at any time, with OVO managing when the charge actually happens behind the scenes. It requires switching energy supplier to OVO, which is a real commitment if you're happy elsewhere.

EDF GoElectric — EDF's overnight EV tariff, with a longer 7-hour off-peak window than IOG's standard 6-hour Go window. Less aggressive than IOG on price but the longer cheap window suits households that need a full battery overnight on a regular basis.

No other mainstream UK home charger ships with all three. Hypervolt has IOG and OVO; Ohme has IOG and EDF; Easee has IOG. If you genuinely want flexibility in your tariff choice, the Zappi is the only unit that doesn't lock you out of one of the three options.

The whole point of the Zappi for solar households is that the CT clamp ships in the box. Both Hypervolt Home 3 Pro and the Ohme Home Pro can do solar diversion in principle, but Ohme's solar mode is a paid-firmware add-on and requires a separately-sourced CT clamp, while the Hypervolt also needs the CT clamp installed during commissioning. The Zappi's hardware-level solar story is the most complete and the least surprise-laden.

The real-world picture from owners with adequately-sized PV (6.6kW upwards) is that Eco+ does deliver multi-day all-solar charging on suitable arrays. A working setup with a 7kW PV system will typically cover most of a daily commute from the panels alone in summer, with the marginal grid pull only kicking in for unusually long trips or extended overcast spells. Owners with smaller arrays (under 5kW) report that Eco mode makes more sense than Eco+ — the surplus rarely sits above the 1.4kW Eco+ threshold long enough to drive a useful charge.

One install consideration worth surfacing: if your consumer unit is a long cable run from the charger location, the included single-cable CT clamp may not reach. The fix is myenergi's Harvi module — a wireless transmitter that sits next to the consumer unit, reads the CT measurements, and sends them over to the Zappi. Owner discussions consistently mention adding the Harvi as a roughly £180 line item on the install spreadsheet. It works, but it's an extra cost the headline £899 unit price doesn't include.

Three issues come up consistently in owner discussions that are worth knowing before you buy:

Dynamic Load Management surprises. The Zappi's DLM feature monitors total household consumption and reduces the EV charge rate when other heavy loads are active — heat pumps, home battery charging, electric showers. This is a feature, not a fault, but it's not visible in the UI and reads like a bug to new owners who watch their 7.4kW charger throttle to 3kW and assume the charger or the car is broken. The fix is recognising that DLM is doing its job; the diagnostic is to check household import at the same moment the charge rate drops.

Preconditioning and scheduled boost interactions. The Zappi has its own preconditioning logic that can override scheduled boost windows under specific conditions. Owners on Octopus Go schedules occasionally find their car hasn't taken a full overnight charge despite the cheap window being correctly configured; the recurring fix is disabling preconditioning on the Zappi side (separately from the car's own preconditioning setting).

Eco+ slider documentation gaps. The in-app slider that biases how aggressively Eco+ pauses is not well-documented and produces unexpected behaviour — particularly on partly-cloudy days where solar surplus bobs under and over the threshold. Owners who learn the threshold value (~1.4kW) and the slider's effect get useful behaviour out of it; owners who never figure it out spend months annoyed at intermittent charging.

None of these are dealbreakers, but they're the difference between buying with realistic expectations and buying expecting a plug-and-play experience that doesn't quite match how the unit actually behaves in a real home.

Three direct rivals to consider at the £900 hardware price point:

Hypervolt Home 3 Pro (~£690 unit, ~£1,099 fitted via OVO) — top of the Auto Express Driver Power 2024 survey, dual-tariff IOG and OVO, CT clamp also included. The Hypervolt wins on warranty (3 years standard but with stronger Driver Power scores) and on design polish. The Zappi wins on having EDF GoElectric as a third tariff option and on the wider myenergi ecosystem (Eddi, Libbi, Harvi).

Ohme Home Pro (~£600 unit, ~£999 fitted) — cheaper, with a deep native integration into Octopus Intelligent Go that's arguably tighter than the Zappi's. The Ohme wins on price and on IOG-specific feature depth. The Zappi wins on solar (Ohme's solar is a paid add-on with a separately-sourced CT clamp) and on broader tariff coverage.

Easee One (~£599 unit, ~£999 fitted) — Norwegian premium charger with strong load balancing, OCPP support, and a 5-year standard warranty (vs Zappi's 3). Easee has a complicated UK safety story that's worth reading separately before buying. The Zappi wins on solar diversion and tariff breadth.

If you have solar, the choice is mostly Zappi vs Hypervolt and the deciding factor is whether you want the broader tariff list (Zappi) or the better Driver Power score (Hypervolt). If you don't have solar and you're on Octopus IOG, the Ohme Home Pro is the value buy.

Buy if: you have rooftop solar (or you're putting it in this year), or you want the option to switch between Octopus Intelligent Go, OVO Charge Anytime, and EDF GoElectric without locking yourself out of any of the three. The included CT clamp, the credible Eco+ mode, and the three-tariff integration are the story.

Skip if: you have no solar plans and you're committed to Octopus Intelligent Go — an Ohme Home Pro is cheaper and the IOG integration is at least as good. Skip too if a 5-year warranty as standard is non-negotiable for you (that's Easee or Ohme territory), or if you specifically need OCPP 2.0 support today (no current UK home charger ships it; if it becomes the regulatory baseline, Zappi's OCPP 1.6 may need a bridge).