myenergi Zappi GLO vs Sync Energy Wall Charger 2: Solar Premium or Budget Smart?

Solar Specialist vs Budget All-Rounder: Is the Zappi Worth Double the Price?

These two chargers sit at opposite ends of the UK smart charger market, yet they share a surprising amount of common ground. Both offer solar diversion, smart tariff scheduling, RFID access, and IP65 weatherproofing. Both carry three-year warranties and OZEV approval. The difference? The myenergi Zappi GLO costs £599 — significantly more than the Sync Energy Wall Charger 2's £362 asking price. That's a gap of nearly £240 before you've even thought about installation.

So why would anyone pay the premium? The answer largely comes down to solar. If you have panels on your roof (or plan to install them), the Zappi GLO's Eco and Eco+ modes are genuinely best-in-class, and the wider myenergi ecosystem — including the eddi hot water diverter and libbi battery — lets you build a complete home energy management system over time. But if you simply want a reliable, well-connected smart charger that can also handle some solar diversion without breaking the bank, the Sync Energy Wall Charger 2 punches well above its weight.

In a nutshell:

• myenergi Zappi GLO (£599): The UK's gold-standard solar EV charger, with three charging modes and deep integration into the myenergi home energy ecosystem.
• Sync Energy Wall Charger 2 (£362): A feature-packed budget smart charger with solar diversion, dynamic load balancing, and built-in PEN fault protection — all at roughly half the Zappi's price.

Spec Comparison

Solar Diversion: Where the Zappi Earns Its Keep

This is the Zappi GLO's raison d'être. Its three charging modes — Fast, Eco, and Eco+ — give you granular control over how much grid versus solar energy goes into your car. Eco+ is the standout: it charges exclusively from surplus solar generation, meaning you can genuinely fill your Tesla for free on a sunny day. Eco mode blends solar surplus with a minimum grid import to keep charging moving even when clouds roll in. For homes already running solar panels, this is transformative. According to electriccarguide.co.uk, the Zappi scores 9/10 for performance, with its dynamic solar charging singled out as a key strength.

The Sync Energy Wall Charger 2 does offer solar diversion via its SolarCharge feature with a CT clamp, and it deserves credit for including this at its price point. However, it lacks the Zappi's dedicated Eco+ mode and the depth of the myenergi ecosystem. If you have a 4kW solar array and want to squeeze every last watt into your car before it hits the grid, the Zappi remains the more sophisticated tool. But if your solar ambitions are more modest — perhaps you just want to top up opportunistically when the sun's out — the Sync Energy's SolarCharge may be perfectly adequate, and you'll save over £400 doing it.

Smart Tariff Integration

Both chargers support smart tariff scheduling, which is essential if you're on Octopus Intelligent Go (~7p/kWh off-peak), Octopus Go (7.5p/kWh between 00:30 and 04:30), or similar time-of-use tariffs. The Zappi GLO is confirmed as fully compatible with Intelligent Octopus, as noted by autochain.co.uk and myenergi.com, meaning it can receive dynamic scheduling signals to charge during the cheapest half-hour slots.

The Sync Energy Wall Charger 2 uses its TariffSense feature for scheduling, and its OCPP 1.6J compliance means it's future-proofed for third-party energy management platforms. That OCPP support is a genuine differentiator — it opens the door to integration with platforms beyond the manufacturer's own app, which could prove valuable as the UK's smart charging landscape evolves. The Zappi GLO does not list OCPP support, so if platform flexibility matters to you, the Sync Energy has an edge here.

At typical off-peak rates of 7p/kWh, charging a 60kWh Tesla Model 3 battery from empty costs roughly £4.20 — compared to around £17 at a standard 28p/kWh daytime rate. Both chargers unlock these savings; neither has a meaningful advantage over the other for pure grid-based smart tariff charging.

App, Connectivity, and Installation

The Zappi GLO is a screen-free unit — myenergi removed the on-unit LCD display from the older Zappi 2.1 — so all control happens through the myenergi app. The app has improved considerably, though it still isn't quite as polished as some rivals like Ohme's, according to user feedback. Connectivity is limited to Wi-Fi and Bluetooth, with no 4G fallback or Ethernet option, which could be a concern if your charger is mounted far from your router.

The Sync Energy Wall Charger 2 counters with Wi-Fi, Bluetooth, and Ethernet connectivity as standard — that wired Ethernet option is a genuine advantage for reliability, especially in homes where the charger sits in a garage or at the far end of a driveway. That said, some users have reported Wi-Fi reliability issues at range, so the Ethernet port isn't just a nice-to-have; it may be essential. A 4G variant (the GG model) is available if you need cellular backup, though it costs extra.

On installation, the Sync Energy includes built-in PEN fault protection, which eliminates the need for an earth rod — saving both cost and disruption during installation. The Zappi GLO also doesn't require an earth rod according to electriccarguide.co.uk, thanks to its built-in RCD and DC leakage protection. Both chargers are OZEV-approved, and the Sync Energy's more compact dimensions (305 × 201 × 115mm versus the Zappi's 439 × 282 × 130mm) make it easier to tuck away in tight spaces. The Sync Energy also adds IK10 impact resistance to its IP65 rating — a useful bonus if your charger is near a driveway where it might take a knock.

Price and Value

The numbers speak for themselves. At the lower end, a fully installed Sync Energy Wall Charger 2 could cost as little as £602 — or just £252 after the OZEV grant. That's less than the Zappi GLO's unit price alone. Even at the top end, the Sync Energy comes in at under £1,000 installed, while the Zappi can push past £1,300.

The Zappi's premium is justified if you have solar panels and want the most sophisticated diversion system on the market, plus the option to expand into the myenergi ecosystem with eddi and libbi. If you don't have solar, you're paying over £400 extra for features you won't use. The Sync Energy, backed by UK-listed company Luceco PLC as noted in its product data, offers remarkable value with solar diversion, OCPP compliance, and dynamic load balancing included at a fraction of the cost.

Who Should Buy Which?

Buy the myenergi Zappi GLO if:

• You have solar panels and want the best solar-to-EV charging system available in the UK
• You're building (or plan to build) a myenergi ecosystem with eddi or libbi
• You need three-phase 22kW charging capability
• You want RFID access for up to 126 users on a shared driveway or small business
• You're on Intelligent Octopus Go and want confirmed direct integration

Buy the Sync Energy Wall Charger 2 if:

• You want a smart charger with solar diversion at roughly half the price
• You value Ethernet connectivity for reliable, wired smart features
• OCPP 1.6J compliance and future platform flexibility matter to you
• You want a compact, impact-resistant unit (IK10 rated) with interchangeable colour fascia plates
• You're on a tight budget but still want genuine smart charging features, not just a dumb wallbox

Our recommendation: For the majority of UK Tesla owners without solar panels, the Sync Energy Wall Charger 2 is the smarter buy. It delivers smart tariff scheduling, solar readiness, and solid connectivity at a price that's hard to argue with — especially with Ethernet as standard and OCPP future-proofing. However, if you have solar panels or are planning a full home energy system, the myenergi Zappi GLO remains the undisputed champion. Its Eco+ mode and ecosystem integration are genuinely unmatched, and for solar households, the premium will pay for itself over time through maximised self-consumption. The question isn't really which charger is better — it's whether your setup justifies the Zappi's price tag.

For the full specs-level breakdown, see our myenergi Zappi GLO vs Sync Energy Wall Charger 2 comparison page.

Read our full myenergi Zappi GLO review or Sync Energy Wall Charger 2 review.

If you have solar panels, see our best EV charger for solar panels guide.

For total installed cost rankings, see our cheapest EV charger guide.

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