myenergi Zappi GLO vs Zaptec Go 2

> V2G boundary: A “V2G-ready” label or ISO 15118 support does not by itself provide bidirectional power conversion, export approval or a live energy service. Confirm the compatible car, genuinely bidirectional hardware, certified complete system, installer, service and network approval before assigning value to the claim. Read the UK V2G explainer.

The present versus a promissory note

These two chargers sit £39 apart — £599 for the myenergi Zappi GLO, £638 for the Zaptec Go 2 — and share almost nothing in philosophy. The Zappi GLO is a solar-diversion charger that happens to do smart charging. The Go 2 is a V2G-ready socket that happens to charge a car. One rewards hardware you already own. The other rewards hardware the industry hasn't finished building yet.

• myenergi Zappi GLO — £599. Solar diverting in three modes, tethered with a 6.5 m cable, ecosystem ties to eddi and libbi. Earns its keep the day panels go live.
• Zaptec Go 2 — £638. An AC charger marketed as V2G-ready because it publishes ISO 15118 communication support. MID-approved meter, subscription-free 4G, 5-year warranty. Earns its keep — eventually.

Where the Zappi GLO's £599 goes

Eco+ mode is the entire argument. It holds the car at zero draw until surplus solar exceeds a threshold, then feeds only free energy to the battery. On a typical 4 kWp array, that can mean 1,500–2,000 miles a year charged from the roof at 0p/kWh. No other charger in the catalogue does this natively — not the Go 2, not the Ohme Home Pro, not the Hypervolt Home 3 Pro. The Zappi GLO also slots into myenergi's wider ecosystem: pair it with an eddi to divert surplus to hot water, or a libbi home battery for overnight storage. If your house already speaks myenergi, the GLO is the obvious next purchase.

The trade-off is that without solar panels, the GLO is an overqualified timer. Its smart-tariff support works — you can schedule around Octopus Go's 00:30–05:30 window — but it won't chase half-hourly rates on Octopus Agile with the same fluency as the Ohme Home Pro. And on Intelligent Go, the Ohme still negotiates extra off-peak slots that the Zappi cannot access. Solar owners will not care. Everyone else should.

What the Zaptec Go 2's extra £39 buys

V2G readiness and a MID-approved energy meter. The meter is useful now — legally certified readings for workplace reimbursement or landlord billing, no third-party box required. The subscription-free 4G is a quiet convenience: no reliance on your home Wi-Fi, no dead spots on a detached garage wall. And the 5-year warranty is two years longer than the Zappi GLO's, which matters on a product you expect to outlast two cars.

The V2G promise is harder to value. The Go 2 is certified to feed energy back to the grid once vehicle-to-grid services mature in the UK. The word "once" is doing heavy lifting. V2G trials are live but limited; compatible vehicles remain few; the commercial framework — who pays you, how much, through which aggregator — is still forming. You are buying a ticket to a concert whose date has not been confirmed. The Indra Smart PRO at £395 also bills itself as a V2G pioneer, though its approach differs and the comparison between those two is its own conversation.

The Go 2 is also untethered only — no attached cable. That suits shared driveways and multi-car households where different connectors matter, but it means carrying a cable to and from the boot each session. The Zappi GLO's 6.5 m tethered cable is there when you arrive, which on a dark January evening is worth more than any spec sheet suggests.

The tariff question neither charger answers well

Neither the Zappi GLO nor the Go 2 is the strongest smart-tariff charger in the catalogue. Both support scheduled charging and both work on fixed off-peak windows — Octopus Go at 8.5p/kWh, EDF GoElectric at 6.99p/kWh. But for half-hourly rate-chasing on Agile, or for the extra off-peak slots on Intelligent Go, the Ohme Home Pro at £539 is the sharper tool. If tariff automation is the priority and solar is not in the picture, the Ohme is £60 cheaper than the Zappi GLO and £99 cheaper than the Go 2 — and does the tariff job better than either. The Ohme vs Zappi GLO comparison spells that out in detail.

Which to buy

Buy the myenergi Zappi GLO if:

• You have solar panels — or plan to install them within the year
• You want a tethered 6.5 m cable ready on the wall
• You already own myenergi kit (eddi, libbi) and want one app for everything

Buy the Zaptec Go 2 if:

• V2G readiness is a genuine priority, not just a nice idea
• You need a MID-approved meter for billing or reimbursement
• The 5-year warranty and built-in 4G outweigh the lack of a tethered cable

For most households with panels on the roof, the Zappi GLO is the more useful charger today — and £39 cheaper. The Go 2 is a considered bet on a grid that does not yet exist. Bets can pay off. But the sun is already up.