myenergi Zappi GLO vs Cord Zero

The £126 question: solar panels or not?

The myenergi Zappi GLO costs £599. The Cord Zero costs £473. That £126 gap buys one specific thing — surplus-solar diversion sophisticated enough to run your car entirely from your roof. If you have panels, the Zappi GLO earns that premium back in free kilowatt-hours. If you do not, it is £126 spent on a solar computer with nothing to compute.

• myenergi Zappi GLO — the solar specialist. Three diversion modes, ecosystem integration with eddi and libbi, 6.5-metre tethered cable, Wi-Fi only.
• Cord Zero — the connectivity pragmatist. Dual Wi-Fi plus 4G failover, built-in RCD and PEN fault detection, lower install costs, a promotional five-year warranty if it is still running when you order.

Why the Zappi GLO costs what it costs

The Zappi GLO's Eco+ mode is the entire argument. It monitors your solar generation in real time and feeds only the surplus into the car — nothing from the grid. Eco mode blends grid and solar; Fast mode ignores the panels entirely. No other charger at any price does this as well. The myenergi ecosystem extends the logic further: pair it with an eddi to divert surplus to your hot-water tank, or a libbi home battery to store what the car does not need. For a household with 4 kW+ of rooftop solar, the maths tend to be decisive within a year or two.

Strip the solar away and the picture changes. The Zappi GLO's smart-tariff support works — you can schedule around Octopus Go or EDF GoElectric — but it does not negotiate extra off-peak slots the way the Ohme Home Pro does on Intelligent Go. Its Wi-Fi-only connectivity is a vulnerability in garages and outbuildings where the signal thins. And at £599, you are paying more than every mainstream 7 kW charger bar the Hypervolt Home 3 Pro and the design-led Andersen A3. Without panels, the price is hard to justify. Solar buyers should also look at the Zappi GLO vs GivEnergy comparison — the GivEnergy is £155 cheaper and fits neatly into battery-storage setups, though its solar diversion is less refined.

The Cord Zero's real advantage is reliability, not glamour

The Cord Zero will not win any design awards, and its app — Cord AI — is functional rather than elegant. What it does well is stay online and keep install costs down. The dual Wi-Fi plus 4G with automatic failover means it remains connected even when your router restarts at 2 a.m. For tariff-scheduled charging on Octopus Go, British Gas EV Power, or OVO Charge Anytime, that reliability matters more than interface polish.

The built-in RCD, PEN fault detection, surge protection, and overvoltage protection typically save £150–£250 on install labour — components your electrician would otherwise need to source and wire separately. Factor that in and the effective cost gap between the two chargers widens beyond £126. The Cord Zero's standard warranty is three years, matching the Zappi GLO, but a current promotional extension bumps it to five — check whether that offer is still live before ordering.

The trade-off is weather rating. The Cord Zero's IP54 + IK08 is adequate for a sheltered wall or garage but a step below the Zappi GLO's IP65 for a fully exposed installation. If your charger will face driving rain with no overhang, the Zappi GLO is better protected.

Which to buy

Buy the myenergi Zappi GLO if:

• You have solar panels and want surplus-only charging via Eco+
• You already own — or plan to buy — other myenergi hardware (eddi, libbi)
• Your charger will sit on a fully exposed, unsheltered wall (IP65)

Buy the Cord Zero if:

• You do not have solar panels and want straightforward smart-tariff scheduling
• Your garage or driveway has weak Wi-Fi — the built-in 4G removes the worry
• You want the lowest total cost after install, especially with the promotional five-year warranty

For most buyers without solar, the Cord Zero is the more rational purchase. It costs £126 less at the unit, saves a further chunk on install, and its 4G failover solves a problem that trips up chargers costing twice as much. Grant-eligible renters and flat owners can claim the £500 OZEV grant, which covers the Cord Zero's £473 unit price outright and chips into the install.

The Zappi GLO earns its premium only when there are panels on the roof. If that describes your home, it is the best solar charger you can buy — and the £126 will look modest against a year of free midday top-ups.