Zappi EV charger Perth guide: charging your car from solar surplus

The myenergi Zappi is a Type 2 AC EV charger (7.4kW single-phase or 22kW three-phase) with a built-in solar export detector. In ECO and ECO+ modes, it reads the home's export level and ramps EV charging up or down to absorb solar surplus rather than exporting it to the grid. No OCPP, no inverter integration, no app integration required — it works by monitoring CT clamp data at the switchboard.

Why solar-responsive EV charging matters in Perth

Perth's electricity economics make solar self-consumption highly valuable:

| Action | Rate (2026 A1 tariff) | |---|---| | Avoid importing from Synergy | Save 33.26c/kWh | | Export surplus to Synergy (DEBS) | Earn 10c/kWh (Super Off-Peak) / 2c/kWh (Off-Peak) |

The gap between avoided import and export earnings is 23–31c/kWh. EV charging is typically 6–15kWh/day for an average Perth driver (10,000km/year in a ~7km/kWh mid-size EV). Shifting that charging to solar hours saves:

• 10kWh/day × 23c gap (10c DEBS vs 33.26c import) = $0.83/day
• Over 365 days = ~$303/year saved vs charging at import rate

A Zappi that routes even 70% of EV charging through solar surplus at 10c export avoided = approximately $212/year in additional savings vs a standard "always on" charger.

How Zappi ECO and ECO+ modes work

Standard (Boost) mode: charges at full rated speed (7.4kW single-phase) from the grid regardless of solar output. Equivalent to a standard EVSE.

ECO mode: Zappi continuously reads the home's net export level via CT clamp. It allocates grid power to ensure minimum charging speed (typically 1.4kW, the minimum for the EV to accept a charge), then adds solar surplus above that minimum. If solar drops below the minimum charge threshold, Zappi draws from grid to maintain the minimum.

ECO+ mode: Zappi waits for solar surplus to cover the entire charging rate before starting. If there's no surplus, the car doesn't charge. Best for solar maximisation when not time-pressured on charging.

In Perth terms:

• ECO mode: starts charging in the morning as soon as solar output begins, mixes solar and minimal grid
• ECO+: waits until solar generates enough surplus to cover the charge rate (typically 9am-3pm in Perth summer), then charges at full surplus

Zappi specs

| Spec | Zappi 2.1 (single-phase) | Zappi 2.1 (three-phase) | |---|---|---| | Max charge rate | 7.4kW | 22kW | | EV compatibility | Type 2 (Mode 3, SAE J1772) | Type 2 (Mode 3) | | Solar modes | ECO, ECO+, Boost | ECO, ECO+, Boost | | CT clamp integration | Yes (2 × CT for import/export reading) | Yes | | myenergi Hub required | Optional (for scheduling + remote app) | Optional | | Warranty | 3 years | 3 years |

For most Perth homes (single-phase supply), the Zappi 7.4kW single-phase is the appropriate product. Three-phase supply enables the 22kW variant (only useful for vehicles that support high-rate AC charging, and for Perth homes with three-phase solar export headroom).

Perth pricing

Approximate 2026 Perth installed pricing:

| Product | Approximate installed price | |---|---| | Zappi 7.4kW (single-phase) | $1,800–$2,800 installed | | Standard EVSE (7.4kW, no solar mode) | $900–$1,500 installed | | myenergi Hub (for app + scheduling) | $250–$350 additional |

The Zappi premium over a standard EVSE is approximately $600–$1,500 installed. At the Perth electricity economics above, payback on the Zappi premium (savings from solar routing vs standard charger) is approximately 2–5 years for average Perth EV drivers.

Does Zappi work with all solar inverters?

Yes. Zappi reads solar export via a CT clamp at the switchboard, independent of the inverter brand. It doesn't require any integration with Sungrow, Fronius, Enphase, SolarEdge, or any specific monitoring platform. This is its main advantage over OCPP-based solar EV chargers (which need inverter integration or smart meter data).

What Zappi requires:

• A CT clamp installed at your switchboard (included with the Zappi)
• A Type 2 charging socket or cable
• A 3-pin power outlet nearby for the CT clamp data line (or hardwired installation)

How Zappi compares to other solar-aware EV chargers in Perth

| | Zappi 2.1 | Wallbox Pulsar Plus | Ohme Home Pro | |---|---|---|---| | Solar ECO mode | Yes (CT clamp, any inverter) | Yes (via EcoSmart, needs integration) | Yes (smart tariff, TOU-aware) | | Inverter independence | Yes | Partial (some integrations needed) | Not solar-export based | | Perth installed price | $1,800–$2,800 | $1,500–$2,200 | $1,200–$1,800 | | App scheduling | Via myenergi Hub | Yes | Yes | | UK/AU market position | Solar-first | App-first | Smart tariff-focused |

Zappi is the simplest solar-export-response charger — it doesn't require smart meter integration, inverter API access, or app configuration to enter solar ECO mode.

For Perth EV owners with solar, the Zappi's ECO mode provides an estimated $200–$400/year additional savings over a standard EVSE by routing EV charging through solar surplus. Payback on the price premium is typically 2–5 years. It works with any inverter and requires no integration beyond a switchboard CT clamp — making it the lowest-friction option for solar-maximised EV charging in Perth.