7kW Single-Phase vs 11kW Three-Phase Home Wallbox + Solar Divert Setup for BYD EVs
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After 20,000 km 6-Month Report of home charging with a solar-aware smart wallbox (Zappi / Evnex / Fronius Wattpilot), here is the real-world cost and efficiency breakdown for BYD owners.
Setup & Surplus Solar Capture:
- Solar Divert Mode (1.4 kW – 7.2 kW dynamic modulation): The BYD onboard AC charger smoothly tracks surplus rooftop solar down to 6A (1.4 kW) without tripping contactors.
- Off-Peak EV Tariff (Midnight – 6:00 AM): Using the wallbox schedule rather than the in-car schedule avoids any handshake sleep timeout on older EVSE firmware.
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After 20,000 km 6-Month Report of home charging with a solar-aware smart wallbox (Zappi / Evnex / Fronius Wattpilot), here is the real-world cost and efficiency breakdown for BYD owners.
Setup & Surplus Solar Capture:
- Solar Divert Mode (1.4 kW – 7.2 kW dynamic modulation): The BYD onboard AC charger smoothly tracks surplus rooftop solar down to 6A (1.4 kW) without tripping contactors.
- Off-Peak EV Tariff (Midnight – 6:00 AM): Using the wallbox schedule rather than the in-car schedule avoids any handshake sleep timeout on older EVSE firmware.
@WillowFraser Setting the schedule in the wallbox app rather than the DiLink screen is the golden rule—works 100% of the time with OCPP smart tariffs.
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