Calcule se 3,45 kW ou 4,6 kW à noite chegam para carregar o seu BYD Atto 3 e se precisa de balanceador dinâmico.
Configure your contracted capacity on your utility bill (time-of-use tariff).
Set your daily driving distance and target charging rate.
Toggle appliances that may run simultaneously while the car is charging.
Base baseline consumption (fridge standby, routers, home automation)
Unavoidable continuous background draw (~250 W). Always on.
Air conditioning / Night heat pump
Modulating inverter compressor in maintenance mode (~600 W).
Electric water heater (boiler)
Continuous resistive heating (~1,800 W). Pro-tip: schedule outside car charging.
Delayed washing machine
Thermal peak while heating water (~2,000 W for 20-30 min).
Delayed night dishwasher
Initial water heating stage (~1,900 W).
Air-to-water heat pump (heating/DHW)
Continuous winter heating load (~1,500 W).
Cooktop / Induction hob
2 burners simultaneously (~2,500 W, relevant if daytime charging).
Electric oven
Continuous baking (~2,200 W, relevant if daytime charging).
Slightly above contracted capacity (up to 115%), but smart meters tolerate this for over an hour without cutting off. It won't trip at night.
Para tus 45 km diarios, el Atto 3 solo necesita recargar 2,2 horas durante la noche. Con 3,45 kW o 4,6 kW contratados y cargando a 16A (3,7 kW), cubrirás el 100% de tus desplazamientos diarios sin necesidad de pagar 5,75 kW o 7,36 kW en la factura.
Debunking the myth: digital meters DO NOT trip instantaneously the second power exceeds 100%.
Digital meters tolerate a 5% excess indefinitely without ever cutting power.
With 3.45 kW contracted, running 3.96 kW (e.g. Atto 3 at 16A + fridge) lasts over 1 full hour. Transient spikes won't cause a blackout.
If multiple continuous heating loads run simultaneously, the thermal curve triggers in 20-30 minutes.
Severe overload. The meter protects building wiring from overheating.
En la factura de la luz, el término de potencia es un coste fijo e ineludible que pagas todos los meses independientemente de la energía que consumas.
| Potência | Ponta (P1) | Vazio (P2) | Total / ano | Diferença |
|---|---|---|---|---|
| 3,45 kW | 113,85 € | 5,18 € | 119,03 € | Base |
| 4,60 kW | 151,80 € | 6,90 € | 158,70 € | +39,67 € |
| 5,75 kW | 189,75 € | 8,63 € | 198,38 € | +79,35 € |
| 7,36 kW | 242,88 € | 11,04 € | 253,92 € | +134,89 € |
| 3,45 / 7,36 kW Otimizada | 113,85 € | 11,04 € | 124,89 € | +5,86 € |
Upgrading grid capacity from 3.45 kW to 7.36 kW incurs mandatory regulated utility fees:
A smart EVSE with dynamic power clamp adjusts Atto 3 charging current in real-time to never exceed contracted capacity.
Tariff regulations allow booking higher capacity in Off-peak (P2) than Peak (P1). Adding 3.9 kW in Off-peak to charge at 7.4 kW costs merely ~€6/year, compared to over €135/year in Peak.
Charging at 16A at night restores 160 km of daily range in 8 hours with minimal thermal losses, without stressing household wiring or requiring expensive daytime capacity upgrades.
No need to access the basement or street meter box. In your home breaker panel, switch off the Main Circuit Breaker (IGA) for 5-10 seconds to reset the smart meter relay, then switch it back on.
Proven wallboxes for BYD Atto 3: V2C Trydan (Modbus/Shelly clamp + solar integration), Wallbox Pulsar Plus / Max (Power Boost), Orbis Viaris Uni, and Morec Smart.