BYD vs Tesla Charging Cost: Real-World Running Cost Breakdown for EV Owners
Charging a BYD costs roughly A$4.50 to A$6.00 per 100 km at home on off-peak rates, while a Tesla costs approximately A$3.80 to A$5.50 per 100 km due to slightly better energy efficiency. On public DC fast chargers, BYD models cost around A$10 to A$14 per 100 km, while Tesla on Superchargers costs A$8 to A$12 per 100 km. Over 15,000 km per year charging at home, both brands cost between A$570 and A$900 annually, which is roughly one-third the fuel cost of a comparable petrol car.
How EV Charging Costs Are Calculated?
The formula is simple: Energy consumption (kWh/100 km) x Electricity rate (A$/kWh) = Cost per 100 km. Lower consumption means lower cost. Cheaper electricity rates mean lower cost. Both variables matter equally.
Australian electricity rates used in this comparison:
- Home off-peak: A$0.15-A$0.20 per kWh (overnight, time-of-use tariff)
- Home standard rate: A$0.28-A$0.35 per kWh
- Public AC charger: A$0.35-A$0.55 per kWh
- DC fast charger (public): A$0.55-A$0.79 per kWh
- Tesla Supercharger: A$0.55-A$0.68 per kWh (members get lower rates)
Home Charging: BYD vs Tesla at Off-Peak Rates?
| Measurement | Consumption | Cost/100 km (Off-Peak A$0.18) | Cost/100 km (Standard A$0.30) |
|---|---|---|---|
| BYD Atto 3 (Extended) | ~17 kWh/100 km | A$3.06 | A$5.10 |
| BYD Seal (Dynamic RWD) | ~16 kWh/100 km | A$2.88 | A$4.80 |
| BYD Seal (Performance AWD) | ~18.5 kWh/100 km | A$3.33 | A$5.55 |
| BYD Sealion 7 (Premium RWD) | ~19.9 kWh/100 km | A$3.58 | A$5.97 |
| Tesla Model 3 (RWD) | ~14.5 kWh/100 km | A$2.61 | A$4.35 |
| Tesla Model 3 (LR RWD) | ~12.5 kWh/100 km | A$2.25 | A$3.75 |
| Tesla Model Y (Premium RWD) | ~16 kWh/100 km | A$2.88 | A$4.80 |
| Tesla Model Y (LR AWD) | ~15.5 kWh/100 km | A$2.79 | A$4.65 |
Tesla's NMC battery chemistry delivers slightly better energy efficiency (fewer kWh per km), which translates to marginally lower home charging costs. BYD's LFP Blade Battery trades a small efficiency gap for superior cycle life and safer chemistry. For full charging setup details, BYD Seal home charging Mode 2 guide.
Public AC Charging Cost
Public AC chargers (typically 7-22 kW) are found at shopping centres, hotels, and workplaces. At an average rate of A$0.45/kWh:
- BYD Atto 3: ~A$7.65 per 100 km
- BYD Seal RWD: ~A$7.20 per 100 km
- BYD Sealion 7: ~A$8.96 per 100 km
- Tesla Model 3 RWD: ~A$6.53 per 100 km
- Tesla Model Y RWD: ~A$7.20 per 100 km
The efficiency gap widens slightly at public rates because you are paying more per kWh, so every extra kWh of consumption costs proportionally more.
DC Fast Charging: Price per Session
| Measurement | 10-80% Cost (A$0.65/kWh) | Range Added | Cost per 100 km |
|---|---|---|---|
| BYD Atto 3 (60.48 kWh) | ~A$27.50 | ~260 km | ~A$10.58 |
| BYD Seal Performance (82.56 kWh) | ~A$37.56 | ~350 km | ~A$10.73 |
| BYD Sealion 7 Premium (82.56 kWh) | ~A$37.56 | ~310 km | ~A$12.12 |
| Tesla Model 3 RWD (60 kWh) | ~A$27.30 | ~310 km | ~A$8.81 |
| Tesla Model Y LR (85 kWh) | ~A$38.68 | ~400 km | ~A$9.67 |
Tesla's higher efficiency means more range per dollar spent at DC chargers. Supercharger members also access lower per-kWh rates, widening the gap further. For BYD Sealion 7 charging speeds and tips, Sealion 7 complete charging guide.
Cost per 100 km: BYD Seal vs Tesla Model 3
| Measurement | BYD Seal (Dynamic) | Tesla Model 3 (RWD) |
|---|---|---|
| Home off-peak | A$2.88 | A$2.61 |
| Home standard | A$4.80 | A$4.35 |
| Public AC | A$7.20 | A$6.53 |
| DC fast charging | A$10.40 | A$9.43 |
| Difference per 100 km | Tesla saves A$0.27-A$0.97 depending on charging method | |
The Model 3 is cheaper to charge per km, but the Seal is A$8,000 cheaper to buy. At 15,000 km/year charging at home off-peak, the Tesla saves roughly A$40 per year on electricity. That A$8,000 purchase price gap takes over 200 years to recover through charging savings alone.
Cost per 100 km: BYD Sealion 7 vs Tesla Model Y
| Measurement | Sealion 7 Premium | Model Y Premium |
|---|---|---|
| Home off-peak | A$3.58 | A$2.88 |
| Home standard | A$5.97 | A$4.80 |
| DC fast charging | A$12.12 | A$10.40 |
| Difference per 100 km | Tesla saves A$0.70-A$1.72 depending on method | |
The Model Y's efficiency advantage is larger in the SUV segment. However, the Sealion 7 starts A$3,910 cheaper and includes HUD, Dynaudio, and massage seats as standard.
Annual Charging Bill: 15,000 km Scenario
| Measurement | Home Off-Peak | Mixed (80% Home, 20% DC) |
|---|---|---|
| BYD Atto 3 | A$459 | A$618 |
| BYD Seal RWD | A$432 | A$582 |
| BYD Sealion 7 | A$537 | A$793 |
| Tesla Model 3 RWD | A$392 | A$530 |
| Tesla Model Y RWD | A$432 | A$582 |
| Equivalent petrol sedan | A$2,250-A$3,000 per year at A$1.80/L | |
Every BYD and Tesla model costs roughly one-third to one-quarter of a comparable petrol car's annual fuel bill. The difference between BYD and Tesla annual charging costs is A$40-A$105 per year at home, which is negligible compared to the purchase price gap. For Atto 3 specific charging details, Atto 3 charger type guide.
How LFP Battery Efficiency Affects Cost?
BYD's LFP Blade Battery has slightly lower energy density than Tesla's NMC cells, meaning BYD models carry more battery weight per kWh of usable energy. This translates to 1-3 kWh/100 km higher consumption in most comparisons.
The trade-off: LFP batteries tolerate daily 100% charging without accelerated degradation, last 3,000+ charge cycles, and carry near-zero thermal runaway risk. Tesla's NMC packs are more efficient but prefer an 80-90% daily limit for longevity.
Tips to Reduce Charging Costs
- Switch to a time-of-use tariff. Off-peak rates (A$0.15-A$0.20/kWh) are half the standard rate. Charge overnight.
- Install solar panels. Daytime solar charging can reduce your per-kWh cost to near zero.
- Use regenerative braking in High mode. Recovers 12-18% of energy in city driving.
- Keep tire pressures correct. Underinflation increases rolling resistance and energy consumption.
- Minimise DC fast charging. Public DC rates are 3-4x more expensive than home rates. Use DC for road trips only.
- Pre-condition while plugged in. Running A/C before departure while connected draws from the grid, not the battery.
Common Mistakes EV Owners Make
- Comparing charging cost without comparing purchase price. A$40/year in charging savings means nothing against an A$8,000 purchase gap.
- Using DC fast charging daily. At A$0.65/kWh, daily DC charging costs 3-4x more than home off-peak. Reserve it for road trips.
- Ignoring time-of-use tariffs. Switching your electricity plan can halve your home charging cost overnight.
- Thinking EV charging is expensive. Even at the most expensive public DC rate, an EV costs roughly half what petrol costs per km.
- Not factoring in servicing. BYD offers 10-year capped-price servicing. Tesla has no fixed schedule. Both are cheaper than petrol car maintenance.