The Power of the Powerwall: The secret behind the low bill is the Tesla Powerwall, a large battery that integrates with the home’s power system.

When paired with solar panels, it stores excess energy, which is then used to charge the Tesla.

Although the Powerwall itself is expensive, it can significantly reduce charging costs over time.

Long-Term Savings: While the upfront cost of a Powerwall is high, ranging from $11,500 (£9,000) to $15,000 (£11,800), it could be a worthwhile investment for long-term Tesla owners.