| Initial Cost of Tesla Powerwall | $7,000 – $8,000 |
| Installation Cost | $1,000 – $2,000 |
| Total Initial Investment | $8,000 – $10,000 |
| Average Daily Electricity Usage | e.g., 30 kWh/day |
| Average Electricity Cost per kWh | e.g., $0.12/kWh |
| Daily Savings from Solar Generation | (Average Daily Usage) * (Solar Generation %) |
| Daily Savings from Off-Peak Charging | (Average Daily Usage) * (Off-Peak Charging %) |
| Daily Savings from Peak Avoidance | (Average Daily Usage) * (Peak Avoidance %) |
| Total Daily Savings | Sum of above daily savings |
| Annual Savings | (Total Daily Savings) * 365 days |
| Payback Period | (Total Initial Investment) / (Annual Savings) |