The cost of a solar system with lithium-ion batteries can be broken down into two main components: the solar panels and the battery storage. Let's examine each:

## Solar Panel Costs

The average cost of solar panels in 2024 is approximately $2.85 per watt before incentives[2]. This means a typical 8 kW solar system would cost around $22,800 before any tax credits or rebates.

## Battery Costs

Adding a battery system significantly increases the overall cost:

- A fully installed 12.5 kWh solar battery costs about $13,000 on average, after claiming the 30% federal tax credit[1].

- The cost per kilowatt-hour (kWh) of battery storage ranges from $720 to $1,343, depending on the brand and model[1].

## Combined Solar and Battery System Costs

When installing a solar system with batteries:

- The total cost for an 8 kW solar system with a battery bank is approximately $34,800 before incentives[2].

- After applying the 30% federal tax credit, the net cost drops to about $24,360[2].

It's important to note that these figures are averages, and actual costs can vary based on factors such as:

- Location

- Specific equipment chosen

- Installation complexity

- Additional local incentives

## Cost Breakdown

The NREL provides a breakdown of costs for a typical home solar system with battery storage:

| Component | Percentage of Total Cost |

|-----------|--------------------------|

| Battery system | 21.2% |

| Solar modules | 7.2% |

| Solar inverter | 6.7% |

| Structural components | 6.1% |

| Other electrical components | 7.1% |

| Labor | 4.9% |

| Office work | 24.3% |

| Other costs (overhead, permitting, etc.) | 22.5% |

This breakdown shows that the battery system represents a significant portion of the total cost[2].

## Conclusion

While it's challenging to provide an exact per-watt cost for a combined solar and battery system due to the varying capacity and pricing of batteries, you can expect the overall cost to be significantly higher than a solar-only system. The addition of lithium-ion batteries can increase the total system cost by $12,000 to $20,000 or more, depending on the battery capacity and brand chosen[4].

Citations:

[1] https://www.solar.com/learn/solar-battery-price/

[2] https://www.ecowatch.com/solar/solar-battery-cost

[3] https://shopsolarkits.com/blogs/learning-center/cost-of-off-grid-solar-system

[4] https://www.solarreviews.com/blog/is-solar-battery-storage-worth-it-given-current-solar-battery-cost

[5] https://www.reddit.com/r/solar/comments/15g0vki/if_its_3_per_watt_for_solar_how_much_is_it_for/

[6] https://nrgcleanpower.com/learning-center/how-much-does-a-solar-battery-cost/

[7] https://www.thisoldhouse.com/solar-alternative-energy/reviews/off-grid-solar-system-cost

[8] https://www.forbes.com/home-improvement/solar/cost-of-solar-panels/

Based on the search results, the cost of a solar system with lithium-ion batteries can be broken down as follows:

## Solar Panel Costs

The average cost of solar panels in 2024 is approximately $2.85 per watt before incentives[2]. This means a typical 8 kW solar system would cost around $22,800 before any tax credits or rebates.

## Battery Costs

Adding a lithium-ion battery system significantly increases the overall cost:

- A fully installed 12.5 kWh solar battery costs about $13,000 on average, after claiming the 30% federal tax credit[1].

- The cost per kilowatt-hour (kWh) of battery storage ranges from $720 to $1,343, depending on the brand and model[1].

## Combined Solar and Battery System Costs

When installing a solar system with batteries:

- The total cost for an 8 kW solar system with a battery bank is approximately $34,800 before incentives[2].

- After applying the 30% federal tax credit, the net cost drops to about $24,360[2].

## Cost Breakdown

The National Renewable Energy Laboratory (NREL) provides a breakdown of costs for a typical home solar system with battery storage:

| Component | Percentage of Total Cost |

|-----------|--------------------------|

| Battery system | 21.2% |

| Solar modules | 7.2% |

| Solar inverter | 6.7% |

| Structural components | 6.1% |

| Other electrical components | 7.1% |

| Labor | 4.9% |

| Office work | 24.3% |

| Other costs (overhead, permitting, etc.) | 22.5% |

This breakdown shows that the battery system represents a significant portion of the total cost[2].

While it's challenging to provide an exact per-watt cost for a combined solar and battery system due to the varying capacity and pricing of batteries, you can expect the overall cost to be significantly higher than a solar-only system. The addition of lithium-ion batteries can increase the total system cost by $12,000 to $20,000 or more, depending on the battery capacity and brand chosen[4].

It's important to note that these figures are averages, and actual costs can vary based on factors such as location, specific equipment chosen, installation complexity, and additional local incentives.

Citations:

[1] https://www.solar.com/learn/solar-battery-price/

[2] https://www.ecowatch.com/solar/solar-battery-cost

[3] https://shopsolarkits.com/blogs/learning-center/cost-of-off-grid-solar-system

[4] https://www.solarreviews.com/blog/is-solar-battery-storage-worth-it-given-current-solar-battery-cost

[5] https://www.reddit.com/r/solar/comments/15g0vki/if_its_3_per_watt_for_solar_how_much_is_it_for/

[6] https://nrgcleanpower.com/learning-center/how-much-does-a-solar-battery-cost/

[7] https://shopsolarkits.com/collections/lithium-ion-solar-batteries

[8] https://www.thisoldhouse.com/solar-alternative-energy/reviews/off-grid-solar-system-cost

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