v3.0.0-beta8

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v3.0.0-beta7

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v3.0.0-beta6

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v3.0.0-beta5

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v3.0.0-beta4

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v3.0.0-beta3

How to Calculate the Minimum Charging Price for a Battery Schedule

When scheduling charging for your battery system, it's essential to account for the battery wear cost. The cost, referred to as depreciation per kWh, depends on the purchase price, the expected capacity loss over the battery's lifetime, the number of cycles, and the battery's capacity.

Formula for Depreciation per kWh

To calculate the depreciation cost for each kWh of energy cycled through the battery, use the following formula:

Depreciation per kWh = (Purchase Price * Capacity Loss) / (Number of Cycles * Capacity)

Example Calculation

Assume the following parameters:

• Purchase Price: 48,000 DKK
• Capacity Loss (Degeneration): 30% (0.30)
• Number of Cycles: 6,000
• Capacity: 10 kWh

Using the formula:

Depreciation per kWh = (48,000 * 0.30) / (6,000 * 10)
Depreciation per kWh = 14,400 / 60,000
Depreciation per kWh = 0.24 DKK / kWh

Conclusion

For it to be economically viable to charge the battery, the price difference between charging and discharging must exceed 0.24 DKK per kWh. This ensures that the revenue generated from using the battery offsets the cost of its wear.

Full Changelog: v3.0.0-beta2...v3.0.0-beta3

v3.0.0-beta2

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v3.0.0-beta1

What's Changed

Full Changelog: v2.2.0...v3.0.0-beta1

v2.2.0

Changes

This change fixes the function that finds the best time to charge the battery. There was an error in the function that did not use the hours correctly if negative net consumption was available, meaning we had surplus power from the solar system to charge the battery.

It contains two new commendations:

• batteries_charge_solar: Now used when the battery will charge from solar power solely

• batteries_charge_grid: Now used when the battery will charge from the grid. This recommendation will also be used if solar power is available but not enough.

• force_batteries_charge: This recommendation has now been removed.

Dashboard / Visualisation

Regarding issue #30, an available Apexchart will now show the recommendations during the day. Look at the Wiki for more information:

https://github.com/woopstar/hsem/wiki/Dashboard

⚒️ Breaking Changes

• #83 fix: update _async_find_best_time_to_charge and recommendations @woopstar

🐛 Bug Fixes

• #83 fix: update _async_find_best_time_to_charge and recommendations @woopstar

What's Changed

Full Changelog: v2.1.1...v2.2.0

v2.1.1

Changes

🐛 Bug Fixes

• #81 fix: ev options flow failure @woopstar

📦 Dependencies

• #80 build(deps): bump homeassistant from 2024.12.3 to 2024.12.4 @dependabot

What's Changed

Full Changelog: v2.1.0...v2.1.1