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Added diagram for available charging power calculation #472

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TheNinth7 Nov 13, 2023
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Updated description of enable/disable, with more details how the thre…
…sholds are applied, especially in combination with battery and aux devices.
  • Loading branch information
TheNinth7 authored Nov 20, 2023
commit 8cd75d6c80677cc28d58285b2301945c8d159ab4
Original file line number Diff line number Diff line change
Expand Up @@ -205,7 +205,7 @@ estimate: false # No interpolation

### `enable`

Defines the behaviour of starting charging in PV mode. Additionally, it defines the behaviour during automatic phase switching from 1p to 3p.
Defines the behaviour of starting charging in PV mode. Additionally, the delay defined for `enable` is also used for automatic phase switching from 1-phase to 3-phase.

**For example**:

Expand All @@ -217,11 +217,11 @@ enable:

#### `threshold`

Defines the power threshold for starting charging in watts (W). Charging is started once the available charging power exceeds this threshold. Available charging power is calculated based on power readings from the grid connection point, aux devices and battery power, depending on your battery settings. Check the [Manipulations Options](index.md#manipulation-options) section for more information on how these inputs and configuration parameters work together.
Defines the power threshold for starting charging in watts (W). Charging is started once the available charging power exceeds this threshold. Available charging power is calculated based on power readings from the grid connection point, aux devices and battery power, depending on your battery settings. Check the [Manipulations Options](index.md#manipulation-options) section for more information on how these inputs and configuration parameters work together. The default threshold is the minimum charging power. Setting a lower value will start charging even if not enough surplus is available and draw the additionally needed power from grid or if available a battery.

**Possible values**: A positive value for grid consumption, a negative value for grid export. When set to `0`, export must reach the minimum charging power.

**Default value:** `0`
**Default value:** `0` (the system will use minimum charging power)

**For example**:

Expand All @@ -232,14 +232,12 @@ threshold: 0
:::info
If a residual power offset for the desired operating point of the surplus regulation is defined for the evcc site using the `residualPower` parameter, this value must be considered when setting the `threshold` value.

For example, if `residualPower` is set to 200 (the evcc control sets the desired operating point to 200W feed-in), then setting an `enable` `threshold` value of 100 doesn't mean that charging will start at 100W grid consumption. Instead, the remaining feed-in power will be reduced by 100W, starting the charging at 100W feed-in.

To start charging at 100W grid consumption in this case, the `threshold` value should be set to 300.
The `residualPower` is included in the [calculation of available charging power](index.md#manipulation-options) and a positive value for `residualPower` will reduce the available charging power. So for example, if `residualPower` is set to 200 (the evcc control sets the desired operating point to 200W feed-in) and 2,000W surplus is available, the available charging power is only 1,800kW. The remaining 200W will remain available for grid or battery feed-in. In other words, when `residualPower` is 200W and the `enable:threshold` is set to -1,800W, then charging will be started when 2,000W surplus is available.
:::

#### `delay`

Defines how long the `threshold` must be met.
Defines how long the available charging power must exceed the `threshold` before charging is started. Also defines how long sufficient power for 3-phase charging must be available, before the system automatically switches from 1-phase to 3-phase.

**Default value:** `1m`

Expand All @@ -253,7 +251,7 @@ delay: 1m

### `disable`

Defines the behaviour of stopping charging in PV mode. Additionally, it defines the behaviour during automatic phase switching from 3p to 1p.
Defines the behaviour of stopping charging in PV mode. Additionally, the delay defined for `disable` is also used for automatic phase switching from 3-phase to 1-phase.

**For example**:

Expand All @@ -265,11 +263,11 @@ disable:

#### `threshold`

Defines the power threshold at the grid connection point in watts (W).
Defines the power threshold for stopping charging in watts (W). Charging is stopped once the available charging power is less than this threshold. Available charging power is calculated based on power readings from the grid connection point, aux devices and battery power, depending on your battery settings. Check the [Manipulations Options](index.md#manipulation-options) section for more information on how these inputs and configuration parameters work together. The default threshold is the minimum charging power. Setting a lower value will continue charging even if not enough surplus is available and draw the additionally needed power from grid or if available a battery.

**Possible values**: A positive value for grid consumption, a negative value for grid export.

**Default value:** `0`
**Default value:** `0` (the system will use minimum charging power)

**For example**:

Expand All @@ -283,7 +281,7 @@ If a residual power offset for the desired operating point of the surplus regula

#### `delay`

Defines how long the `threshold` must be met.
Defines how long available charging power must fall under the `threshold` before charging is stopped. Also defines how long available charging power must be lower than power required for 3-phase charging before the system switches from 3-phase to 1-phase.

**Default value:** `3m`

Expand Down