Struct ProsumerMeterInput 

pub struct ProsumerMeterInput {
    pub grid_consumption_kwh: Decimal,
    pub self_consumption_kwh: Decimal,
    pub export_kwh: Option<Decimal>,
}

Prosumer meter data — combines grid consumption with PV self-consumption.

A prosumer simultaneously consumes electricity (partly from the grid, partly from their own PV plant) and may export surplus generation to the grid.

LF billing scope (energy-billing)

The Lieferant bills grid consumption only. Self-consumption billing and EEG feed-in remuneration (Einspeisevergütung) are handled by eeg-billing.

Stromsteuer exemption

§ 9 Abs. 1 Nr. 3 StromStG exempts self-consumed electricity from plants up to 2 MW from Stromsteuer. This is applied automatically when self_consumption_kwh > 0.

Network charge exemption

Netzentgelte are charged for Netznutzung — the § 17 StromNEV Arbeits- and Leistungspreis are levied on what is taken from the grid at the Entnahmestelle. Self-consumed electricity never enters it, so it is outside that base and no NNE applies to self_consumption_kwh. This is not the § 14a EnWG reduction, which is a reduced Netzentgelt for a controllable load that does draw from the grid.

Example

use energy_billing::ProsumerMeterInput;
use rust_decimal::dec;

let m = ProsumerMeterInput {
    grid_consumption_kwh: dec!(250),   // drawn from grid → full tariff
    self_consumption_kwh: dec!(150),   // from own PV → Stromsteuer-exempt, no Netznutzung
    export_kwh: Some(dec!(100)),       // fed back to grid (via eeg-billing)
};
assert_eq!(m.total_consumption_kwh(), dec!(400));

Fields

grid_consumption_kwh: Decimal

Electricity drawn from the public grid (kWh).

Full tariff applies: Arbeitspreis + NNE + Stromsteuer.

self_consumption_kwh: Decimal

Electricity generated by the customer’s PV plant and consumed on-site (kWh).

• No NNE (does not transit the grid)
• No Stromsteuer on the self-consumed part (§ 9 Abs. 1 Nr. 3 StromStG)
• Appears as an informational invoice line showing the self-supply ratio

export_kwh: Option<Decimal>

Electricity exported to the grid (kWh). Informational only.

This quantity is handled by eeg-billing (EEG Einspeisevergütung), not by energy-billing. Included here so the retail invoice can show the complete energy balance to the customer (§41 EnWG transparency).

Implementations

impl ProsumerMeterInput

pub fn total_consumption_kwh(&self) -> Decimal

Total electricity consumption (grid + self, kWh).

pub fn self_supply_ratio(&self) -> Decimal

Self-supply ratio (0.0–1.0): share of total consumption from own PV.

Trait Implementations

impl Clone for ProsumerMeterInput

fn clone(&self) -> ProsumerMeterInput

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProsumerMeterInput

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ProsumerMeterInput

fn default() -> ProsumerMeterInput

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProsumerMeterInput

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ProsumerMeterInput

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.