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plans/fizzy-prancing-meerkat.md
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# Power Flow Card Plus Fix - Energy Flow Display Correction ✓ SOLVED
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## Problem Summary
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The Power Flow Card Plus was incorrectly showing that all solar production was consumed by home, with no grid feed-in displayed. In reality, the system was feeding excess solar back to the grid.
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**Root Cause**: Wrong entity used for grid "Production" - was using cumulative energy sensor (kWh) instead of instantaneous power sensor (W).
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## What Changed
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### OLD Configuration (Working)
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```yaml
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grid:
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entity:
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consumption: "sensor.tagstromverbrauch_momentan" # Grid consumption
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production: "sensor.tagstromverbrauch" # Grid feed-in
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home:
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use_metadata: true # Card auto-calculates: Solar + Grid = Home
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```
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### NEW Configuration (Broken)
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```yaml
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grid:
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entity: "sensor.grid_verbrauch_gesamt" # Combined, consumption-only
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home:
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use_metadata: true # Can't calculate properly without grid feed-in data
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```
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## ✅ SOLUTION (User Found & Verified Working)
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**Use separated grid entities with correct sensors:**
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- **Consumption**: `sensor.grid_verbrauch_gesamt` (Tag + Nacht combined in W)
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- **Production**: `sensor.tagstromverbrauch` (instantaneous power in W)
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**Key**: Must use `tagstromverbrauch` (power), NOT `tagstromverbrauch_ausgehend` (cumulative energy)!
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### Why This Works
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1. **Includes both circuits**: `grid_verbrauch_gesamt` combines Tagstrom + Nachtstrom (LOGAREX)
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2. **Correct unit**: `tagstromverbrauch` is instantaneous power (W), not cumulative energy (kWh)
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3. **Proper energy flow calculation**: Card can now calculate: Home = Solar - Grid_Feed_in
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4. **Verified working**: Display shows Solar 3.1 kW → Home 317W, Grid -2.8 kW feed-in ✓
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## ✅ Implementation (Already Done by User)
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### Configuration via Home Assistant UI
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**Power Flow Card Plus → Grid Section:**
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1. Expand "Separated Entities" section
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2. **Consumption**: Select `Grid Verbrauch Gesamt`
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3. **Production**: Select `Tagstromverbrauch` (NOT `Tagstromverbrauch_ausgehend`!)
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**Result in `/config/.storage/lovelace`:**
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```json
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"grid": {
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"display_state": "one_way",
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"entity": {
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"consumption": "sensor.grid_verbrauch_gesamt",
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"production": "sensor.tagstromverbrauch"
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},
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"invert_state": false,
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"use_metadata": false,
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"secondary_info": {}
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}
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```
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### No Additional Steps Required
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The card calculates home consumption automatically with `use_metadata: true`:
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```
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Home = Solar - Grid_Production + Grid_Consumption
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= 3.1 kW - 2.8 kW + 0 kW
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= 0.3 kW (300W) ≈ 317W shown ✓
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```
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## Critical Files
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- **Power Flow Card Config**: `/config/.storage/lovelace` (SSH: icke@172.20.70.10)
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- **Template Sensors**: `/config/configuration.yaml`
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- **Git Repository**: `/config/.git/` (use `sudo git` for commands)
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## ✅ Verified Behavior (Working)
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**Current Display (from user screenshot):**
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- **Solar**: 3.1 kW production
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- **Grid**: -2.8 kW (negative = feeding to grid)
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- **Home**: 317 W consumption
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- **Energy flows**: Solar→Home (small line), Solar→Grid (large line)
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**Calculation verification:**
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```
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Solar production: 3.1 kW
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Home consumption: 0.317 kW
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Excess to grid: 3.1 - 0.317 = 2.783 kW ≈ 2.8 kW ✓
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```
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## ✅ Verification Complete
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User confirmed working configuration:
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- ✅ Solar production displays correctly (3.1 kW)
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- ✅ Grid shows negative value when feeding in (-2.8 kW)
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- ✅ Home consumption realistic (317 W, not 3.1 kW)
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- ✅ Energy flow arrows display correctly
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## Recommended Git Commit
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Document this fix in git:
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```bash
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ssh icke@172.20.70.10
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cd /config
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sudo git add .storage/lovelace
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sudo git commit -m "Fix: Power Flow Card Plus - Use correct sensors for grid consumption/production
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Grid configuration:
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- Consumption: sensor.grid_verbrauch_gesamt (Tag + Nacht combined, W)
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- Production: sensor.tagstromverbrauch (instantaneous power, W)
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Previous issue: Used tagstromverbrauch_ausgehend (cumulative kWh) which showed
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as 38,550 kW instead of actual feed-in power.
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Verified working: Solar 3.1kW → Home 317W, Grid feed-in -2.8kW
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>"
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```
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## Key Lesson Learned
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**The Problem Was NOT Missing Home Entity**
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The user initially thought: "we need to add some entity in the home section"
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**Actual problem**: Grid "Production" was using wrong sensor type:
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- ❌ `tagstromverbrauch_ausgehend` - cumulative energy (kWh) - totals 38,550!
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- ✅ `tagstromverbrauch` - instantaneous power (W) - shows ~2.8 kW
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The card needs **instantaneous power (W)** for both consumption and production to calculate energy flows correctly.
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## Summary for Documentation
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**Problem**: Power Flow Card showing all solar going to home (incorrect)
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**Root Cause**: Grid production entity was cumulative energy (kWh) instead of instantaneous power (W)
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**Solution**:
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```
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Grid → Separated Entities:
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Consumption: sensor.grid_verbrauch_gesamt
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Production: sensor.tagstromverbrauch (NOT tagstromverbrauch_ausgehend)
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```
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**Result**: Correct display showing solar → home (small) + solar → grid feed-in (large) ✓
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## Sources
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- [Power Flow Card Plus GitHub](https://github.com/flixlix/power-flow-card-plus)
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- [Home Assistant Community - How does Power Flow Card Plus calculate home consumption](https://community.home-assistant.io/t/how-does-the-power-flow-card-plus-calculate-home-energy-consumption/721252)
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