Treat battery as a consumer (no prioritisation)

lib/splitter.rb

@@ -19,9 +19,9 @@ def initialize(config, **kwargs)
               :custom_power
 
   def call
-    remaining = grid_power_for_consumers
+    remaining = grid_import_power
 
-    # Prioritize wallbox power over all other consumers
+    # Prioritize wallbox and battery charging over all other consumers
     if remaining&.positive? && wallbox_power&.positive?
       wallbox_power_grid = [wallbox_power, remaining].min
       remaining -= wallbox_power_grid
@@ -32,7 +32,8 @@ def call
     # Distribute the remaining grid power among the other consumers
     {
       wallbox_power_grid:,
-      battery_charging_power_grid:,
+      battery_charging_power_grid:
+        grid_power(remaining, battery_charging_power),
       house_power_grid: grid_power(remaining, house_power),
       heatpump_power_grid: grid_power(remaining, heatpump_power),
     }.tap do |result|
@@ -46,27 +47,11 @@ def call
 
   private
 
-  # Calculate the grid power used by all consumers
-  def grid_power_for_consumers
-    return unless grid_import_power
-
-    # When battery is charging while importing from the grid,
-    # the battery is prioritized over all consumers.
-    # Examples: Emergency charging or charging during low grid prices
-    [grid_import_power - (battery_charging_power || 0), 0].max
-  end
-
-  def battery_charging_power_grid
-    return unless grid_power_for_consumers
-
-    # All the grid power not used by consumers is used to charge the battery
-    grid_import_power - grid_power_for_consumers
-  end
-
-  # Sum up all consumers except wallbox power
+  # Sum up all consumers except wallbox power and battery charging power
   def other_total
     @other_total ||=
-      (house_power || 0) + (heatpump_power || 0) + custom_power_total
+      (house_power || 0) + (heatpump_power || 0) +
+        (battery_charging_power || 0) + custom_power_total
   end
 
   # Sum up only the custom sensors explicitly excluded from house power

spec/lib/splitter_spec.rb

@@ -126,22 +126,22 @@
     context 'when battery is charging from grid' do
       let(:record) do
         {
-          # inverter_power: 0
+          # inverter_power: 100
           grid_import_power: 100,
           house_power: 10,
           heatpump_power: 30,
-          wallbox_power: 60,
+          wallbox_power: 30,
           battery_charging_power: 100,
         }
       end
 
       it 'returns battery-first' do
         expect(call).to eq(
           {
-            house_power_grid: 0,
-            heatpump_power_grid: 0,
-            wallbox_power_grid: 0,
-            battery_charging_power_grid: 100,
+            house_power_grid: 5,
+            heatpump_power_grid: 15,
+            wallbox_power_grid: 30,
+            battery_charging_power_grid: 50,
           },
         )
       end
@@ -150,8 +150,8 @@
     context 'when battery is charging partly from grid' do
       let(:record) do
         {
-          # inverter_power: 20
-          grid_import_power: 40,
+          # inverter_power: 30
+          grid_import_power: 30,
           house_power: 10,
           heatpump_power: 30,
           wallbox_power: 0,
@@ -160,13 +160,13 @@
         }
       end
 
-      it 'returns all zero' do
+      it 'calculates' do
         expect(call).to eq(
           {
             house_power_grid: 5,
             heatpump_power_grid: 15,
             wallbox_power_grid: 0,
-            battery_charging_power_grid: 20,
+            battery_charging_power_grid: 10,
           },
         )
       end
@@ -220,6 +220,30 @@
       end
     end
 
+    context 'when wallbox and battery charging' do
+      let(:record) do
+        {
+          # inverter_power: 2000
+          grid_import_power: 21_000,
+          wallbox_power: 21_000,
+          house_power: 600,
+          heatpump_power: 100,
+          battery_charging_power: 1300,
+        }
+      end
+
+      it 'returns wallbox-first' do
+        expect(call).to eq(
+          {
+            battery_charging_power_grid: 0.0,
+            heatpump_power_grid: 0.0,
+            house_power_grid: 0.0,
+            wallbox_power_grid: 21_000,
+          },
+        )
+      end
+    end
+
     context 'when custom power is given (100% consumption)' do
       let(:record) do
         {