diff --git a/central_backend/src/app_config.rs b/central_backend/src/app_config.rs
index c03cd63..09a7130 100644
--- a/central_backend/src/app_config.rs
+++ b/central_backend/src/app_config.rs
@@ -2,6 +2,12 @@ use crate::devices::device::{DeviceId, DeviceRelayID};
 use clap::{Parser, Subcommand};
 use std::path::{Path, PathBuf};
 
+#[derive(Copy, Clone, Debug)]
+pub enum ConsumptionHistoryType {
+    GridConsumption,
+    RelayConsumption,
+}
+
 /// Electrical consumption fetcher backend
 #[derive(Subcommand, Debug, Clone)]
 pub enum ConsumptionBackend {
@@ -262,10 +268,20 @@ impl AppConfig {
     }
 
     /// Get energy consumption history file path for a given day
-    pub fn energy_consumption_history_day(&self, number: u64) -> PathBuf {
+    pub fn energy_consumption_history_day(
+        &self,
+        number: u64,
+        r#type: ConsumptionHistoryType,
+    ) -> PathBuf {
         self.storage_path()
             .join("consumption_history")
-            .join(number.to_string())
+            .join(format!(
+                "{number}-{}",
+                match r#type {
+                    ConsumptionHistoryType::GridConsumption => "grid",
+                    ConsumptionHistoryType::RelayConsumption => "relay-consumption",
+                }
+            ))
     }
 }
 
diff --git a/central_backend/src/energy/consumption_history_file.rs b/central_backend/src/energy/consumption_history_file.rs
index 0ffa290..d4dc96b 100644
--- a/central_backend/src/energy/consumption_history_file.rs
+++ b/central_backend/src/energy/consumption_history_file.rs
@@ -1,4 +1,4 @@
-use crate::app_config::AppConfig;
+use crate::app_config::{AppConfig, ConsumptionHistoryType};
 use crate::energy::consumption::EnergyConsumption;
 use crate::utils::time_utils::day_number;
 
@@ -16,13 +16,14 @@ pub enum ConsumptionHistoryError {
 pub struct ConsumptionHistoryFile {
     day: u64,
     buff: Vec<EnergyConsumption>,
+    r#type: ConsumptionHistoryType,
 }
 
 impl ConsumptionHistoryFile {
     /// Open consumption history file, if it exists, or create an empty one
-    pub fn open(time: u64) -> anyhow::Result<Self> {
+    pub fn open(time: u64, r#type: ConsumptionHistoryType) -> anyhow::Result<Self> {
         let day = day_number(time);
-        let path = AppConfig::get().energy_consumption_history_day(day);
+        let path = AppConfig::get().energy_consumption_history_day(day, r#type);
 
         if path.exists() {
             Ok(Self {
@@ -32,20 +33,22 @@ impl ConsumptionHistoryFile {
                     bincode::config::standard(),
                 )?
                 .0,
+                r#type,
             })
         } else {
             log::debug!(
                 "Energy consumption stats for day {day} does not exists yet, creating memory buffer"
             );
-            Ok(Self::new_memory(day))
+            Ok(Self::new_memory(day, r#type))
         }
     }
 
     /// Create a new in memory consumption history
-    fn new_memory(day: u64) -> Self {
+    fn new_memory(day: u64, r#type: ConsumptionHistoryType) -> Self {
         Self {
             day,
             buff: vec![0; (3600 * 24 / TIME_INTERVAL) + 1],
+            r#type,
         }
     }
 
@@ -87,7 +90,7 @@ impl ConsumptionHistoryFile {
 
     /// Persist device relay state history
     pub fn save(&self) -> anyhow::Result<()> {
-        let path = AppConfig::get().energy_consumption_history_day(self.day);
+        let path = AppConfig::get().energy_consumption_history_day(self.day, self.r#type);
         std::fs::write(
             path,
             bincode::encode_to_vec(&self.buff, bincode::config::standard())?,
diff --git a/central_backend/src/energy/energy_actor.rs b/central_backend/src/energy/energy_actor.rs
index b580f8f..06a7b3b 100644
--- a/central_backend/src/energy/energy_actor.rs
+++ b/central_backend/src/energy/energy_actor.rs
@@ -1,4 +1,4 @@
-use crate::app_config::AppConfig;
+use crate::app_config::{AppConfig, ConsumptionHistoryType};
 use crate::constants;
 use crate::devices::device::{
     Device, DeviceGeneralInfo, DeviceId, DeviceInfo, DeviceRelay, DeviceRelayID,
@@ -53,17 +53,26 @@ impl EnergyActor {
             });
         self.consumption_cache.add_value(latest_consumption);
 
-        let mut history = ConsumptionHistoryFile::open(time_secs())?;
+        let devices_list = self.devices.full_list();
+
+        let mut history =
+            ConsumptionHistoryFile::open(time_secs(), ConsumptionHistoryType::GridConsumption)?;
         history.set_consumption(time_secs(), latest_consumption)?;
         history.save()?;
 
+        let mut relays_consumption =
+            ConsumptionHistoryFile::open(time_secs(), ConsumptionHistoryType::RelayConsumption)?;
+        relays_consumption.set_consumption(
+            time_secs(),
+            self.engine.sum_relays_consumption(&devices_list) as EnergyConsumption,
+        )?;
+        relays_consumption.save()?;
+
         if self.last_engine_refresh + AppConfig::get().refresh_interval > time_secs() {
             return Ok(());
         }
         self.last_engine_refresh = time_secs();
 
-        let devices_list = self.devices.full_list();
-
         self.engine
             .refresh(self.consumption_cache.median_value(), &devices_list);
 
diff --git a/central_backend/src/energy/engine.rs b/central_backend/src/energy/engine.rs
index 54d3190..0d3f2dd 100644
--- a/central_backend/src/energy/engine.rs
+++ b/central_backend/src/energy/engine.rs
@@ -115,6 +115,10 @@ impl EnergyEngine {
         self.relays_state.get_mut(&relay_id).unwrap()
     }
 
+    pub fn sum_relays_consumption(&self, devices: &[Device]) -> usize {
+        sum_relays_consumption(&self.relays_state, devices)
+    }
+
     fn print_summary(&mut self, curr_consumption: EnergyConsumption, devices: &[Device]) {
         log::info!("Current consumption: {curr_consumption}");
 
@@ -166,7 +170,7 @@ impl EnergyEngine {
         curr_consumption: EnergyConsumption,
         devices: &[Device],
     ) -> EnergyConsumption {
-        curr_consumption - sum_relays_consumption(&self.relays_state, devices) as i32
+        curr_consumption - self.sum_relays_consumption(devices) as i32
     }
 
     /// Refresh energy engine; this method shall never fail !