diff --git a/docs/hardware.md b/docs/hardware.md
index 97c1ba7..cbddd31 100644
--- a/docs/hardware.md
+++ b/docs/hardware.md
@@ -6,7 +6,6 @@
### A388 System-On-Chip
-
## Connector / Interface List
@@ -77,6 +76,34 @@ Helios4 board exposes on header J9 the SoC I2C Bus 1. Below is the header pin-ou
+## Power Consumption
+
+**Board only**
+
+* Idle : 3.6 Watts
+* Active : 5.6 Watts
+
+**Full Kit (with 4x HDDs)**
+
+| State | AC calculated
power consumption | DC measured
power consumption | Remarks |
+|---------------------|----------------------|----------------------|---------------------|
+| Idle | 19.3 W | 16.8 W | |
+| HDD Read Access | 27.4 W | 22.8 W | |
+| HDD Write Access | 30.3 W | 25.2 W | |
+| Standby | 8.0 W | 6.7 W | HDD in Standby mode |
+| Suspend-to-Ram | 7.2 W | 6.0 W | HDD in Standby mode |
+
+!!! note
+ Measures were done using a Current Clamp Meter on the Helios4 12V DC input. AC Power consumption is calculated based on a AC/DC conversion efficiency of 85%.
+
+ * Meter tool : Extech 380942 - 30A True RMS AC/DC Mini Clamp
+ * AC/DC Adapter : yczx1268 (efficiency : 85%)
+ * AC Input Voltage: 220V
+ * HDD: 4x WD Red 2TB (WD20EFRX) configured as RAID10
+ * Network : Connected at 1000Mb/s
+ * OS: ARMBIAN 5.73 stable Debian GNU/Linux 9 (stretch) 4.14.98-mvebu
+
+
## HDD Recommendation List
We recommend HDD which are designed for NAS (Network Attached Storage). Those NAS HDD are specially conceived for reliable 24/7 operation and offers lower power consumption and dissipation, less vibration and noise, and finally better warranty. We recommend the following models :
diff --git a/docs/wol.md b/docs/wol.md
index 146f010..03c4876 100644
--- a/docs/wol.md
+++ b/docs/wol.md
@@ -165,16 +165,14 @@ Measured using Sonoff POW R2 on AC side
| Power state | Power (Watt) | Current (Ampere) | Remarks |
|---------------|---------------|------------------|---------|
-| Idle | 16.18 - 19.87 | 0.14 - 0.17 | |
-| Standby | 8.24 - 8.63 | 0.09 - 0.10 | |
-| Suspend | 7.46 - 7.71 | 0.07 - 0.08 | |
-| Halt/Shutdown | 11.95 | 0.11 | HDDs still active, fans run on full speed |
+| Idle | 19.87 | 0.17 | |
+| Standby | 8.63 | 0.10 | HDD in Standby mode |
+| Suspend | 7.71 | 0.08 | HDD in Standby mode |
!!! note
* Nominal Input Voltage: 220V
* HDD: 4x WD Red 2TB (WD20EFRX)
* [I2C OLED screen](/i2c/) attached to the systems
- * Variation of power consumption sometimes due to fluctuation of the input voltage
## Issues
@@ -190,4 +188,4 @@ Therefore it is advised to always enable WOL (**sudo ethtool -s eth0 wol g**) be
When system is put in suspend mode, the PWM feature controlling the fan speed is stopped. The fans will either spin at their lowest speed ([Batch 1 fan](/pwm/#old-fan-batch-1)) or stop spinning ([Batch 2 fan](/pwm/#new-fan-batch-2)). In the latest case, while this is not an issue for the SoC itself which is designed to run with passive cooling, it might have a negative impact on the HDD peripherals because the ambient temperature inside the case will rise.
-Therefore it is advised to ensure that when system is suspended the case ambient temperature will not exceed the operating temperature your HDDs are rated for.
+**Therefore it is advised to ensure that when system is suspended the case ambient temperature will not exceed the operating temperature your HDDs are rated for.**