Big Deye 5kW Inverter Teardown 2025 - Quiescent and Standby Current | Part 6
Intro
This page has a lot off high-res photos with some analysis of the modern solar hybrid inverter DEYE SUN-5K-SG01/03/LP1-EU/AU.
⏭️ Because device has a lot of components I'm still updating article with more details. Moreover, article separated on several parts due to a lot of photos:
Sources
📦 All photos also available in archive (100MB+) : Teardown_DEYE_Inverter_SUN-5K-SG0103LP1-EUAU_refcircuit.com.zip
Objective
Measure battery quiescent current (when inverter turned off by button) and battery standby current (when enabled by button but load not connected).
Test Procedure
- Battery: 48V (Ebike)
- Grid: Not connected
- PV: Not connected
- Load: Not Connected
Quiescent Current
Measurements
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 |  |  |  |
 |  |  |
Data
| Input Voltage, V | Current, uA | Power, mW |
| 17.76 | 5620 | 100 |
| 20.80 | 5050 | 105 |
| 26.29 | 2629 | 69 |
| 31.66 | 3090 | 98 |
| 35.71 | 2350 | 84 |
| 37.27 | 2060 | 77 |
| 39.25 | 1700 | 67 |
| 42.42 | 1110 | 47 |
| 42.68 | 1080 | 46 |
| 45.56 | 530 | 24 |
| 47.40 | 190 | 9 |
Plot
Current
Power
Standby Current
Measurements
 |  |  |  |  |
Data
Data
| Input Voltage, V | Current, A | Power, W |
| 50.25 | 0.289 | 14.52 |
| 50.21 | 0.389 | 19.65 |
| 50.08 | 0.677 | 33.90 |
| 49.95 | 1.013 | 50.60 |
Conclusions
| 🟢 | When power button not pressed (inverter turned off) the Iq=100uA or lower for 16S |
| 🟡 | When power button is pressed (inverter turned on) the Istdby=0.2-1A |