Extreme teardown of the Deye SUN-5K-SG04LP1 5kW hybrid solar inverter.
Will it contain the quality components claimed?
Also a topology reverse engineering of all the stages.
Hi-Res photos:
00:00 – A generous and coincidental donation from a viewer
00:37 – We have the brochure, let’s check the claims!
02:44 – Front panel PCB
03:46 – The gigantic heatsink
04:44 – Nippon Chemi-Con Capacitors? REALLY?
05:54 – Heatsunk and potted inductors and transformer teardown
10:19 – Main PCB’s and the confusing layout
12:53 – The fused battery input
13:37 – Are the MOSFET’s and IGBT’s as advertised?
15:10 – SMD high current links for PnP benefits
16:14 – Detailed circuit topology schematic reverse engineering
18:29 – Earth connection testing
19:07 – MOSFET vs IGBT
19:51 – Grid side IGBT switching and tri-level switching
20:46 – Solar Panels are capacitors to earth and that screws the CMRR
21:34 – HERIC switching topology and patent lawsuits!
23:50 – Grid and Load connections
25:07 – The battery bidirectional DC-DC converter
28:14 – H-Bridge and parallelism
30:14 – Switching drive stages
31:25 – Main processor PCB and a TI DSP ripoff?
32:51 – Redundant backup DSP controller?
34:40 – Genrator and Load conection relay switching
35:49 – Panasonic Relays? WHERE?
37:02 – User Connection PCB
38:25 – Conclusion
Datasheets:
https://www.fet.discoveree.io/datasheet.php?view=pdf&file=crmicro/crsq027n10n.pdf
https://www.magnachip.com/wp-content/uploads/2020/10/MBQ40T65QES-1.pdf
https://www.lcsc.com/datasheet/lcsc_datasheet_2209081730_Wuxi-NCE-Power-Semiconductor-NCE40TS120VTP_C5160411.pdf
https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2211151030_Vishay-Intertech-VS-EPX3007L-N3_C5263741.pdf
ADVchip DSP: https://file.elecfans.com/web2/M00/6F/21/poYBAGNEwS-AKpNeAIfcFmyDrAQ938.pdf
AVP32F335 DSP: http://advancechip.com/mobile/32fd/61.html
Fraunhofer ISE Successful in Patent Infringement Process for HERIC Inverter Technology:
https://www.ise.fraunhofer.de/en/press-media/press-releases/2022/fraunhofer-ise-successful-in-patent-infringement-process-for-inverter-technology.html
Forum: https://www.eevblog.com/forum/blog/eevblog-1620-deye-solar-hybrid-inverter-extreme-teardown/