Uploaded June 2025 | Updated September 2026, 2 weeks ago

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Solar Power is awesome and it is getting cheaper and cheaper. But is that good? I mean are the inverters getting worse because they get cheaper? Well, in this video I will be having a closer look at an absolute cheapy. I will test its performance, efficiency and have a look inside to see what is going on. At the end I will then try to upgrade it using the newest and greatest SiC MOSFETs. Let's get started!

Websites that were shown in the video:
mouser.de/datasheet/2/196/Infineon_IMW120R020M1H_DataSheet_v01_30_EN-3362492.pdf
infineon.com/cms/en/product/power/mosfet/silicon-carbide
https://www.bau-tech.shop/markensuche/victron/geraetekombinationen/48v/victron-multiplus-ii-48-5000-70-50-230v-wechselrichter-ladegeraet-0-mwst
js-solartechnik.de/p/hybrid-wechselrichter-5kw-5000w-48v-off-grid-solar-pv-photovoltaik-laderegler-ivem5048
solarhandel24.de/products/ja-solar-450w-bifazial-glas-glas-black-frame-jam54d40-ab-6-modulen?_pos=3&_fid=1d5bffaa6&_ss=c
ourworldindata.org/grapher/installed-solar-pv-capacity?time=2007..latest
static6.arrow.com/aropdfconversion/b6ec414d89567dbb18f3f805168f66ae48ece692/kgf75n65kdf.pdf

Thanks to Infineon Technology for sponsoring this video!

0:00 Is Cheaper always Better?!
1:06 Intro
1:29 Cheap Inverter Overview
3:33 Load/Efficiency Test
4:37 Power Loss Source?
6:33 IGBT Conduction Losses
8:17 IGBT Switching Losses
10:36 SiC MOSFET in Inverter & Test
11:15 Verdict