Raw: Solar: Prevent over-voltage of Demuda MPPT causing inverter shutdown w/ battery volt high fault скачать в хорошем качестве

Raw: Solar: Prevent over-voltage of Demuda MPPT causing inverter shutdown w/ battery volt high fault

TLDR: Raw troubleshooting video of how I found-out that the over-voltage issue of my solar setup was causing my inverter to shutdown - and how I fixed the problem. ISSUE: Over-voltage up to 17v+ on my small 12v solar setup using Demuda 60a MPPT SCC, which causes the inverter to shutdown due to "battery voltage high" fault. This happens when battery is full (with no load). SCENARIO: Was alarmed when I saw 15v+ on my volt meter at 1pm+ today - it even reached 17.2v as I was taking this video. My solar setup had no load coz I was trying to full-charge my battery since yesterday. So, I turned-on my One Solar 12v 1kw toroidal inverter to put on some load. But after a few minutes, it showed a red fault warning with message "Battery volt. high", then it eventually shut down! I later read in the inverter’s manual that this fault shows when battery voltage is higher than 15v, and the inverter shuts-down when voltage goes beyond 17v. And that explains why my inverter suddenly turned-off while I was trying to add load to my setup. Btw, my cheap 50a BMS was doing active balancing while all this was happening. TRIED: Set the Demuda MPPT SCC - FLD (floating voltage or charging voltage??) setting to 14.2v. The default value was 13.8v but I noticed that it was "clipping" my harvest to only 160watts+ during sunny days, so I set it up to 14.4v which yields good harvest of up to 200watts+ on my 300watts panels. I didn't know this will cause this over-voltage problem when my battery is full, with no load, and system is still harvesting. FIX: I eventually settled to the FLD value of 14v, not shown in the video coz I did it after almost an hour of observation. I hope to still get good harvest while keeping my system "safe" from this over-voltage problem. PS: My Demuda MPPT is just a re-brand and saw other brands in Shopee that look the same: PowMr, Aoyang/Aoyong, MakeSkyBlue, EcgSolax, Flowatt, etc. So I guess this problem (and potential fix or workaround) also applies to them too? RELATED:    • Raw: Solar: Prevent over-voltage on green ...      • Raw: Issue: Over-voltage problem of green ...   My small 12v 1kw solar setup: Demuda 60a MPPT SCC (solar charge controller) with wifi (via Tuya app), model: LM6048 One Solar 12v 1kw toroidal inverter 300watts panels (3 x 100watts in series, fake Suntree and Qualfull brands) 4s27.5p ~117ah lifepo4 battery (mix of 32650 b1 and b2 variants) LINKS: Items used in my setup (affiliate links): 1. Demuda 60A wih Wifi MPPT Solar Charge Controller 12V 24V 36V 48V DC Input 180V LCD Display. Starts at ₱2,235 only. Shopee: https://s.shopee.ph/4q9M8CZc38 2. One Solar 12v 1kw toroidal inverter - not Snadi Snat Deye Inverter for ₱5,275. Shopee: https://s.shopee.ph/5L4lOuCbmW 3. Dagupan Solar/DSP 32650 lifepo4 batteries 5000-5800mAh 3.2V (PLS READ DESCRIPTION) per piece for ₱66. Shopee: https://s.shopee.ph/W0DXsn3kV 4. Power central 32650/32700 lifepo4 solar batteries 6500mAh 3.2V By Tipsun for ₱145 - ₱155. Shopee: https://s.shopee.ph/8KfinXn68P 5. Premier Hardware - Pemzz MCBs - AC & DC Circuit Breaker for Solar Mini Circuit Breaker Switch 6A/10A/16A/20A/25A/32A/40A/50A/63A - Shopee: https://s.shopee.ph/9UsZuemyV0 6. PowMr Green PWM SCC 30a, only php150 on Shopee: https://s.shopee.ph/7KnBausY7s 7. JolliKing Ph - JQX-62F 2Z 80A Electric (high power) Relay 12V DC 220V AC DPDT PCB Relay Module Electric Motor Relay at 71% off! ₱293 only. - Shopee: https://s.shopee.ph/1BFkWvYvyq 8. DIYMORE Transparent Shell Relay Dc 12V 10A Coil Power Ly2Nj Small Module Dpdt 8 Pin Led Lamp Indication at 60% off! ₱69 - ₱87 only. Shopee: https://s.shopee.ph/AUnx8IA3KK DISCLAIMERS: 1. This is a DIY video and I am NOT an electrician or solar technician. Pardon my lack of technical knowledge and terms. Follow my tips at your own risk. 2. My solar setup is what I can afford to DIY-build practically, positive feedback is highly appreciated. 3. I mostly use Filipino language (or vernacular like Bisaya or Ilonggo) on my videos. Hope Youtube translates it good. 🙏🌞 cyril