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  1. mrzed001

    Deadly AC current on 12V battery terminal

    Not a joke :) Here is a little video with measurements demonstrating it: In Hungarian language, but in a browser you can turn on subtitles and set it to Auto translate to English What you see is a simple setup. From left to right 12V battery 230V EU style inverter (Line - Neutral =...
  2. mrzed001

    Rack LFP battery in EU ?

    Anyone bought 48V LiFePO4 rack batteries in EU ? Can you give me a link for the product and how much the price was with delivery ? Thanks.
  3. mrzed001

    EVE battery QR code B ?

    Hi ! We got this response from Dongguan Lightning for a new order of EVE LF280K order. Anyone can confirm that this B in the QR code does not mean it is GRADE B cell ? So this only differentiate cells sold for EV or solar ?
  4. mrzed001

    PowMr 5kW AIO inverter burned out

    Hi , OP bought and installed a new PowMr WM5k-III inverter about a month ago. Used it with 9 solar panels: - 6pcs of 410W, 49.5Voc, 40.9Vmpp - 3pcs of 390W, 45.06Voc, 38.01Vmpp. One of them was connected to a TIGO optimizer (because of shadows) All together 432Voc, (would be 475Voc in -10...
  5. mrzed001

    Epever MPPT killed MPP Solar inverter and LFP pack

    This happened to one of the members in the Hungarian off-grid community. OP has two 24V LiFePO4 packs connected paralel : - 280Ah EVE cells with JK BMS - 160Ah with cell level BMS Batteries where charged by: - MPP Solar 3024GK inverter with 6 solar panels - Epever 6420AN MPPT with 4 solar...
  6. mrzed001

    off-grid and hybrid system regulations

    I think I live in an off-grid stone age here in the middle of the EU. ? Really, the utility companies (and government) is stuck 10-20 years ago. They are stuck in the separated off-grid (an inverter can only have DC-battery and AC out connection) and the AC coupled hybrid era (need extra PLC to...
  7. mrzed001

    Munro: Peak into the Tesla Model 3 CATL LFP battery pack.

    First I tough this are the 310Ah CATL cells we can buy from china. But it seems the height is lower and the length is bigger.
  8. mrzed001

    Solar inverter for server UPS

    Hope this is the right topic. A company popped a question if they can use all-in-one inverters as UPS for they server racks/room (with LFP battery and PV) For my own little servers I use the MPP MK model as a double conversion UPS But for big like a rack full with 3U Dell servers ... I have...
  9. mrzed001

    Voltronic (MPP Solar) Axpert MAX II 8kW (non US) inverter first review + Pylontech battery

    This is a non US inverter. So it is an Off-grid (with grid support) 8kW, dual MPPT inverter for 220-240V 50-60Hz systems. The successor of the previous MAX 8kW inverter. That inverter is also the base for the US LV6548 inverter ... (in spanish but you can turn on subtitles in YT and set to...
  10. mrzed001

    MPP Solar + BMS communication/control

    Hi ! I want to build a 48V system with 16 EVE 280Ah cells, and 1(-2) MPP Solar inverter (5048MK aka Axpert King) But I want this system as an UPS. So no daily charge and discharge. I think battery to last long I charge it to 60-70% I know inverter is stupid. It has only the sum V of the cells...
  11. mrzed001

    MPP inverter galvanic isolated?

    Hi ! I have a problem. Here are inverters only allowed if locally certified, or if they are galvanic isolated. And I do not know if the MPP Solar inverters (like 5048 GMX or MK) are galvanic isolated or not. Any info ?
  12. mrzed001

    MPP 5048 MK is Online UPS ?

    Hi, I want to build mostly a UPS (for computers and some home appliance) solution with 280Ah cells (16 pieces, 48V) and MPP Solar inverter (parallel 2 inverter). I looked on the MPP Solar PIP 5048 MK model (EU): http://www.mppsolar.com/manual/PIP-MK%20%28PF1.0%29/PIP-MK%20manual-20190717.pdf...
  13. mrzed001

    SCC for 5kW PV (5-600V) to 48V battery

    Hi ! I am planning a grid-tie and an UPS system. - The grid-tie 5kW, 15 panel 350W serial (all 40Voc ... so together 600V) with Fronius or SolarEdge or other utility allowed inverter. (no hybrid inverter allowed) - UPS with MPP Solar inverter and 16x LiFePO4 cells 3,2V 280Ah (48V) - SCC that...
  14. mrzed001

    Grid tie inverter power generation in blackout/offgrid

    Hi I am searching for a solution. I want to make a grid tie system, that sells power to the grid. And a separate UPS system with MPP Solar inverter and lithium batteries. The possible grid tie inverters are limited, so no MPP Solar for example, but many Huawei, Fronius, SMA, Solaredge, SAJ...
  15. mrzed001

    MTTP with low Volt load disconnect

    Hi One of my friends want to make a small night light system (offgrid). Already has: - 1 piece 305W 40Voc solar panel - 1 piece 12V lead battery 70Ah - 1 piece 12V LED street light (self regulating with night switch and movement detector) So he needs an MPPT (30-40A output). Will this be too...
  16. mrzed001

    EU manual transfer switch for inverter-battery-PV UPS system

    Hi I am searching for a dual power manual transfer switch ... for 230V 50Hz EU system. Something like Reliance in US ... very-very like that :D https://www.powerequipmentdirect.com/Reliance-Controls-A506C/p50929.html (the extra circuit breakers in it ... I do not think I need it, but who cares...
  17. mrzed001

    BMS 48V questions with temp and size and communication

    Hi newbie here I have some questions about BMS I want to make a 16s 100A 48V system (Fortune cells) mainly for UPS reasons. And safety first ... 1, Is there a way to monitor the temperature of all 16 cells? 16 temp sensor ? 2, a 150A BMS is enough for a 100A system (like this Daly...
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