DrLoLCat

Item Wanted: Imeon IMA box Packaging Essential: no Desired Age: any Location: any Willing to accept a shipped item: yes Ballpark/Budget Amount: R1200

What's the deal with this picture of Sunsynk 5kW that has a fan: Can find it on a few websites. https://www.arsolar.co.za/product/5kw-sunsynk-invertervat-incl/

@freierMenschwhere is the "about" text that you mention in your post? I'm very interested in the advanced settings. I am already in pro mode. See below. Hi,

It's annoying that Setting 11 also gets overridden by the BMS. I consider that a bug. There is no point to it if setting 2 is overridden. I have the issue that this is causing the generator to overload in an off-grid installation. Such BS sigh.

This worked perfectly with the first iteration of settings by the way. The installation has been running without any intervention for 2.5 months. I also did the wiring as per the above drawing to keep the current through any individual piece of cable as low as possible.

Hi, I have a VMIII and I need to update the removable screen firmware to a version that supports "LiB". This is according to the supplier what is required for the VMIII to communicate with Giter batteries. I see "LiB" has been remove in the latest removable screen firmware. My firmware is however old. U1: 41.14 U2: 02.40 (Can I update this to 02.49, using the below while keeping U1: 41.14) U3: 00.24 Is it possible to flash the removable screen with a USB cable only or do you need RJ45 serial? @Coulomb

The BMS of the Pylon stack will only be talking to to the VM III inverter. Thanks for the advice about letting BMS control last stage of charging, I will set up the voltages accordingly. I understand 5x Pylons can take 185A but what about the 25mm2 Pylon cables? I believe the current carrying capacity is 120A. So then, does that mean the BMS in a 5x Pylon stack will limit to 120A? Or self-protect to 120A to avoid cables burning? If the BMS actually allows the full 185A, that would mean I have to do something like the wiring shown below to avoid cables burning? (assuming I add more solar panels to enable 185A) Please review my wiring. Or is this actually unnecessary?

Thank you very much for the advice. I have a Bluesolar MPPT 150/70 that is currently not being used. I'll be very happy if I can use it in parallel with VMIII BMS charging. My concern with this was only about non-BMS charging in parallel with BMS charging from the VMIII. As you pointed out I won't have to worry about charging with too much current at least. If there is nothing else to be concerned about I will follow this solution and program the Victron Bluesolar MPPT with Absorption 53.2V and Float 51V. Victron equipment (in BMS mode) however seems to charge Pylons at 52.4V even if the BMS requests 53.2V. I will probably take a connection from every 2nd or 3rd Pylon to the busbar when I add this additional charging capacity. The limit on Pylon cables is 120A.

I have an off grid solar system with VMIII: 16 x 340W solar panels (North-West) - 2 strings of 8 panels each 4 x US3000 Pylontech I am missing out on some good sun in the early morning, which I want to capture as follows: Add another US3000 to the existing VMIII Add another VMIII or King with solar panels connected from the rooftop which gets son in the early morning. This new VMIII or King would then have its AC output permanently wired to the grid input of the existing VMIII which would be set to charge from utility and solar. I can have the new VMIII or King run from an old lead acid or no battery, I only want it to send solar power to the downstream inverter which charges the 5x US3000 Pylontechs Will this work? Of course this would not have been required if the VMIII could parallel.

Will this work to monitor real time values in Watchpower? Or should I just use the USB mini port with USB extenders? I saw a post here saying the USB connection was not designed for continuous data transfer.

Price Drop: R11,000

Update: Didn't bond it. But the inverter bonds neutral and earth. All is good.

According to this post, the VMIII will never ground the neutral by itself. So is having the neutral voltage floating acceptable then?

Thanks Jaco. This is for an off-grid installation. There is no utility connected. Only a gennie on the input which will be used if battery is empty. So there is no N-E bond on the input. Are you saying that even for this off-grid application N-E should not be bonded on the inverter output?

Thanks for the response. Why should there not be an N-E bond?