Sean

Was the SSR mounted on a suitably specified heatsink ?

What wattage is the kettle ? And what is the max current rating of those batteries ?

That's just 48kWh of cells .....

I have around 250kWh of Leaf cells running Victron ESS - not exactly a DIY task job as it all just bolts together.

Could you post links to those reports please.

Vd isn't the sole variable to be considered when calculating wire guage.

Manufacturers instructions always overule any local regulations, and certainly take presendence over assumptions regarding "looking about right"

The sizes I mentioned above are as per the Victron MPII manual.

MPII 5K battery cable should be 70mm MPII 3K battery cable is 35mm

Another vote for SketchUp - here's one I made earlier, just galvanised box and angle.

http://www.iotawatt.com/

The MP uses a CT to measure current, so dont expect high precision at such low levels.

Ah thanks, I thought you'd found a way of feeding a DC shunt of sensor data directly.

Can I ask how you are getting the DC battery usage data into eMon ?

Assuming you have followed the Venus to WM4 connections correctly, and selected Automatic in Venus under Battery Monitor your WM will be found automatically, and assuming you have the shunt fitted you'll see the charge/discharge rates, shunt voltage and SoC within Venus. The toolkit settings for logic will largely be dictated by your battery, certainly in terms of cell voltages, and charge/limited charge rates - critical actions will depend on what means you have to load shed via shunt trips etc.

That's the product designed by 4eco, before they did the usual startup trick of over trading/insolvency/no support - a n other purchased the IP and some stock of that product. Some of the original founders of 4eco jumped on the EV charger bandwagon and are currently managing to stay afloat producing the Zappi charger, there's also a PV surplus diverter in their range as well. There's plenty of alternatives - I have a Fronius OhmPilot. https://www.solarpowerportal.co.uk/news/4eco_finds_buyer_with_plans_to_take_the_immersun_international https://www.fronius.com/en/photovoltaics/products/home/solutions/fronius-solution-for-heat-generation/fronius-ohmpilot/fronius-ohmpilot

A very sensible combination - don't forget a Venus device is required.

Maybe they've shifted them, they look fairly equidistant in this image.

https://www.solarquotes.com.au/blog/solar-panel-clamping-zones/

Is the upper clamp in a zone ?

Mine (actually the EM version) is over 30 meters from the Venus device, works fine using the Victron 485 to USB converter, extended using Cat5.

I use these, per circuit logging - it's open so you can DIY. http://www.iotawatt.com

Perhaps I should have mentioned that I'm in Orkney, the Scotish island that self produces 120% of its annual electricity requirements. Entire packs are readily available on the mainland. There are a number of large vehicle breakers here that may well be prepared to quote for shipping, but the legality and logistics of sending a used Li battery, removed for an accident damaged vehicle may well be problematic.

I use quite a few Leaf packs into Victron kit. Like most things with Tesla branding, their ex vehicle batterys are very expensive, and mechanically, and electrically somewhat awkward to reconfigure into nominally 48v packs. Leaf and Volt packs are rather more easy to obtain, and far easier on the wallet.

Running the output of a wind turbine through a charge controller intended for PV use will not be productive simply due to the nature of the way MPPT works. A charge controller designed for WT will allow the user to manually enter the I/V curve data, which may be available from the manufacturer, more often via observation and data gathering.