I have 20 new tinned braided bus bars for sale. They are 35mm2 - 25mm wide x 100mm between centers. The hole size is M10. You can save half off ordering new by purchasing three or more of them for $10 each. Shipping by flat rate envelope is included at no additional charge.
Or you can order new...
I am getting ready to replace my Xantrex 458 2000 watt inverter that I had installed last year in order to upgrade my system to 4000 watts so that I can run my air conditioning with it. I will be selling this hardly used Xantrex 458 inverter (with battery temp sensor and remote panel) for $500...
I stumbled on your post looking for information about the quality and satisfaction of the Magnum inverters... so I can't be much help, I'm afraid. I hope you find a solution to your issue, soon.
I really like what you've done, here. It's an ingenious layout - and I'll be happy to mimic what I can.
Looking back - is there anything you might do differently next time?
I'm not eliminating my 12v native system, nor the 12v 2000w inverter. The 24v system I'm installing (4000w) will be in addition to the existing system with the intention of removing it in the future when I sell the RV. The new install will simply be acting like a 30a shore power connection.