Thanks smoothJoey and mikefitz. To explain further, by ‘fade’ I mean the charge current drops to 25-26 amps/hr which impacts greatly during the winter when very little solar is available. I know that cabling and altinator are up to a second unit, but the only reason so far that looks close is cooling/airflow? The unit is under a seat which is boxed in. The lifepo4 battery is along side it and it shows a temperature of 18 degrees centigrade. The unit does feel hot to the touch so is it possible that it fades due to the unit getting hot? Would mounting it on an aluminium plate help?
As for no need for a diagram to demonstrate two of these units being joined together, I trawled Victron literature and YouTube and found nothing close to satisfy my ineptitude? I’m able to build a Lifepo4 battery, top balance it and capacity test it all courtesy of YouTube, yet I’m still not capable of joining two of these b to b charges in parallel without detailed drawings, pictures and direction.
Any help greatly appreciated.
Mike.