Update time again.
Both son and son in law have the identical 85 amp hour Numax leisure batteries. I have swopped them around and they both behave the same way in Son in Laws Transit Connect.
He goes out with a full battery charge in the morning and comes back in the evening with half a charge. I put it on my Numax intelligent charger and read the voltage gauge. He then drives the van home and returns the next day having driven 18 miles. The battery will then about 3/4 full which will get him through the day. It does appear that the flatter the leisure battery is the quicker it will take a charge, but it's charge acceptance seems to diminish as the battery comes more fully charged.
His van also has the lastest Varistream with our usual 5l Shurflo pump and I'm getting the impression that it consumes more current than the older digital and analogue varistreams do.
I'm very tempted to buy a 30amp volt and amp meter combo and test the amp draw on his pump and compare them to the old units we (son & I) have. I will also be able to see what amps his alternator charges his battery at.
Son in Law does run his pump at a slightly higher flow rate than we do, so that could account for his higher power consumption, but I know of a local lad with a 2 man system who only charges his battery every second day and he doesn't have a split charge relay.
Otherwise the only addition to this van has been an inline on/off tap fitted to the supply from the tank to allow the pump to be drained down overnight with this freezing weather.
S.I.L. also finds that this Connect, with the Tddi motor (non comon-rail but with turbo) is very fuel efficient and takes ages for the engine to warm up, so the other day we spent some time thawing pipes to get him going even though he had driven 9 miles here that morning with the heater fully on.
Spruce