Jeff,
When you answered on the battery post, and were having a go at split relays you forgott to tell ww that when your battery gives out merely starting the engine gets you out of trouble to finish the day. Plus I bet you put one on your van.
Sorry it's been bugging me.
Mods this is on topic because it is about generating for work. 
What I was saying about the split charge relay,is you will be wasting your money if you only do short Jorneys, If you cover a good milage while working the a split charge relay is a good item.
the relay would do better if you had a flat battery, if you gave your van a few more revs instead of leaving it ticking over, like when you use another vehicle to jump start a flat battery.
I wasn't having a go at relays, I'm just trying to stop a guy fitting one if he only does short hops between Jobs, like I my self do.
No I don't have a split charge relay fitted, I don't even use the one in my caravan, I tend to take my battery off every night and charge it independently, a few minutes work for 8 years of use from one battery, I must be doing something right.

hope this answers your question, I don't want to leave anyone bugged, with one of my replies.