I got a decent reply from the MPP seller, (via ebay) he agreed that the manual is not clear. He at least bothered to rep,y, and was knowledgeable about the product.
There is no option to turn off utility charge, he explained it as they had issues with batteries being discharged for too long, and so removed the option. I don’t agree with that as surely it’s the users choice , and it’s so easy for them to give the option, but even I offered to pay to have it as a firmware update, it was refused. Seems the powland versions are an exact copy of the mpp units, but powland have no back up at all. We live and learn.
I have disconnected the utility supply , and now only run a well pump on 240vac when ever there is enough charge to work it, not at all what was intended, and very disappointing.
i would have thought that using lithium batteries would take care of the discharged time (overnight etc) , and suggested this, but again no co operation. So, search continues for a better unit, hybrid of min 5kw, if anyone knows, share the detail, Regards to all.