I thought you were always supposed to have a battery in the circuit to level / smooth the output.
I would still have one anyway, as the electrics on the site can and sometimes do trip. You may then be left in darkness until the site power is restored.
Not having a battery in the loop made my electrics go haywire,the regulator if thats what u call it was trying to find it and, the battery full/empty meter was bouncing from 0 off the scale.As Clever said what if there was a power cut..no lights eh .
On my Lunar there is a big sticker in the battery compartment saying that a battery must be connected when connecting to mains. I don't know if this is simply to stop the battery cables shorting out or if it has something to do with the charging circuit needing a load or something as per Jeff's post above. If in doubt I would not risk it for the price of a cheap leisure battery that will always come in handy for those times when someone trips out the site supply etc.
------------- 'A sure cure for sea-sickness is to sit under a tree'