This is an EasySolar 24/3000 with a BMV700. LPG gas hot water was switched on (DC ignition, about 5A nominal draw) and a low voltage alarm was triggered momentarily. VRM shows a momentary spike down to about 18V (!) on the DC Bus chart only, where the plain Battery Voltage and Current chart doesn't show this. Any ideas - is this just a spurious error? What's the difference between the 'voltage' part of these two charts?