Am having a battery SOC issue with the Cerbo GX on my new canal boat. Boat company saying they are going to look at it. But would like to try and work it out as well. Starting at 100% (Multiplus showing Float) SOC falls steadily 1% at a time at a rate one would expect with what electrical items are being used. I have seen it go as low as 73%. When we moor up and switch off engine, SOC shoots up to 100% within minutes with just 1800W solar panels. Same happens when generator (FP 48v/15.6kw inverter) is turned on. We know this is not a correct reading. We have lost power twice when SOC showed over 90%. We know the battery bank has emptied because it has slowly dwindeld over 20-30 minutes, not sudden loss, and the voltage which should be >48V has gone as low as 41v. questions: 1. how can this reading be corrected 2. is there another way knowing amount of Ah available in batteries 3. When the generator is on why do the Bulk, Float and Absorption lights not illuminate on MultiPlus Inverter/Charger?