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When I fitted a new battery bank last year I also made a small panel with a volt and am meter and fitted into the boats engine panel. For some reason though I wasn't getting correct readings and basically gave up on them. Decided though to take another look this morning. The volt meter requires an independent 12v supply so I have a wee 12v battery I charged up last week for that. the amp meter the last time I tried wouldn't 0.00 Anyway today I checked through everything again. I then realised there's an adjusting screw in the back of the Volts unit. Also The sensor wires to the battery terminal were pretty thin so thought I might change it. I then realised that the Sterling battery charger is right next to the amp & volt meter. As we cc there's little chance of getting mains leccy to charge the BB, so I removed the 2 heavier cables from the charger and made a small wood terminal block with 2 x 5mm posts. The wires from the volt meter then go to those terminals for the volts reading. I have 2 multi testers so took readings and got the volt meter reading spot on. We've been relying on a gauge but it just isn't the same so hopefully we can monitor more efficiently. We also sorted the amps and zeroed it in. with everything disconnected. We then switched various appliances on. We're quite surprised how little the inverter uses on standby, just 0.3 amps. We thought this was too low and thought something was wrong. However on switching on other equipment together and individually it was all adding up ok and very accurately, so we can only assume it's right. What's even more surprising is that with just the fridge and inverter running total draw reads 1 amp and that's with the fridge on coldest setting. Maybe this is why we have so much power, there was no sun at all all day yesterday, we've used energy as usual and batteries haven't gone below half. Bit of sun this morning but mainly overcast but bright, batteries nearing full already. Is the solar energy entering the battery bank having an effect on the amps reading though. Comments welcome please.