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eyacht avatar image
eyacht asked

Why would I get an "Inverter Overload" error on my Quattro?

Hi everyone - I have five Quattro inverter-chargers on my boat; 4 x 48V and 1 x 12V ... they are all 5KW. The system has been in place for about 6 months and yesterday was the second time the 12V inverter-charger gave an "inverter overload" error. I could understand this if I had the kettle, washing machine, toaster and induction hob on ... but, as with the first time, there was actually very little load on the system. I am running firmware v430 on all of them. Is there any reason for this that I'm not getting? Is there anything I can check that might be causing it?

Thanks in advance.

MultiPlus Quattro Inverter Charger
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Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @eYacht,

You may wish to get a cup of tea and settle into Diagnosing inverter Overload with Johannes Boonstra.

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eyacht avatar image eyacht commented ·

Thanks @Guy Stewart (Victron Community Manager) ... I had a coffee but watched the video :) While interesting, the take-away was still that the unit experienced a large current draw. But as I mentioned, there was only a few hundred watts on the system - nothing started up (or shut down suddenly) - we basically had the stuff that is always on running. The ambient draw of this is about 17 amps at 12V - fridges, lights, computers etc.

The setup is such that I have 2 x 48V / 540ah lithium banks and 1 x 12V / 900ah lithium bank. I usually have one of the 48V banks off and the other on, keeping the 12V bank close to 100% on float mode (I exercise the 12V system about once a month). I'm now wondering if the problem might be in the power coming from the 48V system. Does anything in this give further clues?

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eyacht avatar image eyacht commented ·

Thanks @Guy Stewart (Victron Community Manager) - yes I have the CCGX colour monitor ... I'll check the data log. The machine is about 2m from where I normally sit, although in a cupboard, and I didn't hear any alarm or odd noises. The fan sitting on the desk just stopped, which is how I knew the power was off. I turned it off & on again and all was well. The 48V inverters feed the 12V via a step-down transformer.

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