• Whilst on with pondering my original electrical installation and doing the below manual-relay-override conversion, I measured the consumption of a few other bits of hardware when in standby state.

    NB, all @24V:

    40A relay = 85mA

    60A relay = 165mA

    18A DC-DC Converter = 280mA

    1800W Inverter = 330mA.

    Leaving this combination of items on standby was something that we sometimes did when out and about and it came as something of a surprise to realise that to do so was 'costing' us 860mA an hour.

    We're normally parked up for about 17hrs per overnighting spot so were effectively giving away 14.62A. One 24hr period would equate to the consumption of 20.64A - and all this without actually using any domestic equipment.

    Put another way, these losses might otherwise run the compressor fridge on a low setting and in moderate ambient temperature. Proper shocker.

    I'm glad I did the measurements. Manufacturers tend to underplay standby / quiescent loads and I confess I had - until recently - pretty much just shrugged the issue off. I'd urge everyone - who hasn't already - to reduce / eradicate these pointless losses - battery performance / longevity can only be improved.

    Incidentally, using extrapolated figures from real-world solar panel use, it would have taken an 80W solar panel from dawn till dusk on a sunny summer day just to offset the 20A loss that my 40A relay / 60A relay / DC-DC / converter / inverter combination would 'steal'. On a sunny winter's day, you'd be looking at 600W of solar array to offset the loss.

Tweaks and fixes are an ongoing part of the project. This series of pages form a blog - of sorts - and is intended to give a flavour of the day-to-day realities of living with the truck as issues crop up and tweaks and fixes progress. Many of the posts eventually end up getting written up properly and included in the main body of the Trip Truck site; so if you think you have read any of the older posts somewhere else, you almost certainly have.

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