I'm not having a go at you with my comment below and while I love the idea of all that redundancy I hate the idea of the loss of space, extra maintenance required and extra immediate and ongoing expense.
I believe its easy enough to come up with acceptable and easy compromises maintaining space, reducing maintenance and saving dollars on systems which in my eyes are mostly non essential.
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As I said in an earlier post, if your 1 water maker died surely you'd still have full water tanks, its not like you'll die of thirst before finding a fix - given that, would it even be an urgent fix?
We have no water maker but have big capacity across 5 tanks
We are also setup to collect rain - over 1.5 tonne of it in the last 48 hours of it
And the tender has a 200 litre bladder which is occasionally used.
Same or different?
I do see some vessels with different arrays so gather that's for some other reason than pure redundancy, though obviously if one dies they have a spare but......radar is very much non essential for us.
In 4.5 years of full time cruising radar has probably had 20 hours of usage and if it died tomorrow it would be replaced, eventually, but no urgency to do so.
Again, same?
Or a smaller one for lighter loads?
I look at our genset as our redundancy to our main power source. Solar
No moving parts, no servicing required, the silent gift that keeps on giving.
Impressive
We have had failures with macerator pumps on sewerage treatment plants and impellors on toilet pumps (we only have 2)
Half an hour and some creative plumbing, all easy access, had us pumping directly over the side for a month (not ideal but well away from civilisation) until we got a replacement.
The main deck toilet we simply bought in a bucket of saltwater to tip a bowl in for flushing.
Upside to this was a noticeable saving in our freshwater supply so continue doing the same today.
After having had a lightening strike on a previous vessel kill off anything with a dollar value of over $20 I avoid excessive electronics where I can, especially as our plan (pre covid) was to be in equatorial waters with higher likelihood of lightning strike.
If I do have them - its all stand alone , not interlinked with backups stored in the Faraday cage (microwave) during storms
There can only be one (said in my best Highlander voice
)
2 joining into one and running through multiple filtration.
One Victron inverter charger soon to be two
But the solar mppt puts out 96 amps so I guess there's charging redundancy
Question: Do you use both and accept 50% charge if one fails or is it unused but available at the flick of a switch if the other dies?
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Same same for lines on ours
The spare AP I got for $400
Same TMQ commercial quality unit we have now taken out of a superyacht for no real reason - its not shiny anymore?
Swapped it out with ours and put the original in the spares locker away from lightning