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What size calorifier do you have?

I think 10 litres from 15-80 deg C was 49 minutes using 1kw. The surecal units have a thermostat on them mixing hot and cold water. So the hotter the water in the tank, the more water you will get at your desired temperature.

It looks double pole switching to me. The batteries look like they should take a kicking. https://bloglocation.com/art/water-heating-calculator-for-time-energy-power

Yes I'd guess around that number and about 100 amps at 12 volts, though with a load like that I'd bet the volts will be below 12. How big is your battery bank? Also what type. Big discharges from a lead acid won't do it any favours.

Yes, that's the sort of thing I have. Mines got a neon too. (I like wally lights) My inverter is not big enough to run mine, despite me changing the element to 750 watts. It's connected to the consumer unit with it's own fuse. So only powered by hook up or genny.

Mine is switched with a domestic emersion double pole switch. I've tried to keep it simple just in case the worst happens. As you have been using yours for a while, I'd be tempted to drain it and remove the element to make sure all is good inside.

Murky’s turbo is 30 years old and still good.

https://www.easycomposites.co.uk/#!/vacuum-equipment-and-supplies/vacuum-bagging-consumables/vacuum-bagging-gum-tape.html This is what I used around the inside of the flange and then a flexible PU mastic from Soudal around the outer edge and screws.

I never really trust any product with a funky name. If it was any good it be in use in industry. Remember when bigger money is involved the products have to work or you could find yourself in court.

This is why I try to avoid normal timber and ply at all costs. I've reinforced Betty with Buffalo Board. I have a piece I've been using for a few years in the garden as a kneeling board for weeding. Not a trace of rotting...

That was the good thing about where I used to live in Wiltshire. It didn’t take long for any thing in the water to be coated in chalk.

They get fancier too. https://www.ebay.co.uk/itm/500mm-Boat-Marine-Tank-Level-Sender-Car-Truck-Waste-Water-Fuel-Gauge-Sensor-/292665054371?hash=item44243254a3

Yes, that's the type of sensor I was planning on using in Betty. Good price.

The first shots of it looked like it was a previous race car transporter. It used to be very common to cut the back out of a coach. You used to be able to drive them on a car licence, but that got stopped in the 80's and they fell out of favour. With Murky we are 8 metres and do feel it's...

Last weeks update a little late as I forgot the pictures. Windows refitted and the new aluminium panel. Still needs backfilling and the trim fitting. Once done a mould can be made before I cut the new door opening. So it rained and water still pored in. :( It seems there is some bonding...

Just remember electricity travels a little slower than the speed of light. So the closer you are to the rcd, the quicker you’re disconnected.

Who's doing the best prices on these at the moment?

Thank you so much for your efforts Dave, I'm sure you had better things to do than explore my silly questions. :)

At a previous works building I was being electrocuted on a regular basis. The house on the site was powered from the same meter as me. The house was not earthed nor was my building. The house electric cooker developed a fault and made the earth live. Hence me getting jolts. When I showed them...

Please children don't try this at home :)