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For an off the shelf solution, check out the votronic triple. https://www.amazon.co.uk/Votronic-battery-45-30-350-Triple/dp/B01ES96SZ4 B2B charger MPPT controller AC charger This unit will handle all issues. Even charges vehicle battery.

Thanks for your reply Anton, two more questions before I leave you in peace; which temp thermostatic mixer valve did you go for? I saw the link you posted, but it has 3 choices, I'm leaning towards 20-43C. And do you know how many m's and gauge of underfloor pipe you laid? Many thanks, Good...

Hi Anton, hope you don't mind me getting in touch, how did you get on with your underfloor heating loop? Does it work well? Can I ask whether the pump and mixer valve setup work for you? Someone told me I don't need a pump on my underfloor loop, I would be interested to hear your thoughts on...

I disagree that hydronic is heavy. Do the sums, a 30m underfloor loop with 12mm HEP will contain 1.9 litres of water.. (surprisingly light). Granted you need a bit of 15 & 22m HEP to get the coolant to the inlet / outlet. which weighs marginally more. Also the reason it uses more electricity...

Thanks Joe, appreciate your advice. One detail I need to hammer out is the valve for the floor loop. Obviously I don't want 95c coolant (from the engine) in the underfloor loop... it needs to be a lot less. i am told underfloor valves can regulate the temps accordingly. I'm concerned if I...

Good shout. Do you know what valve you intend to use on the underfloor loop?

The idea behind the whole engine disconnect is In the summer time, when you want to run the D5 to make hot water, you don't also have to heat the engine mass as well!

Ok this is the circuit I have planned for my hydronic install. I would be grateful if those in the know could critique it. Having spent weeks researching hydronic systems, I think this is my final plan. Note my idea is made more complicated by my desire to utilise the vehicle heater matrix as...

This is a plumbing schematic showing the flow with the engine. I think this is pretty much what you have. Im going to follow a smilier setup I think, except I will also have an underfloor loop. EDIT - I believe, there is a mistake in this attached circuit. The vehicle matrix appears to flow...

Joe, In your arrangement, what would happen if the vehicle engine was on, diesel heater off and the valve was closed? Would this by chance shut off heat to your vehicles heater matrix? Just trying to determine if others have configured there system like I am planning! Many thanks Dan

I am just removing a dual top from my crafter... exchanging to hydronic D5. I am in the process of trying to nail out plans for an integrated engine loop with isolating valve (single rather than dual so hopefully I can utilise the vehicle header tank only) single coil calorifier & hopefully...