Anyone got a Webasto Dualtop RHA102/Evo 8?

Discussion in 'Heating and Air-Conditioning' started by jonandshell, Sep 4, 2016.

  1. jonandshell

    jonandshell Funster

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    We have a Webasto Dualtop RHA100. The boiler has sprung a leak and, since it is £600 for a new one, I am considering an upgrade.
    I have in mind an Evo8 with the 2000w electric element and programmable controller.
    Whilst the unit is phenomenally good running on diesel, has anyone got any experience of running such a unit on EHU and is it any good on the electric only setting?
     
  2. Ivory55

    Ivory55 Funster

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    Hi john, try full timer where he works they fit diesil heaters he might have spares etc or an old one that can be cannibalised.
     
  3. jonandshell

    jonandshell Funster

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    HI Colyn
    Not really interested in repairing the old one. We are going to be full timing ourselves on EHU. No point in burning diesel if we are paying for leccy!
     
  4. John Laidler

    John Laidler Funster

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    Our dual top has a 1 and 2 KW setting and we have found in the UK even the lowest setting adequate at night.
     
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  5. Ivory55

    Ivory55 Funster

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    Full timing as in giving up the fork lifts etc and off touring ?
     
  6. PhilandMena

    PhilandMena Funster

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    Not had mine serviced since new, 5 years ago. Still whisper quite and faultless.
     
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  7. jonandshell

    jonandshell Funster

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    Still at work unfortunately.
    We are embarking on a self build project and will be living on site in the van.
     
  8. jonandshell

    jonandshell Funster

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    Thanks for the heads up DBK.
    Is it possible to heat water effectively on leccy or does it take forever?
     
  9. John Laidler

    John Laidler Funster

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    I forgot to add the programmable controller is correctly described in that you can program it, but it is a long-winded procedure and once done you won't want to alter it! We just turn the temperature up and down as required. :)
     
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  10. John Laidler

    John Laidler Funster

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    No, it's quite quick. We've never timed it but if you were in a hurry giving it a blast with the diesel would be the answer. It is equivalent to something like 8Kw. I could do a trial tomorrow if you want - the van is on the drive filled with water for our now cancelled trip to France.
     
  11. jonandshell

    jonandshell Funster

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    No that's OK. Thanks for the offer though!
    I was concerned that the heat transfer from the element to the boiler would be slow, given that it is simply inserted into the burner unit vanes!
    I will be on the phone tomorrow to a couple of suppliers to get the best price.
    It will be an easy install. The new one will bolt straight in, the hole in the furniture is the same for our manual control and the programmable one and all that needs changing is the wiring harness and adding a 240v supply.
     
  12. jonandshell

    jonandshell Funster

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    Well, this won't be cheap.
    Apparently, Webasto don't allow supply only of the Dualtop because it's too complicated.
    Complicated, my arse! It's a bloody heater and boiler, not rocket science!
    I am awaiting a price from my local dealer. In the meantime, I have isolated the water supply from the unit and it's cold showers only......
     
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  13. BwB

    BwB Funster Life Member

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    Presumed you've tried Heatso for supply? They do a lot of that sort of thing and might be able to source for you.
     
  14. eddievanbitz

    eddievanbitz Trader - Funster

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    Van Bitz were until recently Webasto service agents and we have installed dozens of Dual Top systems

    They work exceptionally well on Diesel, and very well on mains

    We only gave up the servicing as whilst Webasto are a great company to deal with, and their products well engineered, but some of the companies that install their products want shooting.

    This of course leaves the service agents to deal with the customer, and explain that "yes, their trip is cancelled, and no it is not covered under Webasto warranty"

    The biggest fault was the failure to clean out the clear swarf from the water tanks when the pipes were fitted, leaving wormlike spirals of translucent polypropylene to work their way around the system and end up converging in the capillaries and valves within the Dualtop

    Which then has to be removed and rebuilt.

    So excellent kit, when fitted properly

    We have loads of spares in stock if you ever need anything
     
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  15. John Laidler

    John Laidler Funster

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    The control system is quite complicated. Ours started playing up one night so I got the local Webasto agent to look at it. He plugged it in to his laptop and was able to view it's entire life, including error messages etc. But as long as it doesn't require any sort of commissioning I don't see why you can't fit one yourself and if it does you should be able get someone out to do it who has the computer.

    Ours has three 12v supplies, one fused at 5 amps the others 10. If replacing the fuses the smallest goes in first.
     
  16. jonandshell

    jonandshell Funster

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    Agreed.
    Chausson made a pigs ear of the installation of ours.
    Wiring too thin, air intakes in the firing line of spray from the nearside front wheel, etc.
    I have addressed all the issues on ours so a replacement unit is going to be an easy job.
    We will see what that 2 hours is going to cost me!
     
  17. mitzimad

    mitzimad Funster

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    as the electric element is 2kw and the deisel burner 8kw its not going to be as powerfull on electric but i doubt it runs at 8kw much anyway. One thing deisel heaters seem to do well is modulate down to the required load
     
  18. jonandshell

    jonandshell Funster

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    Well, it is now all on and commissioned, courtesy of M A Autocool of Norwich.
    Good efficient service and a very knowledgeable engineer, which is essential for these units.
    Leccy performance seems OK and it is nice to know that we aren't using our diesel when we are paying for EHU.
    The new control is fairly straightforward too. Although it is a shame the timer can't be used for water heating only in summer mode. We aim to try it on winter mode but setting the cabin temperature really low to see if that works.

    We'll see how it goes.
     
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