Truma C3402 (1 Viewer)

[Tom A]

We have a Truma C3402 heater, 2x110 amp batteries and a 100w solar panel.
Hoping to go away for New Year but will be off grid. Don't bother with tv so just running standard stuff.
Do you think we should be ok for power ? Don't want heater to pack in.

 

[Boringfrog]

How many days away? And will you be running it overnight?

 

[Tom A]

Sorry. Should have said. Probably 5 nights and normally don't have heater on overnight but depends on temperatures. Prefer body heat.

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[GJH]

We have a C3402 in our van. Having never had blown air heating previously we were unsure as to how much power it would use when we bought the van 3 and a half years ago. Happily it takes very little. We have not been out at new year but we have been in most months for a weekend and have had no problems.

We have one 85Ah battery and a 80W solar panel so I should have thought you would be OK.

 

[scotjimland]

You have 110ah useful power (50% of total battery capacity)

dived by 5 = 22ah per day , Truma fan uses ?

I'm guessing it's about 1amp.. (you need to check this) .
if you have it on for 18hrs = 18ah .. not much spare capacity out of 22ah for water pump, and lighting.

The unknown is how much solar power you will get form the 100w panel.. .. if it's dull or wet .. zilch ..

without sunshine, my guess is you will run out of power by day 4

suck it and see.. and have a backup plan.. site with EHU, small suitcase generator, or take van out for a run..

 

[GJH]

The unknown is how much solar power you will get form the 100w panel.. .. if it's dull or wet .. zilch ..

I suppose that probably depends on the quality of the solar panel. Ours works (albeit less efficiently, obviously) even in dull and wet weather - as Peterborough Show proved in 2012 We were there from Wednesday to Sunday but could have managed another day.

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[Boringfrog]

I don't suppose your going to be in your van 18hrs a day (not including sleeping). So if have it on when your in and awake i think you'll be ok. Take hot water bottles too.

 

[scotjimland]

The other unknown is how cold it will be at that time of year ..

OP doesn't say where he is going.. but at New Year it can be very cold and he may need the heating running all day to keep the water pipes from freezing.. this also reduces the batteries performance if they are in an unheated locker..

personally, I'd prefer to be on an EHU in winter..

 

[Tom A]

Hopefully going to a mcc rally at Oswestry rugby club. No ehu.

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[mitzimad]

weve got 225 amps and 180 of solar and did five days over new year at uttoxeter and it coped ok similar usage to yours we wasnt in the van most of the day and only run heater when we were awake