Aircon for habitation

[Mr porky]

We have just added lithium battery's to our motorhome as our gel battery's died.
Does aircon added to the roof only work whilst on hookup or can you do a bit of aircon whilst freedom camping.
Thoughts please.

 

[daveclare]

Are you not mixing amps at 12v and amps at 240v ? Truma’s 4 amps would be 80 at 12v on full wack.

Ooh! School of life time. Thanks for the suggestion. We're staying in a villa at the moment, so I'm going to go and try that and get back with the result.

 

[daveclare]

Update. Temp is showing 26 in and 24 out. Here are some screen prints with it on low and high.

I was getting confused between 240 and 12. Thanks for pointing it out. My hard facts will be edited

 

[EuroTrotters]

Ooh! School of life time. Thanks for the suggestion. We're staying in a villa at the moment, so I'm going to go and try that and get back with the result.

Yes, it is 4amps @ 240v

 

[Ditcha]

We run our Truma Aventa compact plus from the batteries, when just using vent it uses about 5amps depending on fan speed and about 45amps when the compressor kicks in for cooling. Mainly use it in spells when cooling rather than on constant.

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[Orion]

We run our Truma Aventa compact plus from the batteries, when just using vent it uses about 5amps depending on fan speed and about 45amps when the compressor kicks in for cooling. Mainly use it in spells when cooling rather than on constant.

Thanks for that information, it’s very helpful.

We too have Truma Aventa but the Comfort model which we have only used in anger in Athens last week when on EHU. The spec sheet quotes 4.2 amp consumption for cooling, and a start-up current of 28 amp (150 m/s), which I presume is the figure for 230/240v and the compressor running?

We’ve found that just having the lower ventilation operating with the manual roof vents open is often enough to give a good level of comfort, but I want to explore running the Aventa from inverter/batteries only in vent mode (not full A/C) to make it even better.

Factors to consider are:
We have 340w of very efficient solar and MPPT
Will have 300amp of lithium (currently 200amp AGM which even so appear to be working very well).
Will only be operating the Aventa in vent mode for brief periods and in sunnier climes when plenty of solar would be expected for recovery.

To the experts out there what’s the verdict, doable? And if so what size inverter would be required?

 

[daveclare]

The Aventa comfort is 2400w. We have a Renogy 3000w inverter. We've been using ours in France for the last three weeks without problem. It's been used at all power levels.

 

[BillandHelen]

Without looking at interior/exterior of the vehicle we couldn’t guarantee it would fit space wise, the battery would happily cope with the air con through an inverter

Don’t think you’d have any issues, set to 22 degrees and no3 fan, ours only draws 10amps, could run it for hours!

 

[Neilfg]

Not a particular fan of EcoFlow marketing, but would a https://www.ecoflow.com/uk/wave-2-portable-air-conditioner be suitable runs from a 12v battery and less likely to run your own down too much.

We have the MaxxAir, excellent (quiet at night and controllable) but am now getting interested an AC unit, having seen the Truma Aventa Comforts in vans recently