12/24v roof top AC

Hmm, some massaging of the figures going on there.
10000btu is very nearly 3Kw.
Their figures don't stack up.
 
merl said:
Hmm, some massaging of the figures going on there.
10000btu is very nearly 3Kw.
Their figures don't stack up.
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Their figures are about right for the output vs input for invertor a/c, maybe a tad optimistic.
 
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Pudsey Bear said:
No Idea mate, way above my pay grade, maybe comment in the video.
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Nah, the video is sponsored and concentrates on promotion rather than information. It reminds me of those stupid ceramic heater adverts on social media that claim to heat a room using little power because the unit is "super efficient" it's a load of crap.
10000btu ....you'd need 70mm cable to supply the 300A to the unit if that figure was genuine.
Using 12v battery power for heating a MH simply isn't on. Cooling is naturally less effective and efficient than heating so powering cooling from batteries in a MH will be even harder.
Ultimately the laws of physics prevent you from consuming little and getting a lot, you can't defy the laws of physics, it's impossible to get summat for nowt.
Will it cool? Yep.
How much? Not a lot.
 
merl said:
Nah, the video is sponsored and concentrates on promotion rather than information. It reminds me of those stupid ceramic heater adverts on social media that claim to heat a room using little power because the unit is "super efficient" it's a load of crap.
10000btu ....you'd need 70mm cable to supply the 300A to the unit if that figure was genuine.
Using 12v battery power for heating a MH simply isn't on. Cooling is naturally less effective and efficient than heating so powering cooling from batteries in a MH will be even harder.
Ultimately the laws of physics prevent you from consuming little and getting a lot, you can't defy the laws of physics, it's impossible to get summat for nowt.
Will it cool? Yep.
How much? Not a lot.
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Are there any AC units , running off batteries , that would do the job ?
 
Hey guys 😊,
I have to say Motorhome/Caravan AC units in my experience are Loud & Power Hungry.
It’s like parking next to a refrigerator Van or Lorry.
🫣
 
Nesting Zombie said:
Hey guys 😊,
I have to say Motorhome/Caravan AC units in my experience are Loud & Power Hungry.
It’s like parking next to a refrigerator Van or Lorry.
🫣
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Split/umbilical units aren't bad.....

All in one types (like old style through wall types) and portables can be horrendous though...
Compressor/fan noise all blown into the living space.
 
Nesting Zombie said:
TBH If someone pulls in for the night next to where I’m parked, (And it’s ALWAYS next to where I’m parked 🙄) with one running I don’t mind so much,

I just start my Generator 🤷🏻‍♂️👍😊

(Oh come on it’s been a while since we’ve had a dig at Generators)
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Worst are refrigerated trailers with a fridge pack where the diesel engine powering it (used to be lister/petter) but now kubola/Kohler etc etc....

With bearings so clapped that they rattle....

Always fun when you're called to one that's, karked itself and there's a trailer full of pig carcasses gently defrosting...

No pressure then...
 
I keep looking at one of these https://uk.ecoflow.com/products/wave-3-portable-air-conditioner?variant=50942834671955 seems to be a better option, but as much as my finger hovers above the buy button I just aint pressed it.

Perhaps merl will be able to tell me if it will work.

My plan would be to have 2 Wave 2 add on batteries and run the piping outside via the vehicle kit (included)

At a race meeting earlier this summer a motorhome next to us had roof mounted a/c but needed to run a generator to use it, it suddenly died about 1am and wouldn't start in the morning (nowt to do with me btw)
 
6100 btu.... Probably OK in a small well insulated PVC....

I personally wouldn't hold out much hope in a decent motorhome.
 
alcam said:
Are there any AC units , running off batteries , that would do the job ?
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Yep, it'll work but the question really boils down to how well will it work and for how long.
As you well know you can run a lot of stuff for a long time from batteries providing you've got the batteries in the first place and you can recharge those batteries quickly with enough panels or a mains supply. Heating is power hungry and cooling is even hungrier, I guess that cooling has a seasonal advantage in that you'd be getting better solar gain in the summer but you'd need a damn good battery bank and an even better solar bank before you could run it for.long periods. Far easier with a Genny for sure but always at risk of someone pushing a spud up the exhaust pipe😉
 
merl said:
Yep, it'll work but the question really boils down to how well will it work and for how long.
As you well know you can run a lot of stuff for a long time from batteries providing you've got the batteries in the first place and you can recharge those batteries quickly with enough panels or a mains supply. Heating is power hungry and cooling is even hungrier, I guess that cooling has a seasonal advantage in that you'd be getting better solar gain in the summer but you'd need a damn good battery bank and an even better solar bank before you could run it for.long periods. Far easier with a Genny for sure but always at risk of someone pushing a spud up the exhaust pipe😉
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I know people that would pay good money for that
 
The a/c unit in the Adria sounds like a generator and is only mildly effective. I don't think it helps being a combined heater as well.
Wear as little as decently possible and drink cold beer works better.
 
merl said:
Hopefully that one DOES defy the laws of physics. 🤞
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61amps on high..... By the looks and I reckon it'll be running pretty much non stop in anything bigger than a swb...


Screenshot_20250828_152011_Chrome.jpg
 
mistericeman said:
61amps on high..... By the looks and I reckon it'll be running pretty much non stop in anything bigger than a swb...


View attachment 145678
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Yep, like I said Power hungry & Noisey.
My generator is only 58db if fired up straight out of the box.
I’ve got it Muffled & in a built in Sound & Fireproof cabinet. That’s made CONSIDERABLY quieter again.
 
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