Is this enough to flatten a new battery?

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FourWinds Windsport 6.8L V10
Hi.
I have one large engine battery - new at start of 2024.
Three leisure batteries (lead acid) new in 2023.
I know 200W solar on roof is ageing now and not a lot to be gained in winter grey skies. But I have never gone to the RV with a flat battery.

School boy error today as storage site said alarm was going crazy (even though I don't often set it in the double secure compound). I am assuming this was caused by low voltage as battery was unresponsive apart from a little chirp from alarm system trying to send an alert. Got the old Noco out and started first time.

The only things left on usually are WiFi device and the (alarm) /immobiliser.
BUT I did note that I left the Inverter switched on from last visit and that would mean TV was in standby. Is a 1500w inverter enough to flatten the battery over 5 weeks (last time I could get there due to hospitalisation).

I assume yes that is enough drawer in winter ! But wanted to check.
 
The inverter and WiFi will run from the hab batteries. They probably had quite a high Ah energy draw per day.

But they shouldn't have affected the cab battery.
 
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The inverter itself will take power when switched on even with no load. How much varies between different makes I believe. My inverter is wired through an isolator so takes zero current when not being used.
 
A 1500w inverter may use an amp an hour when left on, depending on the model.
 
Inverter will have drained hab battery vehicle life support may well have drained starter battery...do you have hab to cab charging IE battery master ? That would usually top up starter battery

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I just looked up the zero load figures for an 800W inverter (I don’t have figures for 1500W) and that would amount to about 90Ah per week. Over 5 weeks a 1500W inverter flattening your leisure batteries seems like a probability. As oldiesontour said vehicle life support would likely wipe out your engine battery over this period.
 
I just looked up the zero load figures for an 800W inverter (I don’t have figures for 1500W) and that would amount to about 90Ah per week. Over 5 weeks a 1500W inverter flattening your leisure batteries seems like a probability. As oldiesontour said vehicle life support would likely wipe out your engine battery over this period.
I have 2x 2000w psw inverters one draws around 2ah. on standby the other 1/4 ah,the lower one is older and cheepish Chinese no name the higher draw is newish edecoa,they say low standby current of ONLY 25WATT !
didn't matter to me as it's only on when in use....but proves a generalised figure is of little use...I also have a 600w psw standby around 350mah
 
My Victron 1200VA inverter draws about 0.9amps an hour. If you have a battery master that normally charges up the engine battery then that’s probably the reason everything was flat as a pancake. :-(

I make it about 800ah that it would have drawn over that time.

So yes, it’s normal and I hope the batteries charge up okay.
 
How funny went to MH today and I also left the inverter on. It took the battery from 60% to 6% in 2 weeks with a battery master fitted. I had the charge function switched off. Only realised when I logged on early and saw the cab battery was just under 12v
Lesson learned add switching off the inverter to list of things to remember.
 
It's an American RV and the Intellitec Emergency Start system in effect also behaves like a Battery Master which I shall soon be pulling the fuse for when I put my new Lipo in there instead.

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Presumably the limited solar is normally sufficient to keep hab and therefore cab battery full, but the drain on the hab batteries meant all available charge went into the hab to try and compensate, so nothing got diverted into the cab battery.
 
At this time of year roof solar will be producing two thirds of three fifths of s*d all. Better off laying the van on it’s side with the roof facing south.
IMG_0640.webp
 
I have 2x 2000w psw inverters one draws around 2ah. on standby the other 1/4 ah,the lower one is older and cheepish Chinese no name the higher draw is newish edecoa,they say low standby current of ONLY 25WATT !
didn't matter to me as it's only on when in use....but proves a generalised figure is of little use...I also have a 600w psw standby around 350mah
Which Edecoa do you have ?
I have a 1 year old Edecoa 2,000 watt PSW inverter.
I run mine using the remote.
It uses 0.1 amp when on what the manual calls standby, which is really off, and about 1 amp when turned on but not running anything according to the Victron Shunt.
 
It could be that the vehicle battery is flagging but the battery master masks that when it trickle charges it normally from the hab battery in turn being topped up by solar but the inverter drained that supply.
 
Which Edecoa do you have ?
I have a 1 year old Edecoa 2,000 watt PSW inverter.
I run mine using the remote.
It uses 0.1 amp when on what the manual calls standby, which is really off, and about 1 amp when turned on but not running anything according to the Victron Shunt.
Mine is TYPE C PRO 2000W PSW about 6 months old got it silly cheap on an eBay offer £112. now. £170... I've had case off it very well built good sturdy construction works superbly ..only draw back is 2amp + standby but only a few ma if switched off at remote, something I don't use as I have switch and resistor charging..other 2kw now dedicated to 240v fridge freezer (it's been on constantly for the last few weeks trying to lithium's down to 50% for storage

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Mine is TYPE C PRO 2000W PSW about 6 months old got it silly cheap on an eBay offer £112. now. £170... I've had case off it very well built good sturdy construction works superbly ..only draw back is 2amp + standby but only a few ma if switched off at remote, something I don't use as I have switch and resistor charging..other 2kw now dedicated to 240v fridge freezer (it's been on constantly for the last few weeks trying to lithium's down to 50% for storage
I have this one, been running it for 12 months.
Very happy with it.
Biggest draw I put on it is a 1,435 watt air fryer.
The inverter doesn't even get warm running it.
They seem to have a fairly good name.



1000009035.webp
 
I have this one, been running it for 12 months.
Very happy with it.
Biggest draw I put on it is a 1,435 watt air fryer.
The inverter doesn't even get warm running it.
They seem to have a fairly good name.



View attachment 987164
Same as mine couldn't resist at £112 ! Strange yours is so much lower overhead when on but no load ...double checked mine with shunt and clip on meter both around 2amp ...no complaints they do say 25watt regularly used mine 1850 w air fryer
 
Same as mine couldn't resist at £112 ! Strange yours is so much lower overhead when on but no load ...double checked mine with shunt and clip on meter both around 2amp ...no complaints they do say 25watt regularly used mine 1850 w air fryer
Yes I was surprised but I have checked the draw several times in the evening so no solar and the Victron shunt says 0.1 amp.
That is with the inverter turned off on the inverter switch and using the remote to control it.
When I turn the remote on it draws just over 1 amp so on but no load.
Do you use the remote ?
 
The manual says, quote,
"The remote control and inverter are connected in parallel. When one of them is used to control the inverter the other must be kept turned off. Otherwise the inverter cannot be turned off"
 
The manual says, quote,
"The remote control and inverter are connected in parallel. When one of them is used to control the inverter the other must be kept turned off. Otherwise the inverter cannot be turned off"
Mine is switched off by an isolator switch so no draw at all (also resistor charged before being switched on) My fridge freezer (2door) and it's 2000w inverter have been using less than 20ah per 24hrs ..solar off) for the last few weeks ,so the edecoa would be using more with nothing plugged in to it

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Mine is switched off by an isolator switch so no draw at all (also resistor charged before being switched on) My fridge freezer (2door) and it's 2000w inverter have been using less than 20ah per 24hrs ..solar off) for the last few weeks ,so the edecoa would be using more with nothing plugged in to it
So you don't use the remote ?
 
We have friends who had a similar problem bought a new hab battery which pretty soon went flat to quote him " I think we might have an inverter" an intelligent person but not at all tech savvy. I found it under a seat with a remote switch nicely at a height where you could easily catch it by mistake and switch it on . As they don't use it I suggested removing any fuse on the inverter or better tracing the positive feed back and removing the fuse on that. They've had the motorhome a few years!
 
Not really it's only switched on once a day for cooking,so no need ,but it is fitted so could leave switch on and use remote if needed
Just if you use the remote so have the inverter itself turned off and the remote turned off, with no load it draws 0.1 amp as opposed to having the inverter itself turned on but no load it draws over 1 amp.
Off on the inverter and off on the remote the resistors are still kept charged so ready to use.
 
Just if you use the remote so have the inverter itself turned off and the remote turned off, with no load it draws 0.1 amp as opposed to having the inverter itself turned on but no load it draws over 1 amp.
Off on the inverter and off on the remote the resistors are still kept charged so ready to use.
Yes was aware of that but I guess a combination of even 0.1ah can add up if not used for a few days and the habit of turning things off when not in use,my switch is around 6" from the battery so all beyond that is not live .

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Yes was aware of that but I guess a combination of even 0.1ah can add up if not used for a few days and the habit of turning things off when not in use,my switch is around 6" from the battery so all beyond that is not live .
Yes it is 2.4 amps a day 16.8 amps a week but even in winter when my van is not used for 3 or 4 weeks my solar covers it keeping my leisure battery charged.
 
Yes it is 2.4 amps a day 16.8 amps a week but even in winter when my van is not used for 3 or 4 weeks my solar covers it keeping my leisure battery charged.
I have put switching in to allow the solar to charge only the starter battery,so the 2 x 320 lithium's can be isolated at around 50%soc for storage
 
Hi.
I have one large engine battery - new at start of 2024.
Three leisure batteries (lead acid) new in 2023.
I know 200W solar on roof is ageing now and not a lot to be gained in winter grey skies. But I have never gone to the RV with a flat battery.

School boy error today as storage site said alarm was going crazy (even though I don't often set it in the double secure compound). I am assuming this was caused by low voltage as battery was unresponsive apart from a little chirp from alarm system trying to send an alert. Got the old Noco out and started first time.

The only things left on usually are WiFi device and the (alarm) /immobiliser.
BUT I did note that I left the Inverter switched on from last visit and that would mean TV was in standby. Is a 1500w inverter enough to flatten the battery over 5 weeks (last time I could get there due to hospitalisation).

I assume yes that is enough drawer in winter ! But wanted to check.
Yes the inverter is always drawing power when switched on
 
How funny went to MH today and I also left the inverter on. It took the battery from 60% to 6% in 2 weeks with a battery master fitted. I had the charge function switched off. Only realised when I logged on early and saw the cab battery was just under 12v
Lesson learned add switching off the inverter to list of things to remember.
Rookie question here but how do you switch off inverter? We have just put our moho into storage. We removed the leisure battery assuming that would be enough to ensure nothing running but now I'm wondering if that's the correct thing to do? 🫤 We noticed that the hab control panel/hab lights still came on even with leisure battery removed which has made us wonder if we have missed something? Thanks 😊

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