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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
  
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| Electrical power output capabilities for electronic devices |
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Hi all
Does anyone know the maximum electrical output of the lr3 please?
For example, an electric jet wash with an inverter. Or a drill charger etc.
My vehicle is used for event production. So it would be great to use it as a power supply where possible, as to reduce weight and increase independence in the middle of nowhere.
I had a Navara last and got a jet wash with inverter. But it just killed my battery.
I see on this lr3 there’s 2 power outputs on the rear bumper. And I know the cars are very good for people like me. So I’m wondering if anyone has any technical knowledge on utilising the cars capabilities!
Or is it asking too much haha
Tia
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 6th Dec 2020 9:21 pm |
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highlands
Member Since: 11 Jan 2010
Location: NW Highlands
Posts: 5098
 
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The 2 'appliances' are completely different ends of the spectrum.
A normal drill charger will have a negligible load, but the jet washer....
If, say it was a Karcher K2, that's 1400W at 240Vac
Trying to run that from an inverter is likely to have a load of more like 1600W, so over 100A being needed from the alternator.
D3 alternator is IIRC 150A max.
Not sure what the normal load on the alternator is but it isn't insignificant so you may well be struggling not to be taking charge from the batteries when running the washer.
Robbie will probably have a much better idea of it. Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me  )
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| 6th Dec 2020 11:31 pm |
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Harry365
Member Since: 25 Aug 2018
Location: Lincoln
Posts: 373
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I have a 2000 watt inverter used to power everything up to a microwave at about 1600 watts. It runs off two leisure batteries totalling 240ah. As mentioned, the alternator is ~150 amps so 1600w/12v = 133 amps (real world less amps cos 12.4-14.5 volts)
HOWEVER
This is not how you should use your alternator. It not only starvs the main battery of amps, it also creates voltage spikes across the whole (very delicate) system and puts a lot of strain on your alternator, high heat etc. For high watt applications, you should use the leisure batteries first with the engine off, then charge afterwards. Do not use the main battery for high power applications. You'll need a split charge system but bare in mind charging batteries this way means your best battery will only be as good as your worst.
Inverters are also very "noisy", even good ones. You'll want as many clip on chokes as you can get or else you'll be in a losing battle for good radio reception for the rest of your days, not to mention the sound of your alternator relative to your rpm as a high pitched noise through your speakers.
All this being said, consider a generator if your use case allows it. It'll be much cheaper over 2-3 years not only in fuel but alternator ware (though likely fine), main battery replacement and the cost of everything needed for a good alternator setup.
If you must have an inverter, educate yourself, do not cheap out, earth well, choke everything, find a reliable way to independently charge your leisure batteries. Your research is sometimes better off on boat forums than car forums for 1000watt+ stuff
All the above assumes over 1000watts regular use.
Hope that helps.
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| 7th Dec 2020 12:29 am |
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Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1200
 
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Before inverters, you used to be able to get an alternator that you added that provided the power you need.
Haven't a clue if they're still made, or remember the name, but they were fitted to utility companies vehicles that worked in the back of beyond.
Dave 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
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| 7th Dec 2020 7:29 am |
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aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2462
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You should also not use an inverter to charge batteries or anything with a capacitor starting motor such as a pressure washer
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| 7th Dec 2020 7:31 am |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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Hi all thanks for the replies
I’d rather a generator than damage the car. But they take up space and weight. So I’ll look for this commercial alternator or just have everything petrol power tools. Though more expensive
Not a huge requirement would just be convenient
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| 11th Dec 2020 12:11 pm |
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Sydney
Member Since: 11 Aug 2013
Location: St Neots
Posts: 903
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I use Dewalt 18 volt kit. In my van I have a charger that plugs into the accessory socket with space for another if needed. I also carry a mains fed charger that I can use on a hook up if required.
You can get battery powered pressure washers, take Dewalt for example, they do one that runs their 18 volt system.
Lots of other choices are available.
I rarely need to plug into the mains to charge up my batteries, the one running in the back of the van keeps my 5Ah batteries charged up nicely. De-Tango
V8 Brakes
EGRs blanked
Running boards
3 flash indicators and clock on dash
Blingy grille...
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| 11th Dec 2020 3:56 pm |
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Harry365
Member Since: 25 Aug 2018
Location: Lincoln
Posts: 373
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cmb2020 wrote:Hi all thanks for the replies
I’d rather a generator than damage the car. But they take up space and weight. So I’ll look for this commercial alternator or just have everything petrol power tools. Though more expensive
Not a huge requirement would just be convenient
Tbh, a generator takes up no more space than 2 leisure batteries and an inverter. Certainly weighs less.
A decent 2kw generator is gonna cost you about £500 vs 2 leisure batteries, wiring, inverter at somewhere in the region of £400-600 plus possible running costs of a 2.7 V6 on tickover vs 5hp petrol engine.
I know the idea of having a vehicle based solution is nice, but honestly its not worth the effort for commercial use.
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| 11th Dec 2020 8:07 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8157
 
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| Re: Electrical power output capabilities for electronic devices |
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cmb2020 wrote:Hi all
Does anyone know the maximum electrical output of the lr3 please?
For example, an electric jet wash with an inverter. Or a drill charger etc.
My vehicle is used for event production. So it would be great to use it as a power supply where possible, as to reduce weight and increase independence in the middle of nowhere.
I had a Navara last and got a jet wash with inverter. But it just killed my battery.
I see on this lr3 there’s 2 power outputs on the rear bumper. And I know the cars are very good for people like me. So I’m wondering if anyone has any technical knowledge on utilising the cars capabilities!
Or is it asking too much haha
Tia
Yes it is asking to much for any vehicle!
You need one of those things you tow behind, it called a trailer, either to put the generator on or to tow behind, you can comfortably go up to 12kva then. It can when others can't,
It will when others won't,
It goes where others don't.
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| 11th Dec 2020 8:42 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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Thanks for the advice!
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| 19th Dec 2020 11:46 pm |
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