two in one tablet

Thanks for the heads up on that Heanorboy it's little things like that that you forget to ask whenever your making your purchase and cant return it because youve had longer than 14 days to be able to take it back.

All the different psu with different outputs and connectors is a pain. I went to a HP expo in leixlip 6 or 7 years ago where their pitch at that time was they were going to standardise power supplies across all their models, it happened for about 2 years and they were back to different power supplies. Even if they were standardized, there would be problem as most are designed to operate between 13v and 20v so even if they had a usb type power connector, a converter of some sort would be needed get it up from 12v to the required voltage. Like everything, there's not enough demand for companies to invest in mass production...so if you're off ehu a good bit, an inverter seems to be the only way to go

You may need something around 500w but make sure it's a pure sine wave one. Connect it directly to the starter batter and run the engine when charging, especially when moving from one place to another!

if you connect to the cab battery if you start the engine when charging or if you got into the habit of charging with the inverter on and charging when driving it wont have too much of an effect on your batteries. If you do it off the hab batteries then they wont get charged as quickly or the boost from the alternator which the cab battery will get.

no lost me isn't the charger part of the control panel
David

Look I cant help it thick or what :sorry:

What printed on the charger
WIDE RANGE INPUT
100-240v - 1.4A50-60Hz
OUTPUT
5V==2A
12V==3A/15V==3A

Typically laptop batteries are rated at under 5 amp hours. This is approximately the energy consumed to charge it. Compare that to your engine or leisure battery rated at typically 100 plus amp hours. It is unlikely that you would notice any difference to your engine or leisure battery after charging the laptop battery. Provided you start with a charged engine or leisure battery this would be the case even if the engine or leisure battery is not being charged in any way during the time you operate the laptop charger.

For comparison running a 5 watt LED light consumes about 0.5 amp hour for every hour it operates while a 20 watt capsule halogen light consumes close to 2 amp hour for every hour it operates.

Your laptop charger has a maximum output rating of 45 watts (15x3). There will be an inefficiency in the two conversion - from the engine or leisure battery through the invertor and again from the invertor through the laptop charger. If each of the efficiencies are say 80% then the maximum input power to the invertor will be around 70 watts (45/0.8/0.. This is equivalent to approximately 6 amps from your engine or leisure battery. Note that this is the maximum, during charging as the laptop battery becomes more charged the charging current reduces.

The crude rule of thumb for sizing invertors is twice the load, so an invertor of 100 watts would be adequate if you only want to charge the laptop. Personally I would go for minimum of 150/200 watts which gives you a bit of spare capacity if you wanted to charge phones, iPad etc.

Most cigarette lighters have a 15 amp fuse. An invertor rated up to 200 watts would operate from the cigarette lighter. You would need to confirm that the cigarette lighter operates when the engine ignition if OFF. Alternately you may have a permanently powered cigarette lighter in the habitation area, this could also be used provided it has a 15 amp fuse.

In any case ensure that you have a means of switching off or unplugging the invertor as it draws power even if there is nothing connected to its output. Always switch the invertor OFF when not in use.

As has been said before go for a pure sine wave invertor and if you can use the invertor while the engine is running, in which case you will not even know it is there.

If you run the invertor from a cigarette lighter you are looking just at the cost of an invertor, a 200 watt pure sign wave will cost around £100. Make sure that the invertor rating is CONTINUOUS, that is it will deliver 200 watts continuously not for a short time.

If you are thinking of an invertor larger than 200 watts it will need to be permanently installed and hard wired directly to the engine or leisure battery with an isolator switch and in line fuse on the connection between the battery and the invertor. If you can do the install yourself the cabling and isolator switch should cost less than £50, however if you need someone to do the install then you need to add a further £100 say.

Ask the question and you get a great answer.
I think that I will wire in direct to the leisure battery so have added an inverter to my Santa list but think that it maybe something for me to research in the new year
Many thanks :thx:

David

The jury is out on that one David

Personally I would go the whole hog and buy an Ipad!!!

I have a galaxy 10.1 tab A. Alright for basic stuff and occasional use. Wouldn’t compare it to an iPad in any manner though

But I thought that the Chromebook was like my HP was meaning it would only charge via the mains?
Yes I know I could get an inverter but the costs are then rocketing

like this successfully

Ok so what yer got

I thought I replied to this post.

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