I am currently working on the electrics in my campingbus.
It hast 160ah of battery power that i need to acess for work.
I baught the related Inverter to charge a laptop. But I am worried if I calculated everything correctly.
If it we're to produce the 1500 Watts i planned on using 25mm2 diameter cables and a 100amp fuse.
Do you think that is enough or have I miscalculated something.
Sorry for the spelling errors but I am phoneposting from germany.
>1500W inverter
>100A fuse
>Yuro wiring standards I don’t understand
Yeah bro I think you went way overkill for a laptop. That sounds like fat wire, it depends on the length of wire you run but if the inverter is close to the battery itms probably good. Just make sure you start the camper from time to time because your “160Ah” camper batteries don’t mean much if you charge the laptop for a day or two and there’s not enough juice to start the vehicle. Don’t know how those campers work with the starter and a low battery from running accessories.
The little black brick on your laptop charger should have print on it that says how many watts it is.
Charging the Laptop will be what I use it for most.
I went "Overkill" because I wanted the option to run a 1000w electric heater. It would only run for about 1.9 hours before the batteries would be empty but i wanted to make sure so I dont risk a cable melting or anything.
NTA, but why not go with a diesel, paraffin or an LPG/CNG heater? Would probably be far more efficient than having to waste your entire battery on heating up your bus. Plus they can run on no electricity if you go with a simple heater with no automatic control.
>electric heater
Get a diesel heater, you know the one actually made to heat trucks and buses?
also doing a van right now, i got one of these from aliexpress for $75. Don't pay any more than that for one or you're just feeding a dropshipper.
Shit arrived in a week, vevor is the brand.
my kit is just a tiny bit different than this one, digital thermostat with a remote but a weaker fuel line. it's still a much better buy because you can get an upgraded fuel line on Amazon for $10 with accessories.
Just get a laptop car charger. It doesn't make sense to use an inverter for that.
based kraut over engineering a simple diy project
Black person what the FRICK are you doing
to run my laptop in the car I just cut off a charging cord from a broken power brick and wired it directly to a cig lighter plug and plugged the mofo in there.
it's only like 12-14 volts versus the 19 it's supposed to have, so it doesn't charge, but it does power the laptop just fine if I take the battery out.
why do disgusting germans have to mention their shithole country at every opportunity? Black person no one cares if you're from germany. holy shit.
>buys a 1500 WATT inverter to charge his laptop that probably uses 15 watts
Kek enjoy wasting 90% of your battery just to power the inverter by itself.
I'm deeply confused.
Why not:
>Start vehicle
>Run heater
Or is your engine huge and inefficient?
I have a tiny 660cc car that runs my house off a 100 and a 500 watt inverter when the power is out. That's enough to run:
Led lighting throughout the house
Water heater igniter
Gas oven (kludge heater)
Internet router
40 inch TV
Gaming laptop
And maybe 500cc of gas per hour. Car engines are so much more efficiant, reliable, quiet, and powerful than generators.
>Why not:
because he's a german moron who purchased a 1500w inverter to power a 35W load and now has no idea to set it up. many such cases.
especially moronic when he could literally just hook the battery straight up to a buck converter to 19volts and be done with it.
>It would only run for about 1.9 hours
don't forget the losses from lead acid batteries due to high C discharge, probably more like 1hr.
this is a great product to charge the battery from alternator and solar
https://www.renogy.com/dcc50s-12v-50a-dc-dc-on-board-battery-charger-with-mppt/
More importantly standard car lead acid is only rated to be discharged to 80%, while deep discharge ones can go down only to 50%, if you go beyond those repeatedly it you can throw it in the trash.
IIRC completely discharging a car battery means it'll last only around 50 cycles
Lithium is the future (for now), and at current market rates is CHEAPER than lead if you include cycle count. Don't forget the 20-30% discharge efficiency boost.
I think you have that backwards. Flooded lead-acid is 50% DoD, and Deep cycle is 80% and requires higher float voltages.
If you realy want to use 1500w your fuse is too low. W/V=A =125A cable size could work for short runs
1500W/12V = 125A peak current in theory, so that's the fuse you should be getting. The wiring should be 35mm2. The fuse has to have a high current break rating, the cheapest one you can get is probably an NH0 Gg fuse.
Unless you have lithium batteries, you shouldn't be discharging all the 160Ah from it, at most half, so 80Ah. Lead-acid doesn't like being discharged more than that. Heat with diesel, like others said.
Thank you, this helps to reassure my calculations.
I will install the diesel heater tomorrow but am not looking forward to it because I have to find a way to install the fuel hoses without drilling more than two holes into the cars chassee.
Next step is to heat an oven that I want take on my travels. But even if its a high standard one i will never get 6 million cookies in such a short time.
Don't worry, mathematically it's not possible to bake 6 million cookies on a 160Ah car battery in ~5 years
I sort of want to do this but for camping out of the trunk of my toyota camry
You're converting 12/24v dc power to AC then back to DC using the laptop brick with all the losses to go with. All you need is a converter to turn your battery power into ~19vdc and the same plug as your laptop. It's even easier if you have a USB-C laptop because then you can use a cig socket plug. Your laptop power brick will tell you the correct voltage
The car charger is a meme most are max 90w so my laptop is175w direct DC won't work either it will know it's not his charger.
I tried not op btw
Cig socket maybe, but you can get a converter to up the voltage off amazon for $20, something like amazon com/uxcell-Converter-Regulator-Transformer-Waterproof/dp/B01MQJ4IJJ/
Run a bit of wire and find the correct plug for your laptop and you're fine. You can connect these to a battery with anderson plugs or however you like. DC direct can be done. Also 100w will generally work for a laptop it just wont sustain it at full power. Leave it plugged in when you're not using it and it will fill back up.
Es gibt Zigarettenanzünder auf Laptopstecker du Dödel. Pass nur auf dass es der richtige Stecker ist, Laptops haben alle eine andere Spannung, die weicht unter Herstellern ab und sind zwischen 12 bis 24v.
Im allerbesten Fall ist es ein neuer Laptop auf USB-C Basis, da brauchst Du nur ein USB-C DC/DC Netzteil (einfach einen USB-C PD Zigarettenanzünder auseinander Frimeln und die Leitungen korrekt verbinden wenn es nicht aus dem Zigarettenstecker direkt kommen soll) und ein USB-C Kabel.
Und alles auf dein Risiko, nicht mein Problem wenn du die Verkabelung verbockst und dir die Bude um die ohren fliegt lmao.
I'm currently using a Ryobi drill battery to roll my window up and down. I just flip it around and reverse the polarity depending on whether I need it to roll up or down
You're converting DC to AC then converting it back to DC, that is extremely inefficient. You just need something that steps the DC 12v up to the DC voltage that the laptop uses. There's a good deal of info about doing this here: https://www.quora.com/How-can-I-use-a-12-volt-car-battery-to-power-my-laptop-without-an-inverter