car pc surges on ignition start

i have a 93 deville and installed a computer that ment for a house. so basically what i did is ran a invertor from the distro block in my trunk and grounded it on the wheel well . so how i have it done is i turned the invertor on then the pc no problem but this time i turned the ignition it turned the pc and invertor off . is there a way to prevent the pc from turning off if i have the invertor on.

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

Get an inverter that works to a lower voltage (eg, 8 or 9V, maybe 10V depending on your the vehicle's electrical quality, or a proper PC car supply, or a new or bigger battery (more cranking Amps), or consider a dual battery with a battery isolator - popular with PCs & big audio etc to ensure cranking power remains.

I have a red top 800/1000 and I kinda don't want to get a second battery just for that PC seems a bit extreme .i was thinking a battery isolator. So from my knowledge its two positive leads source to device and a trigger wire. You think a relay would help this situation.


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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

I dread to think how you are switching the inverter (unless it has its own On button) - a relay IMO is essential.

Plus having it powered direct from the battery, and with a ground to a substantial body section or the battery - not a flimsy screw or a thin or separate body panel. The chassis or other "frame" is best (or the engine or battery). You are probably suffering an excessive voltage drop.

its not on all the time Nd its a 300 watt intvertor and its grounded to the wheel well as for a relay I will have on eventually. But for now j just use the button on the imvertor

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

Fine, but at max output, it still takes about 30A. It's probably worse than cranking with high beams on.

Check the voltage drop from the inverter's +12V to the battery +12V, and its GND/chassis to battery-.

Yra ur right its idlin at 13.5;and it went to 13.1-13.3

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

13.5 is ok for engine/alternator idling though higher is common. Older alternators or higher loads can cause a lower idling voltage.
The battery should be charging at 13.8 to 14.4V normally, though Optima usually specify higher.


If you mean the inverter voltage with load and no load, then 13.5 means you have the engine on (alternator charging) unless the battery has just been recently recharged, and you have a 0.2-0.4V drop (at normal or full load) which is ok. So if your battery drops to 10.5V when cranking, the inverter gets 10.1 to 10.3V.

True but I did have the headlights on the radio on and I have some amps hooked up. I the car was already on so I just turned the invertor and went for it .I have a built in voltmeter I installed so it was effortless on my part

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

I see an aditional problem here, too...

You have a 300W inverter. I certainly hope your PCs power supply is rated at 250W or less.

PC power supplies are rated on their output power. Output power, times their efficiency, equals input power.

300/85%=345 watts in, if you have a 300 watt computer PSU. You are already overloading your 300 watt inverter by 15%.

What are all of the components in your PC? CPU and graphics card are the biggest power hogs in a modern PC... Did you use a PSU calculator to figure your total PSU needs?

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Yea the PC is very small its about the size of a DVD case and everything on it is USB powered except the PC its self. Here's a link of the specs.

https://www./itm/140665883657?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649


The power plug is rated 19v dc 2.1a

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

they do make pc power supplies that run off 12v properly. then you don't need the inverter. and they aren't even super expensive. many are designed to survive cranking and can handle the power on / power down logic as well.

yea I saw some adapters that fit the back of the PDA and turns into a fig charger. I was gonna take the cig part apart and tap a fuse line however when I ordered a couple the circle tip that goes in the PC didn't fit.I saw those universal ones they sale for PC's and I wasn't about to shell out 80/100 bucks for an adapter set that I was gonna only use two pieces of it .so for now I got the invertor
tll I find a adapter and I thinking of putting a relay on it so I don't have to keep going to my trunk. Do you have a link that has some that will fit my PC

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

Clicky...

Look specifically at the picoPSU-120 ($45.00) or the PST-ITX-3 ($30.00). Either of those should run your PC, based on what you've told me. Me? I like to overbuild everything. I'd choose the 3 over the pico... More power reserves, and NOT run at 90% every time it's powered up...

Depending on the BIOS/motherboard, you might be able to tell it to boot automatically upon re-application of power. Look for AC power settings, in the setup. That'll keep you from having to go to the trunk every time before you start up...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

I actually saw those but that PC is really small it doesn't even have a DVD drive. In less I can do an external connection but I'm a newbie to hardware on PC's I'm a plug n place when it comes to hardware might have to get a specialist on this one

https://www.made-in-china.com/showroom/himediacrt/product-detailteIEdoayrMcs/China-Nettop-PC-K11-2-.html the PC I'm using

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"

You're talking to a specialist! LOL I do it every day! It's my job! :)

Your link didn't work. Give me searchable keywords, (manufacturer, most importantly...) and I'll locate the PC on my own.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

my apologies so that link I posted do you think it will work cuz that PC is compact. After looking at the ones you requsted I might be able to.connect the harness and put one of them in a external shell and go from there

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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"