Gaming computer in Truck

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blaircroft

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Aug 1, 2008
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Hello I'm trying to set up my gaming computer in my 2018 Kenworth T680 but having power issues. Both with the monitor and the tower. But mostly the monitor. I realize the power inverter is likely incompatible with monitor and tower PSU. I need a workaround.

Issue: Monitor works interminitly for short periods of time then goes into sleep mode. Sometimes says "No Input" when it it hooked up properly.

Tower works but interminitly restarts. Sometimes I get the error "Please power down and connect the PCIe power cables for this graphics card". But all power cables are secured in the proper places. Tower+ monitor works no problem connected to a wall socket.


My PSU specs are:
Monitor: Acer LCD 22" wide-screen model# G235H power rating 100-240V 50/60Hz 1.5A

PSU: Corsair AX850 model# CMPSU-850AX 100-240V

Inverter: Tundra M1500 12 VDC 120 VAC-1500W

Its possible I have too many things hooked up to the inverter but I've tried it with just monitor and tower hooked up with these results. I realize the monitor and tower PSU are probably incompatible with the inverter so I'm asking for ideas or workarounds to get my gaming rid working with no issues. Thank you.


 
Solution
Eximo
Not so much a difference in voltage. It is how they approximate an AC sine wave. Modified Sine Wave is essentially a rapid on off boosted DC voltage at roughly 60hz, so a large square wave going from 169+ to 169- (roughly) with a zero point in the middle that can last a good while.

A "true" sine wave produces DC pulses that, when you take the root mean square of the entire wave form, equals the same value that you would find on an AC sine wave. So essentially shorter pulses that lead up the curves the of the sine wave, full on at the peak, and then tapering off on the backside of the wave. That prevents the circuitry that has low voltage protection from tripping. (Also how variable speed AC motors are usually driven)

The low voltage...
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Eximo

Eximo

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I'm afraid you will need a more expensive inverter. That looks to be a modified sine wave model. You want a true/pure sine wave inverter to properly power sensitive electronics.

Oddly the fine power supply you have is sort of backfiring here. Probably tripping through the low voltage protection every time the inverter cycles. I'm a bit surprised by the monitor.

https://www.amazon.com/Tiger-1500W-Power-Inverter-DC-AC/dp/B008JGE8LE
https://www.amazon.com/AIMS-Power-1500-Watt-Inverter/dp/B000R2DT2M

I've not personally owned any of these, so no idea if they really work.

A cheaper option might be looking for used enterprise rack mount UPS on Ebay. Not sure how easy that would be to fit in your truck though.
 
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blaircroft

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Aug 1, 2008
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Thank you Eximo for the prompt reply. I suspected I would have to replace the inverter and I intended to replace the monitor anyway with a 27' 1080p LCD Tv. I have read that computer monitors have issues with inverters due to the difference in voltage. You think replacing the inverter would solve this issue? My tower has continuous power until as you have said is tripped due to the inverter low voltage protection cycles? Money isn't an issue I just want to set up my gaming rig without issue. Thank you.
 
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Eximo

Eximo

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Not so much a difference in voltage. It is how they approximate an AC sine wave. Modified Sine Wave is essentially a rapid on off boosted DC voltage at roughly 60hz, so a large square wave going from 169+ to 169- (roughly) with a zero point in the middle that can last a good while.

A "true" sine wave produces DC pulses that, when you take the root mean square of the entire wave form, equals the same value that you would find on an AC sine wave. So essentially shorter pulses that lead up the curves the of the sine wave, full on at the peak, and then tapering off on the backside of the wave. That prevents the circuitry that has low voltage protection from tripping. (Also how variable speed AC motors are usually driven)

The low voltage protection is in your devices, not the inverter. Basically the inverter goes low long enough for the capacitors in the devices to take enough of a dive to trigger low voltage and trigger a power down. This is likely to prevent unwanted operating conditions. Would be odd to have the low voltage circuits working and the high power backlight shut off on a monitor. On a computer it just means more work for the VRMs to produce the low voltages the chips run off of, at a certain point it would lead to overheating, or be completely out of range.
 
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