Will a 120 watt inverter supply enough power for my gaming laptop?
Will a 120 watt inverter supply enough power for my gaming laptop?
I own a vehicle that accommodates an inverter up to 120 watts, so I installed a 120 watt power inverter to guarantee the fuse remains intact during peak gaming loads. My laptop’s power supply is rated at 240 watts, which is more than sufficient for normal operation. When idle or browsing, power draw stays between 50 and 100 watts. However, once the game starts and the GPU activates, power consumption jumps to around 200 watts.
Will the fuse in the car trip, or will the laptop detect insufficient power from the inverter and switch to battery backup? I’m curious about this without risking any damage, and I don’t want to rely on forum opinions. Haha, sorry if this is the wrong subforum!
The battery will begin to lose power. It's not about the laptop remembering anything; it always operates using the battery. When incoming power decreases, the device will shut down.
So exactly what you wanted to happen. I'm curious, will it still charge at 120 watts and take the rest from the battery, or will it switch on because the power demand is too high for the available reserve?
If the inverter includes overload protection, it probably just reduces the charging speed. But honestly, if you're using 100w and only getting 20w, it would mean charging much slower—about 12 times longer than a full charge, which is probably not practical. The only real benefit would be during long trips or breaks, like gaming and then charging for hours between stops.
The concept was to run my car at full power while gaming, but I found online advice suggesting that drawing power from the 12v/120watt cigarette lighter outlet could damage the fuse or drain the battery, even with the alternator on. I was planning to use a 300 watt inverter for my 240 watt laptop power supply. I realize I can only draw up to 120 watts, so I should opt for a 120 watt inverter. Now I’m starting to think that even if the car runs, it won’t last long—my best option would be to take breaks and let it charge occasionally (probably a few hours).
I mean, car alternator and engine sizes are slipping out of the main topic here, but I’m assuming it’s just a small car or one with an older alternator that can handle a 120w accessory. (Older halogen vehicles with LEDs can use more power overall, but that’s another story)
Idling might not be enough to keep your battery topped up if the laptop uses full power all the time, so I wouldn’t leave yourself stranded...
The 10A fuse on your socket exists to ensure there’s still power for the lights and dashboard, and it prevents the cable from overheating or burning out. You can change it if needed, but some people thought 10A was a safe choice.
TLDR You’ll just need to drive less or be more active.
Or place a bigger inverter straight into the battery, instead of relying on the power outlet.
It's a brand new 2022 Corolla with around 10,000 miles from its first lease, purchased by someone looking to upgrade after two years. I'm worried about electronic issues while playing Halo during lunch, so should I opt for a Steam Deck instead? Hahaha
That really opened up a lot of trouble. I used to do that for 1500 watts on a sound system and the headlights would get too bright when the music was playing, and one day the gas pedal just went all the way down and it never drove again. I don’t know why. Haha.
I understand, I didn't assume you lacked expertise because the question didn't involve running a new inverter directly through the battery. If you had suitable thicker cables and upgraded the fuse, it would simplify things a bit and avoid some of the older design issues. Compared to using a laptop with a larger inverter for an extended period, it would be more efficient. The voltage of your laptop is likely around 19.5 volts or higher.