Ps4 doesn’t work with car inverter annymore

It could be a bad inverter, but more likely, there might be a few changes in variables - e.g. quality of the contact, temperature, inverter damage, fuse heating, etc.

But more than that, to use a 150W inverter for even just a PS4 is a terrible idea. Your inverter is woefully undersized - the power supply has a rating of about 250W with consumption peaking about 140W of real power. The problem is power factor - the PS4 uses a switch-mode power supply which can have a power factor as low as 0.6. The inverter needs to supply both reactive and real power - so assuming the PS4 is actually consuming 140W of real power, the inverter needs to be rated about 233W at the least.

To try and obtain this much power from a cigarette lighter socket is also problematic - many of these are not wired or fused for a high current as most cars have a 10A/15A fuse for the cigarette lighter, meaning a 120-180W maximum draw from the car. The inverter is not going to be 100% efficient, usually close to 80%, so 96-144W is the maximum you can realistically expect from a cigarette lighter. You're better off wiring in an inverter to your battery with heavy gauge wires if you want to support that much of a power draw.

- Gough

Another factor is whether the inverter has a sine or a modified-sine wave output. Most likely it is a modified-sine and your ps4 power supply may not work as efficiently with a modified-sine as with a sine wave input. I agree that your inverter is undersized and using the cigarette lighter is a bad idea. If you maxed-out the inverter output power at 150W with 12VDC in, the DC input current would need to be 12.5 amps. It's doubtful that you can draw that much from the cigarette lighter adapter. Therefore, the 12VDC to the inverter will be even less input (10.5 to 11.5 VDC perhaps), which makes the inverter try to draw even more input current for a given output power than with 12VDC or more. The inverter has a negative input impedance such that when the input voltage goes up, the input current goes down and vice-versa. Use appropriate sized input wires (both pos and neg) and do not use the car body as a ground wire.

As suggested, slapping on an inverter because you have one handy doesn't necessarily mean it will work.

My daughter refurbished a 1982 camper trailer. After gutting the box, she funded a project to rewire the unit. I discovered much about inverters during the planning phase of the project. Selecting the wrong inverter output will render some commercial devices like televisions and microwave unusable. Select the wrong power rating and you create a frustrating environment.

The final environment is a mix of AC and DC provided through a RV designed converter.

It gets even worse than that. Sometimes, a modified-sine output inverter can even damage your equipment that's plugged into it. BE CAREFUL.

This is not common and about 95% of loads will work on a modified sine inverter, but many will run hotter. The most susceptible to damage are NiCad battery chargers.

It gets even worse than that. Sometimes, a modified-sine output inverter can even damage your equipment that's plugged into it. BE CAREFUL.

This is not common and about 95% of loads will work on a modified sine inverter, but many will run hotter. The most susceptible to damage are NiCad battery chargers.