{
                        module: "MMM-Pinfo",
                        position: "middle_center",
                        config: {
                          debug: false,
                          refresh: 5000,
                          itemAlign: "left",
                          labelAlign: "left",
 valueAlign: "right",
labelSize: 400,
containerSize: 500,
                          DEVICE: {
                                labelModel: "Model",
                                displayModel: true,
                                orderModel: 1,
                                labelSerial: "Serial",
                                displaySerial: true,
                                orderSerial: 2
                          },
                          OS: {
                                labelOs: "OS",
                                displayOs: true,
                                orderOs: 3
                          },
                          NETWORK: {
                                labelType: "NET Type",
                                displayType: true,
                                orderType: 4,
                                labelIPv4: "IPv4",
                                displayIPv4: true,
                                orderIPv4: 5,
                                labelIPv6: "IPv6",
I deleted these 2 lines and then changed orderMac: 6  and so on down the 
List.. 
DISPLAYIPV6: FALSE,
ORDERIPV6: 6,
                                labelMac: "MAC",
                                displayMac: true,
                                orderMac: 7
                          },
                          RAM: {
                                labelRam: "RAM",
                                displayRam: true,
                                orderRam: 8
                          },
                          STORAGE: {
                                labelStorage: "Storage",
                                displayStorage: true,
                                orderStorage: 9,
                          },
                          CPU: {
                                labelType: "CPU Type",
                                displayType: true,
                                orderType: 10,
                                labelUsage: "CPU Usage",
                                displayUsage: true,
                                orderUsage: 11,
                                labelTemp: "CPU Temp",
                                displayTemp: true,
                                orderTemp: 12
                          },
                          UPTIME: {
                                labelUptime: "Uptime",
                                displayUptime: true,
                                orderUptime: 13
                          },
                          WARNING: {
                                enable: true,
                                interval: 1000 * 60 * 5,
                                check: {
                                  CPU_TEMP: 65,
                                  CPU_USAGE: 75,
                                  RAM_USED: 80,
                                  STORAGE_USED: 80
                                }
                          },
                        }
                },				  

Here is what I have in my config.js and custom.css

                {
                        module: "MMM-Pinfo",
                        position: "middle_center",
                        config: {
                          debug: false,
                          refresh: 10000,
                          itemAlign: "left",
                          labelAlign: "left",
                          valueAlign: "right",
                          labelSize: "60px", //null,
                          containerSize: "180px",
                         DEVICE: {
                                labelModel: "Model:",
                                displayModel: true,
                                orderModel: 1,
                          },
                         OS: {
                                labelOs: "OS:",
                                displayOs: true,
                                orderOs: 2
                          },
                         NETWORK: {
                                labelType: "NET Type:",
                                displayType: true,
                                orderType: 3,
                                labelIPv4: "IPv4:",
                                displayIPv4: true,
                                orderIPv4: 4,
                                labelMac: "MAC:",
                                displayMac: true,
                                orderMac: 5
                          },
                         RAM: {
                                labelRam: "RAM:",
                                displayRam: true,
                                orderRam: 6
                          },
                         STORAGE: {
                                labelStorage: "Storage:",
                                displayStorage: true,
                                orderStorage: 7,
                          },
                         CPU: {
                                labelType: "CPU Type:",
                                displayType: true,
                                orderType: 8,
                                labelUsage: "CPU Usage:",
                                displayUsage: true,
                                orderUsage: 9,
                                labelTemp: "CPU Temp:",
                                displayTemp: true,
                                orderTemp: 10
                          },
                         UPTIME: {
                                  labelUptime: "Uptime:",
                                  displayUptime: true,
                                  orderUptime: 11
                                },
                         }
                },

CUSTOM.CSS ##########

.Pinfo {
        font-size: 50px;
        line-height: 55px;
}

And this is what I get

@rkorell
I tried changing the left to right and the size of the container from 80 to 1800 with absolutely no change.

I made a test config.js so I could only have it on screen to test with.
Doesn’t seem to matter what I change in the config.js It stays the same .
I remove the lines from my custom.css and it is still the same only very small on my screen… 42" TV… The really weird part is it looks fine on my pi w2

If I‘m not going wrong and remember correctly, I had a similar problem with MMM-Pinfo.
There is a configuration option in the module-declaration in config.js.
I‘ve set containerSize to 180.
And valueAlign to right.

This solved the shown overlayed look …

And your labels are aligned „center“ - this I would set to left (labelAlign is the parameter)

HTH,
Warm regards,
Ralf