FWIW, I went through a simiar process with the factory Overland Solar setup. I wanted better data on our solar usage so I could figure out how the factory system was meeting our power needs and whether I needed to consider upgrades. So, first I bought the Bluetooth dongle and installed it in the VE Direct port on the Overland Solar MPPT controller. To do this, you have to uplug the cable to the panel meter, so it goes dark. However, the dongle allows you to connect to the OS mppt controller using the Victron Connect app (it is recognized as a Blue Solar device), which provides greatly enhanced control and monitoring.
It quickly became apparent that I also needed to add a battery monitor to get the kind of information I needed, and the easiest way to do that was with the SmartShunt. After monitoring the system for a few trips, I decided the the factory system was barely adequate for us - especially on very hot days where the refrigerator was running at max, we had both fans running, and we were parked in the shade whenever possible. So, I scheduled a trip to Reno to have KP Pawley install some upgrades. Right about this time, the factory solar panel failed, so it became more urgent. In addition to upgrading the wiring from the truck, he installed a 330W panel and SmartSolar 100/30 mppt controller. Although we didn't upgrade to lithium batteries at this time, I decided to prep for an eventual upgrade by having him install an Orion DC-DC converter/charger so that when our AGM batteries need to be replaced we can just drop in lithium.
Frankly, the thing that had the most impact on all of this was the upgraded wiring from the truck, which enables good charging from the truck while we are driving.