Solar controller for rooftop systems with battery storage – first look at the Bluetti SolarX 4K

[Redaktion]

We got our hands on the new Bluetti SolarX 4K solar controller and inverter. Launching on September 22, 2025, the SolarX 4K is designed to handle much higher solar input voltages — up to 500 volts, perfect for larger rooftop systems. It converts that high voltage into levels suitable for battery storage units. We put it to the test to see if it actually delivers.

https://www.notebookcheck.net/Solar-controller-for-rooftop-systems-with-battery-storage-first-look-at-the-Bluetti-SolarX-4K.1132794.0.html