Does anyone know how to tell the difference between the EPEVER 4210N and 4215N? They look identical with the same weight and design. There isn't any marking on the device either to tell them apart.
The solar input voltage rating. The last two digits tells you the rating, roughly. 4210N = 100V, 4215N = 150V. Check the respective manuals for exact voltages under different temperatures.
@gnubie I meant if they were side by side, how can you tell them apart? There is nothing on the device itself to distinguish them apart. I ask is because I bought 4215N and I want to make sure they didn't send me the 4210N by mistake.
