Sanity check on power readings from watts247 combiner

[JerkyChew]

I'm in the middle of setting up my off-grid shipping container and would like another set of eyes before I go any further, because my meter readouts are... weird.

Rundown on current equipment:

• Panels: Bluesun bifacial BSM460M-72HBD 460W (up to 575W w bifacial)
  • 50.8 Voc
• Combiner box: Watts247 4-2
• Storage/MPPT etc: Zendure Superbase V6400 station
  • Max solar input: 3kW at 150V

I currently have 4 panels - 2 strings of 2 each in series. The Zendure max DC input is 3kW at 150 Voc and I want to run two series-strings in parallel to one output to max out the solar input, but I'm seeing weirdness with my initial setup.

Using my Klein meter, I'm seeing the following as of about 3 hours ago (Pics attached to make sure I'm doing this right. and ignore those wires in output 2)

• String 1: 75v, 54A
• String 2: 75v, 54A
• Output read at base of combiner: 75v, 53A.

Obviously none of this makes sense, if those amp readings were correct I would have already blown my fuses and be pushing 4kW.

I expected the amperage from each string to be much lower - like around 10A. And I expected the output to be 2x the amperage of each string. Instead everything is identical. My Zendure has just hit 1.5kW input which at least on paper means that all four panels are supplying power. So what gives? What am I doing wrong here? I don't want to add any more panels until I get this piece figured out.

 

[Quattrohead]

You measure amps with the clamp thing on the end, not with the probes

 

[JerkyChew]

Well that would explain it. Thanks for pointing out my, uh, lack of knowledge. I can now confirm that string A amps + string B amps = output cable amps.