PV String Conundrum--Too many Amps and Volts for combiner box

I currently have four PV strings connected to a combiner box. I have a fifth string that I want to connect. The specs for the combiner box limits string input to 10a/250vdc per string. The new string is 10.82a/273.6vdc. I know I can't connect the string to the combiner. Can I connect the output from the combiner and the new string via a Y-connector to my EG4 6000ex? The combined power would be 25.18amp (14.36amps from existing strings and 10.82 for the new one). The AIO is maxed at 27amps. I assume if I can do this an inline fuse would be needed.

I could replace the combiner box, if that would help, and if someone could point me towards one that would work.

Any suggestions and comments are welcome.

I think I'm going to need to drop one string from the combiner box to make this work. That would bring the amps down to 21.59 but leave my wattage at 5965. Still need some input on using the branch connector to join the combiner output with the last string to feed the inverter. Seems like it should work, assuming I'm not missing some critical piece of information.

Found this Eco-Worthy 6 string combiner.

It has a max of 15amps and 500vdc per string. Using this with all 5 strings at 25.18amps, would I be safe connecting to the EG4 6000ex with the 27amp limit on PV input?

Bump for op.

Have you looked at the midnite solar stuff? I think currentconnected.com sells them.

Also here:

It sounds like you're trying to combine two different voltage PV strings, you cannot do that they must be separate.

Quattrohead said:

It sounds like you're trying to combine two different voltage PV strings, you cannot do that they must be separate.

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Not trying to combine different voltage PV strings. I have four strings with 200watt panels at 279v/3.59a and one of 273.6v/10.82a. Was planning to connect two of the 200watt strings together in parallel and then connecting to combiner. I just bought a larger, more capable combiner with 6 inputs.

If your old combiner box is only rated for 250 V, then it sounds like it’s not appropriate for the original use, much less for adding more strings.

wpns said:

If your old combiner box is only rated for 250 V, then it sounds like it’s not appropriate for the original use, much less for adding more strings.

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Hence another reason I decided to buy a new combiner.