SolarEdge Auto-Transformer W/ Sunny Island 6048

[jakobw]

Hi all,

First major post here. Have a question for any of you that have experience with SolarEdge systems and specifically their SEAUTO-TX-5000 Auto-Transformer.

I'm needing an Auto-Transformer to go between a single 120V Sunny Island 6048 and a 240V Sunny Boy 6000US. Typically I would look to Midnite or Outback for an auto-transformer but I'm curious if the SEAUTO-TX-5000 would be a drop-in replacement as it's significantly cheaper.

Unfortunately SolarEdge is fairly light on specs and when I asked them about a configuration like this (120V-240V step-up/phase duplication) they simply said they couldn't help or provide insight (I was just looking for a yes or no answer) as it would be a non-warrantied configuration. I figured that would be the case, no fault to them. They are just protecting themselves.

So I'm looking for anyone who has installed or used these on a SolarEdge installation and if there is any reason they couldn't be used on another system or in the configuration I'm looking at. Based on their manual and a couple of YouTube videos (yes, I know), they simply have a 3 wire hookup (120V-0-120V by the looks of it) and a 2 twisted pair from a builtin temp sensor.

Based on what I see/read I think it should drop-in without issue but perhaps I'm missing something. Any insight would be super here. Thanks a bunch.

Here are a couple of relevant PDFs:

https://d3g1qce46u5dao.cloudfront.ne...sheet_na_1.pdf
https://www.solaredge.com/sites/defa...tasheet_na.pdf

 

[marconi]

The problem is the auto-transformer you mentioned has continuous rating of 5kVA whereas the Sunny Boy 6048 has a continuous power output rating of 6kW. Unless there is a way of limiting the output from the SB6048 to 5kVA or less the SEAUTO-TX-5000 is unsuitable. One should design and select equipment to operate by some margin under its maximum rating - operated say at not more than 4kVA for a 5kVA continuously rated Auto TX. You may have to de-rate the transformer to take account of higher ambient temperature in Belize and the ventilation available.