There are still quite a few people who use OK4E inverters, I’m one of them by the way ;). Some indicate that there are still more then 10.000 inverters active at the moment!
Thanks to the website http://www.polderpv.nl I’m now the lucky owner of an OK485 datalogger for the OK4E inverters. I have seen the log files that can be created with IQUE OK4Manager ( http://www.ok4manager.com/siteindex.html ) and I am confident I can create a datalogger for jSunnyreports.
More info soon.