The Solaredge "Key" and "Safety & Monitoring Interface" have cut sheets dated 2014 and 2016 - so take their feasibility with a grain of salt - indicate that at some point SE optimized systems could be paired to third party inverters. Based on a quick read it looks like this technology requires optimizers that have "IndOP" built in (independent optimization) and if I was to venture a guess that's not what is on the roof you're looking to work on.
https://www.solaredge.com/uk/products/retrofit/solaredge-key#/ https://www.solaredge.com/products/retrofit/safety-and-monitoring-interface#/ https://www.solaredge.com/products/retrofit/power-optimizer-indop#/
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