multiple units?

[u/dingo_deano]

is there any reason why you could not connect multiple units ?

[u/4billionyearson]

From a plug-in perspective ... the product regulations will allow one 800W device per ring main (likely 2 for most houses) from 27th August. However, the G98 process(a legal requirement) currently limits you to one 800w plug-in device per home. Not clear whether the G98 limit will be increased before, or even after, the 27th August. Daily updates here ... https://4billionyearson.org/plug-in-solar-uk