Pitva
Additional:
The Givenergy supplied kit was inverter, dongle, battery (plus fittings), and a cable to connect battery to inverter. I think the cable is 1 to 1.5m long but didn't see it before it was tucked away.
The installer brought meters for grid and solar CT (co-located with the consumer unit); data cable to connect CTs (one cable carries four connections); 240V power cables; external isolator (which is mandated for exterior batteries); RCD/switch for consumer unit; conduit/trunking. I also had an EPS which meant more power cables; RCD/isolator; twin socket box; earth rod.
Getting the dongle to play ball with the WiFi network is the trickiest bit I had to deal with. That dongle radio isn't what I would call 'bright' but a repeater fixed that issue. Givenergy commissioning via chat is better in January than by phone in September last year (I've had two systems).
Good luck with your installation!