Video showing the different ways to use the outputs on a Multiplus.
yeh yeh the audio is crap...
Note: This is not specific guidance on how to DIY install one of these things - it's to help understand the different ways these things can be configured.
In the UK at least you need G98/99 approval from your DNO before installing any energy storage device.
Part two here:
https://youtu.be/L4Fg92vD608