If you decide on a Victron shunt be aware they do 2 ranges, the Smart Shunt which you access via an app on your phone, and the BMV range which has a separate display. I fitted a BMV712 but rarely use the display, preferring to use the phone app. If I was doing it again would go for the Smart Shunt. Fitting the shunt is easy but the display comes with a long data cable so you can fit it quite a way away from the battery, however fitting the display and routing the data cable takes twice as long as fitting the shunt.