For me, the Juntek monitor (#6) is the pick of the bunch. It does everything I want, and a whole lot more besides.
Show battery voltage, current and State Of Charge simultaneously.
Offer Wireless connectivity between shunt unit and readout.
Be well made, really accurate and look good.
This monitor comes in 30 amp, 50 amp, 100 amp, 200 amp and 300 amp versions.
I got the 100 amp model which cost just NZ$40, freight free.
The wireless range is advertised as 10 meters and it certainly works just fine for me at about 4 meters. Wireless operation makes siting the units really easy. All the monitor needs is a 12 volt (or a 5 volt) power supply so can be sited pretty much anywhere at all in the vehicle. If you prefer a cable connection, standard USB micro cables can be utilised.
Basic battery monitor functions are easily set up - just as well, given the poor quality manual. Should you want to add Hi/Lo voltage or current alarms etc, a very good review/user guide can be found at http://evbitz.uk/EVBitz.uk/Other_Stuff. ... 0Guide.pdf
From my perspective, this is a far better unit than "others" costing nearly seven times as much.
https://www.aliexpress.com/item/3302390 ... 7f43f96fec
My "must have" list was quite short - the unit had to :-