I have a “hobby” room in the flat complex I live but unfortunately there is no mains power connection. So I built up a little power isle with 12 Volts 36 Ah AGM lead acid batteries and a 300 Watts DC AC converter. This works for me (an also my streetlight ;- ) but to monitor the actual battery voltage I build bought this little module and put it into a casing. It seem to be very accurate and it can also be adjusted but my voltmeter measured the exact same voltage.
Post time: Jan-25-2017