Clean power for Devialet

[chrisc]

Mentioned in post # 5, that I fitted a PV powered inverter with 105 a/h gel-type lead-acid batteries back in 2015

The batteries have reached their sell-by date which was evident by a rather short session one night after dark when the AC power went off and the batteries stopped working after 45 mins

Have replaced these with a 28 volt 1200Kw lithium-ion phosphate battery pack.   The inverter's charging characteristic had to be modified to cater for the new batteries' requirements

After letting them settle down for 10 days and charge to 100%, I disconnected the mains from the inverter by means of a Changeover Switch which bypasses both live and neutral

Apart from being able to run the Devialet, sub and computer for 6 hours with only 8% discharged from the battery, I noticed a distinctly lowered noise floor which equates to better definition

The lithium-ion battery costs about 15 times that of the lead-acid equivalent.  It has a 10 year warranty and expected 20 year life, if not frequently discharged beyond 60%