This is a 13.8 power supply made for ipduh (SV1PDM) with battery capability. It is based on MeanWell 5.5 A power supply suitable for batteries. We have added a voltage & ammeter and low battery protection (it drops the load when the battery drops below 11V when it operates without mains power). The MW power supply does not have low battery protection. It also have a 5V 3A output. The two left binding posts are 13.8 and the two right are 5V. It powers some mikrotik routers, the DSL modem and raspberry pi.