... Insulation: Class H Protection: IP21~IP23Stamford,Leroy somer,TFW for you chose.(3)Controller system1.Standard control panel, including voltmeter, ... ,preheating button, battery voltage gauge, hours running counter for protection and tranfering.2.It can be with ATS ... ATS) uses update technology, which can be automatic control for on-off electricity, remote monitoring, automatic parallel operation,etc ...