thats called hour meter and its available on pannel board assessories shop ,,,,,,,,,,,,,it runs on 220V AC , no matter from where it gets , either from generator out put or from from wapda line,,,,,,,,,,,,,,its optional , but i suggest you instal it , with out that how will you came to know that its time to change the engine oil,,,,,,,,,,,,,,,,,,,,above reading is 2402 hours and 55 min ,,,,,,,,,,,,,
about KVA,,,,,,,,,,,,you know about power factor and root mean square velicity ? ,,,,,,,,,,,,if no then forget this thing its really not as simple as looks,,,,,,,,,,,,,,any how 3KVA equals to 2.4 KW