SUWD - Jun 2, 2014 at approx. 1550 hrs. When the IP uploading data from tool in the unit cabin on top deck, IP observed the battery almost run out, then IP asked W/L Opt. to start platform generator in order to use power from generator instead of solar power. While IP was attempting to switch off solar electrical junction box by reaching his left hand to switch off solar electrical junction box suddenly the junction box exploded as a result of the IP was severe injured on his face, left arm and upper body. IP was transferred to Platong LQ clinic at 1630 hrs. for further treatment and then transferred to hospital on Jun 3, 2014 in the morning.