In order to ensure that the system can operate safely in severe weather such as thunderstorm, it is necessary to take lightning protection measures for this system.
There are several main aspects:
(1) Ground is the key to lightning protection, the basic construction of the power distribution room and solar cell matrix construction, select the photoelectric plant near the thick soil, damp site, digging a 2m deep ground pit, using 40 flat steel, add a resistance agent and lead the ground, the lead line using 35MM2 copper core cable, grounding resistance should be less than 1 Ω.
(2) in the vicinity of the distribution room to build a lightning rod, high 15m, ground and distribution room ground connection, with the distribution room ground wire share a ground! (3) solar cell array cable into the distribution room voltage of dc220v, PVC pipe buried, plus lightning protection.
In addition, the support of the battery plate matrix should ensure good grounding, also connected with the distribution room ground.
(4) Grid-connected inverter AC output line using Lightning Protection box level (GRID-connected inverter has AC output Lightning protector)