My plan is to put a solar panel on my greenhouse to run a 150 W 12 V heater for 20 minutes max and turned on depending the low temperature is detected by a sensor, automation controller and a grow light for winter. My solar will have a Renology 20 A MPPT hooked to a 12 V 50 Ah lead battery. I am concerned about possible damage in case of a lightning strike near the system.
Just wondering if this low power will require grounding to a lightning rod to direct the high current from a lightning strike to ground. In addition I live in canada were thunder is not very often as I live snow for 5 months, but in summer there are some thunderstorm.