Irrigation valve, Wifi + Solar. The critical feature is that it is solar powered with battery backup. Unlike just battery-powered, it won't run out of power and hence kill your plants when scheduled watering stops on a hot day. In addition, the Wifi and SmartHome App enables you to set watering schedules from your phone, monitoring battery level, etc. With a potted plant averaging U$50, this solar-wifi valve pays for itself when it saves your plants dying out in hot sun. Do not rely on battery-alone or wired-power valve because when power is out so is the life of each of your plant.

Junction box with connecting MC4 cables. For connecting solar panel to target appliances (e.g., solar regulator, grid-tie inverters)

Prevent sparks/hi-current damage to connected devices, e.g., power inverters Prevent sparks in flammable gaseous environments Prevemt damage from repeated spark/hi-current that degrade expensive devices when connecting battery..