Photovoltaic Solar Panel Module 18 Volts 400x350x17mm Monocrystalline Silicon 20 W, Voc=22, Vmp=18 V, Imp=1 A, Isc=1.18 A In Aluminium Frame With Junction Box.
I installed solar in our house recently, then I bought 4 of these:
Modular Contactor 25 A 230 Vac 2 No Co Jvc2 20 25 A and connected them with Ajax Wall Switches. Now I control 3 geysers and the swimming pool pump from my phone. Easy