hindi... pag 1 lang 300 watt panel, hindi pwede sa 12 volts battery/inverter/controller... 300 watt panel ay 24 volts not 12 volts so lahat dapat ay 24 volts.
Mas maganda pag 50 watt or 100 watt panels connected together in parallel... Tapus pag may problema sa isa, it's easy to change... pag isa lang panel, wala na... you need to change it!
a 1000 watt inverter consumes a lot of amperes... for just 1 fan + lights (kahit dagdag mo 1 led tv) 500 watts is enough.
a 30 amp controller is ok pag 2 X 100 Ah batteries and 300 watt panels if it is a PWM controller but hindi kaya sa 2 x 120 Ah batteries. Pag MPPT controller pwede na!
First, and this is important, before you buy anything you need to know:
how many watts is your fan and how many hours you use per day
how many lights and how many watts, how many hours you use per day