Panels are not enough just to install - they need to be taken care of. At least clean them, not only from snow, but also from dust. The choice of means will depend on the area of the batteries and the economic feasibility of choosing certain forms and means of care. The main thing to understand is that dust on the panel can reduce its efficiency by 7%. Snow, dust, bird droppings will all reduce efficiency. It is also important to choose good panels. For example,
A1Solar Store has an excellent selection of solar panels.