I agree with you.
I believe most solar companies sell the product... and then it ends. They don't have the engineers and people in the company to explain the usage, upkeep and maintenance of their own products.
With so much competition out there now for the sales of solar components, set-ups and equipment, you would think one of the companies would step forward and say, "Hey, buy our quality product, we know how to use it and we can show you how to maintain it".
Reasonably priced are most companies and equipment but just like any big purchase (a house, a car) if you don't change the oil, change the furnace filter, keep it clean and rust free, you'll lose it and it will lose its quality.