You should never feel pressured to buy something, especially an expensive solar energy system. These types of salespeople are pretty common in this industry. You can tell them you'll be back later, and they should be fine with it. If they are persistent about making a deal now, tell them that the deal should be just as good in the future. Making decisions under pressure can be more costly later on.
Keeping your solar panels clean is essential to getting the most out of them. Dirty panels will not absorb the solar rays as well as clean panels will. It seems to be common sense to keep them clean, but many people assume that the rain will clean them. But they still need a thorough cleaning to keep them in optimum condition.
This is how to build a Water Ram water pump from easy to find parts at any local hardware store. The Water Ram can pump water uphill hundreds of feet higher …
Cleaning your solar panels does not need to be labor intensive. You want to avoid abrasive soaps at all costs, as they can deteriorate and even destroy your panels. So long as there is not caked up dust or bird droppings, frequent rinses with just hose water should be more than enough.