First, you should make sure you always keep your pH electrode moist, the best solution to submerge the probe for long and short term storage is 4M Potassium Chloride Solution (KCl).
[pdf] There are a few factors that can affect the cost of maintaining solar panels. This includes cleaning, replacing parts and carrying out regular checks. To start with, you may want to sign up for an annual service with a specialist solar panel company. This is a good way to keep your solar PV system in sound working order. .
To keep your solar panels functioning at maximum efficiency, it’s a good idea to have them cleaned regularly. Over time, dirt, dust and debris, along with bird droppings and other grime, can build up. This can affect the. .
One of the only other solar power maintenance costs you need to know about relates to the inverter. This is a key part of the unit, which converts the DC output of your panels into.
[pdf] 
As described by EL-PRO-CUS: 1. Submersible solar pumps: these pumps are capable of lifting water from 650 feet and aresuggested for a depth of approximately 150 feet. These pump water in the daytime (during sunshine, of course), and water is stored in an external tank forfuture use. 1.1. Main problems: pump. .
The average life expectancy of a solar pumpis about 20-25 years, with regular maintenance. For instance, panels and thepump need to be cleaned to prevent a build-up of debris, which could contributeto lower water production. .
There areseveral reasons a pump may not start or function at all. The first thing youneed to do is figure out exactly what is causing this problem You may be able torepair the solar pump, or call someone in to repair it, but you might. .
Any blockage of light will affect your solar pump’s performance in that it is unable to collect as much sunlight for energy production. Some pumps. .
If the angle ofthe solar panel is too steep, not all of the surface area is being used, andtherefore not as much energy is taken in. This results in a significantly decreasedproduction level.
[pdf] 
