Used solar panel is a very affordable source of component for DIY enthusiasts who wants to power their homes with solar energy as well as for businesses that deal with solar power systems. Most people think that used panels are worthless but on the contrary, majority of them still functions well enough to be reused. Combined with the fact that they come with a much lower resale value, it makes the deal all the more attractive. Here we will look at what you need to take note of when buying used solar panel.
When you come across panels with obvious damages, try to avoid them unless you have no other choice. However, there are common problems like condensation under the glass, chipped or cracks glass or broken electrical connections within the panel which can be fixed easily if you know how. In my opinion, if you are starting out your own DIY project, just keep it simple and go for one that does not have mechanical or electrical problems that you need to fix manually. They may be a little more costly but as a beginner you may not want to spend days fixing the panels without even starting your project. When you have successfully completed your first project and have gained some confidence, then you may consider going for used solar panel with more defects.
Another thing to note is that older used solar panel tends to be larger in size for every watt they generate. If space is not an issue to you, these would make a good deal. You should also note that solar panels’ efficiency in producing electricity decreases over time but at a very slow rate depending on their condition. Some panels’ only produce 1 or 2 watt less than what they originally produce even after 20 years of usage. This is amazing and panels are known to last for 20 to 45 years since the first ones are still kicking.
You need a multimeter when inspecting used solar panel. You should measure both the DC voltage output and the DC ampere (current) output. A typical 12 volt panel should give you 21 volts in full sunlight while panels designed to be connected in sets of 4 (4 panels in series) will show 4 to 5 volts. DC ampere is used to measure the amount of current produced by the panels which directly affects how many watt the panels are generating. For a 12 volt panel, multiply the current by 17 volts to get watts.
Do not be overly concerned when you see browning of the panels, these are caused by the materials used in the panels and usually will not adversely affect their efficiently by too much. Always measure the efficiency of used solar panel by the voltage and current output.
George Tho is a DIY enthusiast. With used solar panel, you can power your home with solar energy and even set up a home business selling solar power system on a low budget. Find out how you can build your own domestic solar power system with less than $200 even if you are a complete DIY novice.
George Tho
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Tags: 45 Years, Condensation, Cracks, Diy Project, Solar Panels
