When choosing cells for any DIY solar panel project, the price of your cells is probably the main consideration. You may obviously you still need batteries and an inverter regardless whether you're going DIY or off-the-shelf. If you were investigating the thought, you should understand the price per cell varies a good deal. The key is, there are tons cells provided with different technologies and therefore costs. These differences could affect the design and construction of your panel. New technology panels is probably not the very best solution to get a DIY project, simply due to the cost per cell v's effectiveness. Much depends on the job. If you are looking for extra turn on your farm, then the size your panels is less important when compared to a town house, the location where the size and weight with the panels on your own roof could be a serious issue. If you find that older technology cells certainly are a viable cost alternative, do it.
We have found the best way to compare the need for solar panels would be to compare the dollar/watt ratio. So, just how much do you pay for cells? Well, on the quick google search we located the most popular type of cells (0.5V, 80x150mm) opting for $290 for 100 cells ie $1.45/Watt. With those, you might have built THREE, 60W panels, having a combined total output of 36V or 180W. We now have even seen "off-spec" blemished cells choosing $0.60 per/Watt. While these won't perform to top specifications, they could be worthwhile considering. Be sure you really comprehend the downsides and possess good technical instructions and speak to the supplier before using such cells.
Another alternative is using scrap solar panels. Scrap cells are the ones broken during manufacturing, and so are often sold for inexpensive prices. You save serious dollars with scrap cells, but be ready for much more work and frustration in constructing your panels. You'll have to solder or use conductive epoxy for connections and fiddle, but, it is possible to build inexpensive panels.
Buying used cells can be a blessing or even a problem. Solar cells come with an effective duration of about 20-25 a number of their efficiency falls over their working life. This means that a cell that's been operational for Four to five years is already about 25% though its usable lifespan. Before you consider secondhand cells, be sure your dollar/watt and lifespan count the outlay.
If you're not into DIY, discover a complete panel. We found 60W panels "on special" for $180 (2.95/Watt). Sometimes they are sold with minimum orders of more than one unit, so be careful when placing any order. Have fun with your solar project.