Sunforce 39810 80-Watt High-Efficiency Polycrystalline Solar Panel with Sharp Module.
Features
- Panel size 21″ x 48″ x 2″
- Advanced polycrystalline design is highly efficient and provides superior power output
- Maximum power output: 80 Watts/4.67 Amps
- Multiple panels can be connected together for even more power
- Easy to install, virtually maintenance-free, and backed by a 25-year warranty
The Sunforce 39810 80-Watt High-Efficiency Polycrystalline Solar Panel Module will give you several more reasons to love the sun. It provides the power you need, while helping you save money and protect the environment. This panel is ideal for homes, cabins, remote power, back-up power, and 12-Volt battery charging. This panel comes with compatible wiring, accessories and a voltage tester to help you start producing up to 80 Watts of clean, free power in all weather conditions.
The Sunforce 39810 80-Watt High-Efficiency Polycrystalline Solar Panel Module lets you harness the power of the sun, the most powerful and plentiful source of energy available to us. This inexhaustible supply of power is freely available wherever the sun shines, and gives users the freedom to power their homes, cabins, batteries, appliances and electronic equipment far from civilization–or even right in town. Solar power can help cut your energy bills by reducing your dependence on the main electrical grid, and can also provide back-up power during outages. Unlike nuclear and fossil fuels, solar power systems are clean and pollution-free, and they require very little maintenance to operate.
Customer Review:
In evaluating solar panels (and systems of many panels) the typical pricepoint is $5.10/watt in high volume production. If you are finding better pricing than that something is wrong.
An example may be inefficient panels that use larger panels, causing massive panel size such that it is 4-8 times larger than this panel with the same output.
Other inefficiencies to watch out for are caused by voltages that are not useful. You could, for example, have a panel that output 500V at 1/10 A for 50W sold for $250 – looks good financially but very few charge controllers go much over 250 volts (and many dont make 250 volts – some are 12 or 48 volt systems). So that panel is not much use
This panel is in the sweet spot – enough power to be useful (80W/3 is a simple approximation for what useful power you can get with a battery all day long – about 25W or so given inefficiences. So theoretically it could support a 25W load 24×7 with an 8 hour day of sun.
The last inefficiencies to watch out for are panels that need heavy sun before they produce any output. Some panels produce usable (1-2 amps) output with just ambient scattered light such as a foggy day, while others give near zero output unless the sunlight strikes them head on. This panel design gives output whenever there is light, which is good. More light is always better, but it could be worse.
So to sum it up – there are no pitfalls here. It passes all the checks for pricing and performance. We load tested a string of 12 of these for a customer to profile their output to help decide if a rotator would help and it showed that very little gain would come from the expense of an automatic rotation system due to the panel’s efficiency at many angles. With 12 panels we produced 1KW for 8 hours with taper up and down on both sides.
Best of all this can be used in series strings for grid tie systems or with battery maintainers
Source: http://www.amazon.com/Sunforce-39810-80-Watt-High-Efficiency-Polycrystalline/dp/B000MSCKM6/ref=sr_1_1?ie=UTF8&qid=1327717052&sr=8-1
Sunforce 39810 80-Watt High-Efficiency Polycrystalline Solar Panel with Sharp Module