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Category: Misc.
Brand: Sunforce
Model: 39810
Availability: Product availability may differ by country. In Stock (USA)
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Sunforce 39810 Review
Sunforce 39810 Review by HMMWV "God, Country, Corps" (santa clara, CA USA)
QUICK UPDATE: Sunforce is selling obsolete Sharp 12% efficient panels no longer in production at 123W/panel, 2 panels to a kit with a junky inverter and charge controller.. See my review at Sunforce 39126 246-Watt High-Efficiency Polycrystalline Solar Power Kit but choose cautiosly as that product is from 2008 and is now obsolete which makes expansion of your system difficult due to the efficiency change.
---back to the review as it stood originally---
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 24x7 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
Sunforce 39810 Review by Glenn
I bought a few weeks ago (two) of these 80-watt panels and connected them up in parallel for 160 watts, to charge (4) deep cycle 12 volt batteries (connected in parallel) that run a 3000-watt pure sign wave inverter. The 2 solar panels keep the batteries fully charged. After draining the batteries down to 10.5 volts with the inverter running for the day to my appliances, it took only 2 days to fully recharge them back to 12.5 volts. I was also pleased to see the controller that comes with these panels was regulating the current very well. As the batteries were being topped off the current dropped as it should to prevent overcharging. These panels do not need rotating to face the sun all day long. No matter where the sun is (or whatever angle the rays hit the panel), the output voltage seems to be high. Very, very efficient! Some days I got as much as 11 Amps of current from the two panels together, more than what the manual claims. Not bad! GREAT!
I know these cost more than some other panels for about the same wattage but believe me, they are worth it! And I do not work or know anyone at this company. Just be careful and handle with care, they are big and made of a glass type material. I placed them on the ground facing south and tilted up about 45 deg against my backyard fence. I found no need to mount them. Just be sure they will not move or slide down and break. I placed a 6 foot 4x4 in front and stakes in the ground to hold the 4x4 in place. We had 50 mph winds and these panels never moved. Mounting them together with the supplied brackets makes them heaver and harder for the wind to move them. Remember, if you mount them on a house, you might need a city permit!
Glenn from San Francisco
Sunforce 39810 Review by SK
The 80 Watt solar panel is excellent, have used it for 2 summers at a off grid cottage, charging 2 6 volt batteries. The use has been for interior lighting (using the now 15W with 60 watt output bulbs). I am planning on getting another panel at 120 watt and add 2 more 6 volt batteries. I will use both panels connected but have different angle facing the sun since they will be fixed.
So far no problems and am happy with the performance.
More Reviews...
Sunforce 39810 80-Watt High-Efficiency Polycrystalline Solar Panel with Sharp Module:: Description
SHARP polycrystalline 80W solar kit that can produce 4.67 amps. Kit comes complete with a male D/C plug, mounting bracket and screws, battery clamps, voltage tester, quick connectors, and extra wiring. Ideal for boats, RV, 12v battery charging, pumps, satellite dishes, and many other uses. Easy to install, weatherproof, and allows for connecting multiple panels for more power. Unit has a 25-year warranty.
Sunforce 39810 80-Watt High-Efficiency Polycrystalline Solar Panel with Sharp Module:: Features
- Easy to install, virtually maintenance-free, and backed by a 25-year warranty
- Advanced polycrystalline design is highly efficient and provides superior power output
- Individual panel size: 21" x 48" x 2"
- Maximum power output: 80 Watts/4.67 Amps
- Multiple panels can be connected together for even more power
- Item Dimensions: 51 x 26 x 4 inches; 0 pounds
- Brand: Sunforce
- Model: 39810
- Product Type: Misc.
Sunforce 39810:Limited time only!
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