Battery: (Deep Cycle)
From thread at www.wind-sun.com/ForumVB
1 - 65 Kyocera Panel
Your 65 watt array, will max out (in cool weather) typically somewhere around 57 watts max. Assuming 80% efficiency on charging and 80% efficiency on inverter and 2-6 hours a day of typical sun (winter/summer), you will be able to run a 1,000 watt inverter load for xx per day:
Inverter@1,000 watts = 57 watts * 2 hours * 0.8 * 0.8 / 1,000 watts per hour = 0.073 hours or 4.3 minutes per day (winter) Inverter@1,000 watts = 57 watts * 6 hours * 0.8 * 0.8 / 1,000 watts per hour = 0.219 hours or 13 minutes per day (summer)
A 100-125 amp*hour 12 volt battery will probably only supply about 10-20 minutes of power before damage occurs.
A bank of batteries (probably 20-40x the capacity of the single 100 amp*hour battery will probably run not 20-40x longer, but 40-80x longer because the batteries are more efficient at delivering power at a 20 hour rate than a 1 hour rate.
And, lastly, the type of load may define the type of inverter you can use--a modified sine wave inverter is cheap, but generates close to a square wave rich in harmonics which will cause overheating in many motors and appliances. A sine wave inverter (at 5+ x the cost and usually heavier) will do a much better job of running reactive and non-linear loads (motors and electronic loads would work better on a sine wave type inverter).
The 57 watt rating I gave you is an estimate of the power generated on a cool day with a bit of wind near high noon on a clear summer day--it is the number that California uses for calculating rebates as the manufacturer's numbers are way higher than anyone would typically find (except in cold/subzero conditions)...
Solar panels are "solar batteries" and only, at full sun (near noon with clean and cool weather) will output their rated voltage and current. Anything else will typically reduce their output dramatically. Typically, solar panels are only used in these types of applications:
1. Solar Panel charges a rechargeable battery during the day. The rechargeable battery supplies power at other times (either directly or through inverters, or a combination).
There is also another issue, the typical inverter cannot handle the wide voltage range available from a solar panel (a 12 volt panel can actually output between 17-23 VDC or so--probably high enough voltage to damage the inverter).
DIY Solar Panel:
My system current is connect to 2 walmart 27DC-6 12 Volt Everstart 115 amp hr , Deep cycle batts.. I ditched the HF controller
because honestly its a Junk controller.. Great for a power source connectiions with voltage regulation. But thats about it..
I just bought 10 Amp pwm HQRP Charge controller " EPIP SOLAR " But I am constantly using the power when the sun is shining bright for small wattage items, Plus I use LED lighting thru out my house. I also have these lights on at night for nice nightlights. But the HF cntroller is ok I guess if your just using the 45 watts of panels.. anymore than that. get a charge controller that works for the said amount of solar panels.
I do plan on Upgrading this charge controller to a MPPT model, But havent made any decisions on what Model or brand I will use yet.