Your system only charges during the day, obviously. If your panels are not perfectly aligned to the sun you are losing a substantial amount of power to reflection and less than optimal collection area (look at them from the side, they have a small silhouette, from the front, large). How many hours do they receive direct sun each day? That will vary a little depending on your horizon.
Your input is probably an average of about 50-60 watts for 10-12 hours per day. Assuming the only load that runs all night is that 50 watt fan and all night is about 8 hours, you should be all set. Assume those iPods draw about 5w each for up to two hours, maybe you watch one hour of tv... You are pushing the limit.
Add more panels, or track the sun. Or do both.
Your system only charges during the day, obviously. If your panels are not perfectly aligned to the sun you are losing a substantial amount of power to reflection and less than optimal collection area (look at them from the side, they have a small silhouette, from the front, large). How many hours do they receive direct sun each day? That will vary a little depending on your horizon.
Solar Insolation in the southern US states are rated as six hours of usable sunshine a day. Yes, the Sun is out for longer than that but to use the full days worth, you would need to track the Sun. Therefore your 100 watt solar panel produces 600 watt hours a day. If we assume you have sufficient battery capacity, you are charging 300 watt hours of battery per day, this is because lead acid batteries are 50% efficient at charging. This may also be affected by your charger efficiency especially if it is at partial load but we do not know what your charger efficiency would be without looking at the specs. With a 12 V system, the 300 watt hours amounts to 25 amp hours of battery capacity however lead acid batteries do not like deep discharges and even deep discharge versions have their lives rated at a 20% draw on their capacity hence you would want 125 amp hours of battery capacity which would be a reasonable amount for two batteries although you have not specified your battery capacity. Fortunately, the excess capacity allows for coverage on cloudy days so designing for only a 20% draw is reasonable and you may even want more capacity depending on your area's weather statistics ( check weatherspark.com for weather statistics ). Now lead acid batteries are 95% efficient on discharging so you would get 285 watt hours out of that diurnal capacity but then there is the inverter. Inverter efficiencies can be 95% or even 98% at full load but as low as 50% on partial loads, a grid tied inverter is always at full load when operating but a battery based system is sized for peak loads. It's customary to use 65% efficiency for domestic use therefore you are getting 185 watt hours per day from your diurnal load. Your 750 watt inverter is capable of outputting 18,000 watt hours in that same 24 hour period so you have about 14 minutes of use at full load before depleting your diurnal load and 1 hour and 14 minutes at full load before depleting your batteries. An iPod touch only require 5 watts to charge so your 6 iPods and your 2 10 watt bulbs, your phone which is also 5 watts, 50 watt fan and your 100 watt TV amounts to 205 watts which were they drawing that for 24 hours be only 4,920 watt hours which is only 27.3% of your inverter capacity so it's more reasonable to expect only 50% efficiency out of your inverter hence you could operate those devices for 142 watt hours therefore 0.69 hours ( 41 minutes ) with your diurnal load, 3.47 hours ( 3 hours 28 minutes ) before depleting your batteries.
If all you wanted was to run your two 10 watt bulbs and charge six iPods. your phone, your fan and TV, you should find yourself a 260 watt inverter instead of your 750 watt inverter or better yet, wire up DC chargers and use DC appliances which would avoid the inefficiencies of the inverter altogether.
You'd probably want two more panels and perhaps a third battery as well as the smaller inverter, a different charge controller might be appropriate as well to maximize efficiency ( match the sum of the C ratings of the batteries which is usually their amp hour capacity divided by 1 hour or the sum of your panels short circuit current load, whichever is lower as that would be your maximum bulk charge rate, it's actually unlikely for you to reach full C charging but completely depleted batteries could require it ).
I am already using Sollar Energy. is the more beneficial for over life.
Peepee
I have a small solar setup in my room that consists of 2 12v deep cycle batteries connected in parallel, a net meter solar 30 Amp charge controller, a Thor 750 watt modified sine wave inverter, and a 100 watt Renogy solar panel. Of course there is also wiring in between these items. I live in arizona and my question is: how much energy should I be producing in theory and what can I run with it? Also, if I were to add additional solar panels to add up to the 30 amps that the charge controller can handle, how much more power should I be making?
With my current setup I can power my lamp which has 2 10 watt bulbs, charge 6 ipod touch over night (for work purposes) charge my phone, power a 50 watt fan and in some cases even power my 100 watt 55 inch tv. During the day I turn off and unplug everything I don't need and allow the batteries to charge.
the capacity of my batteries is 2,640 watt hours or 220 amp hours at 12 volts. So I would really like to have a setup that can produce enough without the need to unplug stuff during the day to let it charge. How much more power would I need?
Sorry for my long and confusing question.
