Solar photovoltaic systems, namely solar panels and the inverter output is proportional to the solar energy to generate power from the sun. This energy is instantly converted into electrical energy, can be used in the home or business. If the solar system produces more than appliances need that surplus is exported to the utility grid. If you are lucky, for some economic return, but for most solar customers next to nothing! This means that, unless you are using solar energy, because it is your production "given away" to the grid.
By increasing the local excess energy of this excess capacity to store it is needed, the inverter can manage the flow of power to ensure that you maximize your free solar energy, instead of wasting a "gift" to the grid.
Typically, this will be the first to use solar power, storage remaining, the use of stored energy during the night, if there are cheaper off-peak tariff - partially charged batteries at off-peak times. Some systems have a wisdom connected to the drive if the weather forecast the night before and decided to battery power from the cheap night rate charged or the following day from the sun to charge.
If we can prove, with real economic significance by using the energy generated by solar panels a day, so that the solar system will be enhanced. 99% of the domestic inverter fans and subway lights, may be television, but not for AC or refrigerator. So, if we started using fans, lighting almost entirely on solar energy, if it makes economic sense, equivalent to 2 - 3 years the return on investment should be good, we can spread the use of solar power in the country.
If the electricity consumption of the site and reduced access all the electricity from the panel, it will give you about 8--10 years to recover the investment. This high return is due to produce excess electricity to the grid can not be output to the higher export tariffs in Germany / UK / Spain / USA, general residential tariff low payback period of 3--5 years.
Although this is a good investment considering the very low O & M compared to replace the inverter battery trouble every now and then. In addition, power outages occurred mainly during the day time, therefore, the solar photovoltaic power generation can provide continuous supply has not run out of battery. So, effectively, you might last all day + 4 hours during the day, at night the battery supply + PV supply.
I think it is fair to say that the average income of families who can afford to have a spare battery inverter, can afford solar photovoltaic, if it provides some significant benefit more than business as usual. Challenge service providers face is to this benefit. This may be by economic interests or lifestyle or zero maintenance, fuel costs and other aspects no what these households click will be an interesting observation.
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