HOW A BATTERY BACKED UP EMERGENCY SOLAR OR WIND POWER SYSTEM WORKS

To summarize: When utility power is available, the power from the utility is passed through the inverter's built in transfer switch to power your home's protected loads. The utility power is also used by the inverter's built in battery charger to keep your inverter's battery pack charged and ready for the next power failure. The solar or wind charging system or both will work in concert with the utility grid power to keep the battery pack charged and also prolong the system's runtime during an extended utility power failure.

When a power failure occurs, the inverter automatically begins converting DC power from your charged batteries into AC power that is used by your emergency loads such as your refrigerator, lights, radio, TV etc.

The emergency power that is produced by this type of system is extended because the battery pack is being recharged by the solar modules and wind generator. A smaller battery pack is needed when compared to a non solar or wind charged battery backed up system because the battery pack is continuously being recharged when the sun is shining or when the wind is blowing. Limitless run times are possible depending on the capacity of your battery pack, the power consumption of your loads, the size of your solar array and wind generator and the amount of available sunshine and wind.

Once the power from the utility company has been restored, this system will automatically pass the utility's, power through its built in transfer switch to your emergency loads for normal operation and will also begin, along with your solar modules and or wind generator, recharging your battery pack, in preparation for the next power failure. Under normal circumstances, in a typical installation, this type of system is entirely automatic. There are no manual switches that need to be activated in the event of a power failure or while recharging the battery pack. 

Next: A Solar Powered, Battery Backed, Grid Intertie, Emergency Power System.