When selecting a solar electric back power system for your home
or business, it is important to know approximately how much
power you will need to have available to power emergency loads
during a blackout. Unlike an offgrid solar system which needs to
replenish the amount of power consumed with available sunlight
within each day that the system is operating. A backup power
system need only supply power for the anticipated duration of a
blackout, which in most cases is only a few hours. In fact in
most cases, solar panels are not necessary in such a system
because the backup power system's batteries can be recharged in
anticipation of the next power failure by using utility power
once it has returned to normal operation. The only advantage
that solar panels would serve in such a system would be in the
event that a prolonged outage (More than 24 hours) should occur.
In a typical backup power system, batteries store the energy
that is needed to power the designated emergency loads for the
pre-determine period of