Grid Direct versus Battery Backed PV Systems

Grid Direct PV System

A Grid Direct PV System is battery less system in which inverter is automatically control the flow of electricity from the PV array to the utility grid. This type of PV system contains:

• A PV array with racking
• A junction box to get the wires in the building.
• A DC circuit breaker
• An inverter
• An AC circuit breaker
• A meter to record the energy produced by your PV system
• A utility interconnection inside the Main Distribution Panel (MDP).

Battery Backed PV System

A battery backed PV system can be utility interactive or stand alone. Both utility interactive and stand alone PV systems use the following parts:

• A PV array with racking
• A charge controller
• DC circuit breaker
• A battery bank
• An inverter
• AC Load Center
• AD circuit breaker
• An MDP with overcurrent protection
• DC Load Center
• Fuel Engine Generator for backup