Blog - GridFree

FAQ: 3-phase connection with the Micro Inverters 

Question: I intend to make 3-phase connection with the MicroInverters to the grid.  What do you suggest?

Answer: There are three options with the MicroInverter installation on the 3 phase system:

1) Balanced installation (mainly for Grid-Tied systems)

With the balanced installation the number of inverters per each phase is the same:  in the 24 pcs installation, you will install 8 inverters to each phase (3x8 pcs).

See details here: http://gwl-power.tumblr.com/post/36901093005/micro-inverter-an-easy-way-with-3-phase 

2) Demand-based installation (mainly for Grid-Tied self consumption systems)

With the demand-based installation, the number of inverters per phase is fixed according to the power demands on each phase. For example if phase L1 has 50% of long term average power demands, L2 has 30% and L3 has 20%, the number of inverters will match this average power demand: 12 inverters in L1,  7 inverters in L2 and 5 inverters in L3.

3) Dynamic installation (mainly for GridFree full self consumption systems)

With the dynamic installation, the number of inverters per phase is not fixed at all. The individual inverters connect in steps according to the actual demand on each phase.  For example if the demand on the phase L1 is 2300Watts, 10 inverters will be connected to L1.

If the demand increases more will connect to provide the extra power. This way the energy form the inverters is used in the most ideal way to match the consumption.

See additional details here: http://gwl-power.tumblr.com/post/36900205193/micro-inverter-allows-simple-energy-management