[gone-ot]

AC power cannot be "stored" but DC power can. So, the problem (or solution) actually depends upon the source!

• When the power comes from solar panels, it's DC, which is usually "captured" in batteries, THEN converted to AC which THEN must be synchronized with the grid "phase" before it can be exported onto the grid.

Interestingly, power companies are fighting a "lagging" POWER FACTOR (PF less than one) most of the time due to the predominance of inductive reactance (XL) due to motors' winding inductance. However, MOST DC-to-AC convertors have a "leading" power factor (due to capacitors) and thus actually HELP the power companies "balance-out" a lot of their PF problem(s).

• When the power comes from AC generator systems, such as in wave-action and wind-farm generators, it starts out as AC, then is converted to DC, which is then reconverted back into AC (to match grid "phasing"), which AGAIN helps the power companies with their lagging PF problem.

The PROBLEM with either arrangement is that the power company(s) have NO inherent control over when or how much power is being pushed back onto to the grid from the customers, and they do NOT have control over the PF-balancing aspects of all those different customer sourced semi-capacitive PF sources. In effect, the DOG (power company) is being SHAKEN by the TAIL (customers).