Will I still need a dump load with grid tie?

[davec]

Reason I'm asking is our cluster of cottages is served from overhead lines by a wee transformer up one of the poles... once, maybe twice a year, the weather conspires to interrupt our power for an extended period. E.g. one winter we had no supply for 14 hours; another time, the transformer lost one phase (serving me and one other cottage) and had to be replaced.

I'm thinking about grid-tying ~2Kw wind and ~1Kw PV.

The question(s): the grid connection would normally serve as the dump load but given that it might not always be available, should I plan to provide another, full dump-load as back-up? Do grid-tie inverters support this (unattended)?

Thank you, Dave.

[Alan]

Hello Dave

You only need a dump load with a wind turbine to protect the turbine from mechanical failure if the electrical generated capacity of the turbine is not being sent into the grid system.
With a P.V. system if the power is not being sent into the grid no damage will occur to the P.V. system. The P.V. system will just sit there all day waiting to connect.

Regards

Alan