Multiple inverters

[Guest]

So I already have a 1kw system, and being a bit of a dummy I also got a 1kw inverter. Now I want to add another 2kw up there and I want to use another 2kw inverter, but the chap on the phone from the solar mob says I can only use the one inverter and have to buy a 3kw and can't have 2 inverters running side by side, with the 1kw inverter doing the 1kw system and the other 2 kw inverter doing the 2kw system.

Is this correct? Can I only have the one inverter hooked up to my switchboard? I have a grid connect setup.

Thanks.

[Vern2]

If you have arrays tied to a combiner box then to an inverter. You can have as many setups like that as you want. Monitoring is another thing. Thats also how you add a wind turbin to the system. Larger wire or breaker at your power box might have to be done. I'm using two 5k inverters 6 gage to 50 amp breaker. My inverters could have been, just as likely, one 4k and one 5k. Just don't mix panel types in one series string.

Vern

[nodetihw]

Your sine wave (AC CYCLE) between the two inverters, will be out of phase and this/will could burn up something.

[Mike90250]

Your sine wave (AC CYCLE) between the two inverters, will be out of phase and this/will could burn up something.

Actually, no. Grid Tie inverters sense the grid's AC, and each will individually sync to the grid on their own. If you have a PV array split over 2 areas, you need to use 2 inverters to maximize your harvest.

[Altenergy Inc]

actually, Montgomery is telling you the right method. Each inverter will need to have its own breaker in the AC distribution panel. Multiple strings, orientations, etc would be appropriatley accomodated, have maximum mppt harvest,and would have individual UL1740 protection, while allowing multi unit monitoring, at least with any brand we use, SMA, Fronius or Solectria