EcoRenovator - View Single Post - Chinese 300w MPPT Grid-Tie inverter

yallerrab · 11-05-12, 02:17 PM

Question for any or all of you:

I have a 9.9 kW system broken into three separate "systems" on three separate inverters. The panels are 185w sharp and they go to A fronius inverter (3 strings of 8 = 24) a sunny boy (1 string of 11) and a Sharp SunVista (1 string of 19). Now, I am interested in installing an marine selector switch below the DC disconnect for the sunnyboy. When the grid works, i leave it (except to charge the batteries - see below).

So, when the grid goes down, i will disconnect from the grid and switch the sunnyboy to a sine wave inverter, which will have a charge controller and marine batteries. That, in-turn, will cause the panel to energize which will cause the two remaining inverters to begin operating. As they produce (over produce), the excess will go to a "dump", as an outlet.

I understand that there will be times when I will have to disconnect from the grid, to charge the batteries (for the long periods of time the grid doesn't go down)

Does this make sense to you?

11-05-12, 02:17 PM	#35
yallerrab Lurking Renovator Join Date: Nov 2012 Location: In the woods - NY Posts: 2 Thanks: 1 Thanked 0 Times in 0 Posts	Question for any or all of you: I have a 9.9 kW system broken into three separate "systems" on three separate inverters. The panels are 185w sharp and they go to A fronius inverter (3 strings of 8 = 24) a sunny boy (1 string of 11) and a Sharp SunVista (1 string of 19). Now, I am interested in installing an marine selector switch below the DC disconnect for the sunnyboy. When the grid works, i leave it (except to charge the batteries - see below). So, when the grid goes down, i will disconnect from the grid and switch the sunnyboy to a sine wave inverter, which will have a charge controller and marine batteries. That, in-turn, will cause the panel to energize which will cause the two remaining inverters to begin operating. As they produce (over produce), the excess will go to a "dump", as an outlet. I understand that there will be times when I will have to disconnect from the grid, to charge the batteries (for the long periods of time the grid doesn't go down) Does this make sense to you? Last edited by yallerrab; 11-05-12 at 02:22 PM..