Hello gentlemen,

I hope to be in the right place.

I'm about to build a PV system and i have some questions.

As the title says i've a doubt regarding the design of a Solar panel system.

Right now my equipment has the following specs:

Solar Panel:

Max Power 6KW (250W*24)

Voc = 43.2 V

Vmax = 34.4 V

Isc = 7.85 A

Imax = 7.26 A

Battery Pack:

Rated Cap = 300Ah

Rated Voltage = 96V (12V*8)

Now the inverter doubt, assuming those two possibile scenarios

Inverter A:

Rated Output Cap = 5KW

Peak Power = 10KW

Battery Voltage (DC) = 48V

PWM Solar Controller Voltage = 48V

PWM Solar Controller Current = 60A

PV Max Input Voltage = 100V

Inverter B:

Rated Output Cap = 7KW

Peak Power = 14KW

Battery Voltage (DC) = 96V

PWM Solar Controller Voltage = 96V

PWM Solar Controller Current = 50A

PV Max Input Voltage = 200V

So my questions are:

1. Is it true that Inverter A can't be use if the Battery Voltage (assuming 96V) is greater than the allowed by the inverter? Will it be convinient to perform a parallel series so that the Battery Rated Voltage should be 12V*4 = 48V with a Rated Cap = 600Ah ?

2. Is it true that Inverer B can be used in both the configurations mentioned above?

Now i'm assuming that those specs are for each single panel (i've some doubts though)

3. Inverter A has a PV Max Input Voltage = 100V so 100V/43.2V leads to a maximum of 2 panels in series (with some margin). Is it true? To me it's not because the Solar Vmax (34.4V) * 2 panels = 68.8V which is greater than the PWM Solar Controller Voltage (48V). If what i'm saying is correct i can only use 1 panel.

4. Inverter B has a PV Max Input Voltage = 200V so 200V/43.2V leads to a maximum of 4 panels in series (with some margin). Is it true? To me it's not because the Solar Vmax (34.4V) * 4 panels = 137.6V which is greater than the PWM Solar Controller Voltage (96V). If what i'm saying is correct i can only use 2 panels in series.

Is it true i need a charge controller?

What could it be the best configuration then?

Regards,

Max

I hope to be in the right place.

I'm about to build a PV system and i have some questions.

As the title says i've a doubt regarding the design of a Solar panel system.

Right now my equipment has the following specs:

Solar Panel:

Max Power 6KW (250W*24)

Voc = 43.2 V

Vmax = 34.4 V

Isc = 7.85 A

Imax = 7.26 A

Battery Pack:

Rated Cap = 300Ah

Rated Voltage = 96V (12V*8)

Now the inverter doubt, assuming those two possibile scenarios

Inverter A:

Rated Output Cap = 5KW

Peak Power = 10KW

Battery Voltage (DC) = 48V

PWM Solar Controller Voltage = 48V

PWM Solar Controller Current = 60A

PV Max Input Voltage = 100V

Inverter B:

Rated Output Cap = 7KW

Peak Power = 14KW

Battery Voltage (DC) = 96V

PWM Solar Controller Voltage = 96V

PWM Solar Controller Current = 50A

PV Max Input Voltage = 200V

So my questions are:

1. Is it true that Inverter A can't be use if the Battery Voltage (assuming 96V) is greater than the allowed by the inverter? Will it be convinient to perform a parallel series so that the Battery Rated Voltage should be 12V*4 = 48V with a Rated Cap = 600Ah ?

2. Is it true that Inverer B can be used in both the configurations mentioned above?

Now i'm assuming that those specs are for each single panel (i've some doubts though)

3. Inverter A has a PV Max Input Voltage = 100V so 100V/43.2V leads to a maximum of 2 panels in series (with some margin). Is it true? To me it's not because the Solar Vmax (34.4V) * 2 panels = 68.8V which is greater than the PWM Solar Controller Voltage (48V). If what i'm saying is correct i can only use 1 panel.

4. Inverter B has a PV Max Input Voltage = 200V so 200V/43.2V leads to a maximum of 4 panels in series (with some margin). Is it true? To me it's not because the Solar Vmax (34.4V) * 4 panels = 137.6V which is greater than the PWM Solar Controller Voltage (96V). If what i'm saying is correct i can only use 2 panels in series.

Is it true i need a charge controller?

What could it be the best configuration then?

Regards,

Max

## Comment