Two inverters

[Mrjmegson]

Hey guys,

I'm hoping you can help me with my query.

I am hoping to install panels on both roofs, E/W, and bring each array down in two strings to two inverters, and each inverter have its own battery bank.

The way I see it is that each inverter and battery bank would be separate to each other, and both have a separate feed to my consumer unit.

Is this the best way to do this?

Will both inverters feed back into the house load equally?

Sorry, too many questions.

Jason

 

[binky]

Hey guys,

I'm hoping you can help me with my query.

I am hoping to install panels on both roofs, E/W, and bring each array down in two strings to two inverters, and each inverter have its own battery bank.

The way I see it is that each inverter and battery bank would be separate to each other, and both have a separate feed to my consumer unit.

Is this the best way to do this?

Will both inverters feed back into the house load equally?

Sorry, too many questions.

Jason

Should be fine, only downside will be 2 battery controllers in the meter tails, some wire directly into the tails, some use amp clamps.

Upside is 2 strings per array makes the arrays less affected by leaves, bird poo etc on the panels.

 

[Mrjmegson]

Hey Binky.

It's been a while since I worked out the figures, but my inverters only have two MPPT each, so max of two strings per inverter. I would have loved 4 strings.

Sorry, I didn't understand what you meant by "two battery controllers in the meter tails". My inverters are hybrid, so they have all the controller's built in, if that's what you mean. Lol, sorry.

 

[Mrjmegson]

Binky, one of these? https://ijopower.com/products/keto-battery-disconnector-with-80a-fuses

Although as my MC4 connector states a max A of 50, should I get one with a 50A fuse instead?

 

[johnb2713]

Sorry, I didn't understand what you meant by "two battery controllers in the meter tails". My inverters are hybrid, so they have all the controller's built in, if that's what you mean. Lol, sorry.

I think he meant current transformers or other import / export detection system




Like this

 

[Mrjmegson]

I think he meant current transformers or other import / export detection system


View attachment 14033

Like this

Ah right, the CT that goes round the incoming mains?

 

[johnb2713]

Ah right, the CT that goes round the incoming mains?

On the meter tails, you can put one on live, the other on neutral if it's tight for space, they do need to 'point' in opposite directions though (they often have an arrow on them that you point in the electrical direction of the consumer unit).

 

[Mrjmegson]

Cheers John. The meter tails are about 50cm long, so plenty of room for CT clamps.

Did you guys notice my question about the fuse rating of that Keto disconnect I found? It's got 80A fuses, and my battery terminal says its Max is 50A, so do I need a disconnect with an 50A fuse?