Really Need Some advise Urgently

[Earthstore]

That looks quite neat, well apart from the board that is, it should really have two AC isolators though, one for each inverter.

The tripping/high voltage that has been referred to is the AC voltage, if it is quite high coming into the house IE around 250v, and the AC cable to the inverters is too small it can cause the inverter to go over voltage, it is a very common install fault.

I hope this helps.

 

[crazygraham]

There is only the one ac isolator installed should there be a second one at the other side of the meter ?
I had asked for the gen meter to be in the electric box but was told it had to go up above.

 

[whinmoor]

At first glance it looks neat, tidy and symmetrical.

Two things jump out at me. Firstly, the lack of a fireproof board. We always use one when installing on wood. We tend to use plywood rather than chipboard.

Secondly, the DC isolators don’t look very far from the inverter. According to the installation instructions, there should be 300mm ventilation clearance above the inverter. Page 16 of this: View attachment SB30TL_40TL_50TL-IA-IEN120231.pdf.

You can see some of our installations as case studies on our website. We don’t normally attempt to conceal the cables when they are in a loft.

 

[crazygraham]

That looks quite neat, well apart from the board that is, it should really have two AC isolators though, one for each inverter.

The tripping/high voltage that has been referred to is the AC voltage, if it is quite high coming into the house IE around 250v, and the AC cable to the inverters is too small it can cause the inverter to go over voltage, it is a very common install fault.

I hope this helps.

Should there be one for each inverter then should I ask for another ?

They have used a 6mm cable from the loft to the consumer unit is that cable size ok?
And a 4mm cables for the dc array side.

 

[Earthstore]

The generation meter is normally mounted where you can read it easily, IE downstairs.
There can be a tiny advantage in having it close to the inverter though, and that is it does not suffer from any voltage losses in the cable, but most installers would install it where you can see it easily.

 

[Earthstore]

At a guess, and it depends on the cable length, 6mm should be OK, but without all the full spec you can not calculate it.

 

[MorganPVI]

SMA installation manual clearly states:

- Inverters to be mounted on heatproof surface, if not a brick wall then a fire proof board
- Each inverter must be on a separate MCB - therefore with this config you;d want 2 AC isolators
- RCD should be 100ma - if RCD is required

To be fair I was expecting a real dogs dinner, much neater than I'd have thought based on the OP's description. Cable sizing seems to be correct, better than the 1.5mm cable some muppet was running a 4000tl on in a previously posted horror story.

 

[BruceB]

I would agree pretty much with what has been said so far but with a couple of tweaks:

- Each inverter must be on its own mcb to meet the manufacturers instructions as already stated. A separate ac isolator for each (big red rotary knob), whilst useful is not essential and you could have one covering both inverters as they have done, because the inverters are right beside each other.

- If you have an rcd then it should be 200mA to meet the manufacturers instructions. Quote below is from the SMA rcd selection manual:
"For every connected inverter, a rated residual current of 100 mA has to be planned. The RCD's rated residual
current must at least correspond to the sum of the rated residual currents of the connected inverters. That means
that, if, for example, 3 transformerless inverters are connected, the rated residual current of the RCD has to be
a minimum of 300 mA."

As others have said, at first glance it is neat, which is a good sign.

 

[finchy]

As above .......

plus and the meter looks like its missing a Seal !

The installer must have missed the MCS Metering guidance

"5. Sealing

The meter and terminal cover should be sealed to ensure that the customer cannot​

access either.
"

 

[SPARTYKUS]

I would agree pretty much with what has been said so far but with a couple of tweaks:

- Each inverter must be on its own mcb to meet the manufacturers instructions as already stated. A separate ac isolator for each (big red rotary knob), whilst useful is not essential and you could have one covering both inverters as they have done, because the inverters are right beside each other.

- If you have an rcd then it should be 200mA to meet the manufacturers instructions. Quote below is from the SMA rcd selection manual:
"For every connected inverter, a rated residual current of 100 mA has to be planned. The RCD's rated residual
current must at least correspond to the sum of the rated residual currents of the connected inverters. That means
that, if, for example, 3 transformerless inverters are connected, the rated residual current of the RCD has to be
a minimum of 300 mA."

As others have said, at first glance it is neat, which is a good sign.

Neatness takes time, time is money. As said always a good sign in my opinion. also shows perhaps a little pride in their work.