I have FIT with new battery and inverter, do I have the right meters?

Hi ​@Robster ,

it all appears complicated but is fairly simple physics/mathematics really.

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•Robster - 

  I had a FIT installation for which I get 20.38p per Kwh generated and 7.39p deemed export. 

I have just had the following installed 3 days ago.

 11 Aiko Panels 475w, Sigenergy, 10kw batterys x 2 and sigenergy 8kw Inverter

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Presumably you’ve told your FiT provider that your system has changed? This is important as everything is registered with Ofgem.

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•Robster - 

 My New meter is bi-directional, and currently shows Imp 52.6kwh ; Exp 41.8 kwh : Net -10.7

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Many (most?) charge home batteries overnight during winter to get a lower rate usage but unfortunately a ‘Net’ meter sees the charge as negative as you never get as much out of the batteries as you put in:

Battery output  minus  battery input gives you the negative reading.

Depending on your thinking and possibly calculations, you could either forget charging from the grid or (what many have done) get the meter rewired so that it doesn’t see the battery. It’s difficult to give a definitive answer as we don’t know your full circumstances but if you’ve read earlier parts of this thread, you will see that several have decided to get the meter rewired. 

Thanks Lightlog

Read through the whole post twice.

Told my FIT provider (E-on) from the outset, my original FIT generation meter is still live just not increasing, so not connected to anything other than power I am assuming.

I am waiting on my installer to fill out the battery declaration that my FIT provider has requested.

I think I may have to ask my installer if they can retire the system so it doesn’t see the battery, I don’t get as much on the FIT as others so if I lose it then it’s not major but would be nice to keep it as I still have 10 years to run on it.

On the plus side my G99 came back with 8kw export limit 😊

Sorry to dig this up again, but I still cant get my head round this net meter malarkey. Before I got my battery I was getting fit payments for anything I generated but over the winter period when I was charging my battery at cheap rate at night it seems as if it deducts this off my generation... This cant be right because I've already paid to charge the battery ,so why does it come off my net generation reading. Help please....again😁

If you think about it, when you charge the battery from the grid, it’s not been generated (by you anyway). 
The way the system works, anything going through the system gets counted, therefore the grid power needs to be deducted .. that’s what the NET meter does.

The easiest way around this is to get the meter and feed rewired so that it only sees the generated power.

It makes no difference that you’ve paid for the grid power to charge the batteries, it’s the deduction from any generated power that’s needed.

Thanks, still find this stupid though because im being charged twice really to charge my battery,. Im paying to fill it then getting it took off my generation meter....unreal

But don’t you agree that it’s not generated power?

It's only because that part is included in the positive meter reading that it is taken off (only that part)

I do agree thats its not generated...but im not getting the same generation payments as I would if I didnt have a battery. I get paid for what I generate, having a battery should not deduct from that figure...when u say get battery removed is this easy and can I get done of solar payment company...? Thanks again

It’s a rewire of how the battery and solar feed through the meter - ​@kanulondon has had theirs done so might be able to point you in the right direction 

Cheers ​@BPLightlog 

​@ScottyWigan The problem is your installer. The meter being bi-directional is simply doing the maths it was programmed to do. 

I am on a 2010 Tariff, most installers are not coming across folks with other FIT generation tariffs and are therefore not even asking or planning on ensuring the customer is getting the max pay outs. 

If you do nothing, you’ll see a vast improvement in spring summer months but I calculated that I was losing 1.5 or so KW every day in losses. I calculated it all in this thread….

As mentioned if you want to go back to EXACTLY how it was prior, you need to re-wire  to ensure your Hybrid Inverter is not connected to your generation meter. I actually installed a new grid tried generation meter to run my panels. No AC ever comes up the new bi directional meter. It only counts up the way

Problem solved. My new inverter is on different circuit and manages my batteries. I am actually adding more solar to the hybrid meter to charge the batteries. It won’t affected my generation meter as it’s on a different circuit

WBW

Thanks for your reply...I will mention this to my installer and hopefully he will be able to do.