Preventing 'net metering'

[C.R.J.]

Ok, so I am new here and am nowhere near 'up to speed' with solar issues. I am reading a lot of topics on here and from books.
Anyway, a question/problem.
I am in Spain. Which as far as solar electric is concerned is a bit of a nightmare. legislation is due but not confirmed to come into effect in the coming months.
Part of that legislation is concerning 'net metering'. Essentially, if you put excess solar generated power into the grid, you are classed as a 'Power generating Company'.
As such you are required to abide by the legislation regarding power generating companies. The first part of which is the fees. This will be over and above 3000 euros. The second part is inspections of equipment on a regular basis with fees to be paid.
I want to avoid this situation by not feeding into the grid.
I am going to install solar power to reduce, not negate my electric bill. (Its a cost issue).
Winter here in Spain is short, but that's when I use the most electricity. So I need a system to provide for that. However that means i will be generating more solar power in the summer months.
Basically, what I am asking is, how do I prevent any excess power going to the grid?
There is probably an electronic system to do this, but not found it yet. My other thought was to isolate parts of my property and make them off grid.
Any thoughts from the experts would be appreciated.
CRJ

[Drastyn]

Hey mate, for avoid that situation the only answer is “storage” .. For example :

• SMA Kit Smart Energy 3600-7 with 7 years of warranty (include inverter) 4730,00 euro
• RES Fiamm 7,2 KWh – 48V (without inverter) 2320,00 euro

[Bikerscum]

Look into Solaredge inverters/optimizers. They have an inverter line specifically for this.... to prevent backfeed into the grid.

[organic farmer]

Where I live; net-metering does not pay you anything. You pay extra to be able to do net-metering. There is little incentive for anyone to net-meter.

My E-panel has an 'Aux-Input' breaker. You can connect an auxiliary source of power into this E-panel. That auxiliary power source could be a generator, or it could be grid power.

If you used grid power as your Aux-Input power source, then when you are making power you can use your own power. When your battery-bank is charged you can use that as your power source. Or when you need power from some other source you can use the grid.

[Bikerscum]

I did a little searching... here's a link to the Solaredge zero feed in inverter... http://www.solaredge.com/files/pdfs/...tion_flyer.pdf

[sensij]

All Solaredge inverters have that functionality, definitely the least expensive way to solve the problem, but maybe not the most robust, if that matters.

[C.R.J.]

Lots of good ideas there for me to ponder. The solar edge zero feed in inverter is a strong possibility. So thanks for the rapid replies, Drastyn, Bikerscum, Sensij. and organic farmer. I will now retire to my books and google to further my solar knowledge.

[Mike90250]

Hybrid style inverters (large, battery based 24 & 48V, >4Kw) often have a "Sell to Grid" setting that can be enabled or disabled. But you also have a bank of batteries to complicate things. So any Grid Tie inverter that can disable "sell to grid" should be good. It's also likely you will need to register and have it inspected at least one time, or the auditors will come around looking to see how you are stealing electricity,

[Andygt02]

What if you only use energy at night? Is the energy produced by the panels during the day entirely wasted without net-metering?

[sensij]

What if you only use energy at night? Is the energy produced by the panels during the day entirely wasted without net-metering?

Unless you store the energy (batteries), yes, panels are worthless for night time consumption without net metering.

[SunEagle]

Unless you store the energy (batteries), yes, panels are worthless for night time consumption without net metering.

Who needs power at night? Doesn't everyone just go to bed when the sun goes down?