Domestic Solar PV Quotes 2020

So your on the right track there. I did a similar exercise a few months ago and wrote an application for it.

Couple of things you might have not considered in your logic - which is fairly close to what I found when I did the math myself.

• You need to account for losses. E.g. to put 5KwH into a battery you will need to buy 5.5Kwh-6.0Kwh (call it 15%) from the Grid due to losses.
• The batteries cost isn't linear for capacity. Typically you get more KwH/€ for larger batteries than you do with smaller ones. Meaning that larger batteries will tend to payback quicker. HOWEVER, you need to be able to cycle the capacity everyday to get that payback. If you buy say a 20KwH battery, but you only use 10 KwH a day.....well, you won't be able to generate the savings.
• The reality is that these are "perfect figures". You'd struggle to do them for example, you go on vacation for 2 weeks from the house then you can rule out those savings for those times. etc

I think as a general level, and I'm talking generally here......you're looking at a 9-10 year payback. Mileage will vary. Rates can go up, shortening payback etc,

Wow thats a lot of work and info. Firstly electricity prices will change and not in a good way. The FIT at this moment is nonsense. But having said that I would go for a battery, did you factor in the grant for the batteries?

You could go down the road of getting them and selling them at a profit then go for a self build like some have done from Aliexpress.

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That app looks great! Do you have a copy uploaded anywhere?

Based on your battery specifications I think that example is for the GivEnergy 8.2kwh? I was looking at that as a favourite option until yesterday when I read their warranty and saw they will simply offer a %of the initial cost back if it breaks. So if it breaks in year 2, they only offer 70% of your money back, or in year 9, just 5% of your money back. Compared to pylontec who seem to offer a replacement if it breaks within the 10year warranty.

Can I ask what battery you went with and what your experience has been like?

Thanks!

hi folks

i am new to this forum , i am looking to get get some quotes for a PV system in co Galway, would anyone recommend a trustworthy company

i am guessing a 12 panel system - but wiling to take the advice of an expert

I've only got mine installed about a week, so it's too soon for me to formulate an informed opinion based off a long term ownership, but provisionally, I've been pretty happy with the battery and the telemetry that they have on it. There's a "demo site" that you can go to and see the charts etc that Givenergy supply.

Login page - GivEnergy Cloud - Select "Demo Site"

I do have an issue in my installation where the 100Amp circuit breaker is tripping, but that's not likely to be a battery issue. it's tripping not because of over current, probably some earth leakage somewhere or a faulty breaker (it's rare, but it does happen), but installer is on it and will replace for free if necesssary. I was a bit apprehensive as I'd heard/read some negative comments about 1 year ago that the software was poor, but I'm happy to say that they have either improved it since, or the previous comments were unfounded.

As for warranty. I think that payback of say 50% after 5 years etc, was only if they could not source the replacement parts. if they could fix it, they would fix it for free so the % payback was only in the case of not able to get the bits. Not sure, but wouldn't every other company have the same or similar clause?

GivEnergy residential battery warranty

E.g. if you bought a puredrive battery and it failed after 5 years, and they couldn't get the parts.....what would they do? Dunno.

Will at some stage perform a round trip exercise to figure out losses to/from battery, but it will be a few weeks.

Probably about €3000 more than you should pay. Run away.

You would be paying 5k over. Maybe you even more as I don't even see a battery.

10k for a 3kWh system is scandalous.

I'd be surprised if it was paid back in 20 years tbh.

Well any news, I missed it.

Hi I have tried following this thread for some time now but I am just not technically minded and am more confused than anything else! I am looking for some recommendations for reputable companies to get some quotes and then I can start from there. I am based in the South-East.

Ahh, I think you hit the nail on the head there.....that's a "please go away" quote :-)

To be fair, a lot of installers won't touch a previously installed system. Some of it with some justification. If you system is very small, you may find that it's simply better to take out the current one and replace it with a totally new spec. Problem of course if that you probably won't be eligible for the grant.

14x panels x 380w = 5.3Kwp , 5 KwHr battery probably ~€10K from scratch......though you could recoup some of that by selling your existing kit.

Hard one to call to be fair. Do you know what your existing kit is? Make/model/size of inverter etc.

Would give folks here better options to give you

Don't worry we all started knowing feck all, you are in good hands here.

One important thing is, don't be afraid of asking the silly questions.

Surely it has a bit more written on it. Maybe there is a label on the bottom where the cables connect, or on either side.

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