Daily pv production

This strategy is all about the battery. Even without the ability to dump battery to the grid, and a large PV array, getting above 90% at the cheap rate is doable. Using the standard load profile, and an annual usage of 4200 kWh

No battery is 10.7% cheap rate. 10.9kWh with scheduled charging gets to 79.7%, and 21.8 gets to 96.7% cheap electricity

Not zero, but if you are prepared to gamble on the longevity of big differentials in time of use prices, this obviously works.

Add the other bits, and you are going to be able to shift strategy based on the prevailing market. @unkel is dreaming of flexible tariffs.

Wish I had the cash to follow suit, or the guts to go diy on the battery.

Cracking day to start June off on the right track

@unkel I do follow those DIY battery threads here. Definitely easier now than it was 2 years ago. But it gets a bit more complicated with an existing install, that I'm very happy with.

I reckon a DIY battery with A2A HP would put a big dent in my kerosene spend, but that could not be grid tied. Unless I swapped out...

@unkel exactly. Anything extra I add in summer would go straight to FIT, and in winter simply reduce my bill. Repayment is related directly to FIT.

The is space there to nearly double what I have, and the inverter can take it. But until I need to increase my electricity consumption, I cannot justify it. Maybe when an EV replaces the diesel that owes me nothing and keeps plodding along

You don't get extra panels for self use. Or for diverting to your hot water, or for charging your EVs. You get them purely for the feed in tariff!

To give you an example. A 400W panel at trade prices costs €40 + VAT. In Ireland, facing south, it makes €100 per year in FIT. Obviously there are the costs of installing it. But you get the idea about pay back time, it is insanely good in Ireland. Get those extra panels ASAP 😀

Great start to June.

Trade price from one of the biggest Irish wholesalers

It's incredible how much they've dropped in price.

As Tony Seba predicted a few years ago (and of course he would turn out to be right again), solar panels are now cheaper for use as structural building material than plywood. Think using it for fences, to build sheds, etc.

Nice one. Any pics?

If I had land and I had to put up a boundary wall, I would most likely use solar panels as fencing panels too.

Third day in a row in the 60's

5 days in

Ok so install took place Thursday, no issues other than a bit of wind and rain while the guys were on the roof, I’m pleased with the install and the guys were great very neat and tidy and left no trace that they had been here.

Output has been 38Kw, 33Kw, 29Kw, 28Kw and around 29Kw today.

I’m still finding my way round the Solis APP and cloud and hope to start integrating into Home Assistant in the next while.

🌞 6.96kWp PV System. West Dublin🌞

Yeah, what really suprises me (suppose never really gave it much thought) but is how much difference the fluffy white things in the sky make and how quickly output can go from many Kw to a few hundred watts in a split second.

TOU = ?

Little bit off the Daily PV production theme, but the answer to your question depends on a number of factors. If your night rate is significantly cheaper than your FIT rate, you want to be charging your batteries from <whatever % they are at → 100% every night). The logic is that your FIT rate will generate a higher rate if you export it than filling your battery.

E.g. some people on here have a €0.07 (or something night time rate), so they fill their batteries to 100% and then export everything they generate during the day getting €0.24 for that

If your night rate is close to your FIT rate, accounting for losses of 10%-20%…..it's a different strategy, so you need to figure out your numbers.

In a similar boat here with new install, but I won’t be considering battery replacement cost as a factor - they’ll be cheap as chips by the time they need replacement.

That said, I’ve turned overnight charging down to a trickle for the summer months. Solar starts generating just after 4:30am, only need 30-40% in battery once the house gets going around 7/7:30, and have the battery filling up all morning then after we’ve started work/left for school. Mind you, still waiting for FiT to be set up by esbn so trying to maximise consumption just now.

Ha ha yeap indeed same here, BER guy was only out yesterday, and switch to Energia is still not confirmed and yes agree with you about the cost of storage going forward.

I suppose what I'd really like to know is if there is any point charging and discharging batteries to make extra money from FIT?

should be okay, 50 amps at 50V (DC) should offload at about 2.5kW so four hours would drain your 10kWh battery if allowed (presets won’t allow it in reality).

That said, if you’re confident in those numbers (at least during summer), it might be better for our grid to let a few kWh go during peak demand 5-7pm instead. Solar will probably add more back into the battery before dusk anyway. In due course, I expect we’ll be paid handsomely for this a la Octopus in the UK.

It's funny isn't it, I'm only up the road from you and I'm about on par with May so far. June started off well but has really tailed off the last few days in East Cork. Tomorrow looks better though.

Pretty sure that app is wrong or else wrong location. Dont think we are getting 27 degrees all day tmoro anywhere in Ireland

Lowest yield so far today since install not even 14KwH.

🌞 6.96kWp PV System. West Dublin🌞

PV newbie here. Just had a 3.05kWp E facing, 4.35kWp W facing system installed, North Dublin. On some days, the output is very 'spikey', even though the overall yield is ok. See below as an example. Note I've no smart meter yet, so no export?

Is this spikiness expected? Obviously the irradiance changes for lots of reasons, but I can't measure this independently.