Daily pv production

DrPhilG · 10-07-2022 11:24pm

https://www.boards.ie/discussion/comment/119319204#Comment_119319204

6.6kW was my peak today. Roasting hot all day but stayed cloudy til about 3pm.

irishchris · 11-07-2022 1:03am

https://www.boards.ie/discussion/comment/119319204#Comment_119319204

7.2 was peak power here today with sustained 6.5 for few hours. Heat and humidity was a killer here today and next few days look similar

slave1 · 11-07-2022 7:49am

Clipping for sure, those panels were probably hopping given the heat and pretty much zero breeze in the Midlands and clear skies from around noon, 34.7

ECO_Mental · 11-07-2022 9:38am

Here is the last two days my 6.1kWp system, as you can see yesterday it sustained 5.5kW after the morning cloud cover went but on Saturday where we got a bit of cloud cover during mid day and it peaked out higher. Its definitely the heat and the sustained heat on the panels that drops the peak power by about 10% on a right scorcher of a day.

My max production I have achieved so far is 44.5 kWh (28th June 2022) so for the last 3 days I have done over 41+ kWh which is 93-95% of max potential still very good.

THE ALM · 11-07-2022 9:48am

First decent day in a while yesterday almost hitting the 50kWh, sustained at about 6.3kW with the peaks at 7.4kW which would be the max I see. Took a few hours for the cloud to lift in the morning. Inverter in the attic hit 75° so need to get a fan up and connected to a smart plug with a bit of automation set up in home assistant, could hear the inverter whirring away.

No power for about 4hrs the day previous, only generating 17.5kWh, so glad to see a bit of sun yesterday.

steamdave · 11-07-2022 12:57pm

We worry about the 'hot' temperatures in this country. Just think what it must be like in mainland Europe and Australia during the summer time with their Hot temperatures. Severe clipping I would guess!

There is a very good explanation of panel efficiency on an Australian site https://www.cleanenergyreviews.info/blog/most-efficient-solar-panels

Dave

SD_DRACULA · 11-07-2022 2:00pm

Managed 46.3kwh the other day, the highest this year so far.

Glad to have the fans over the inverter, hit 47c max and the attic ambient temp was 32c max

It would easily go to 65c without the fans.

You can see the fans going on/off at the spikes.

DrPhilG · 11-07-2022 4:28pm

https://www.boards.ie/discussion/comment/119321520#Comment_119321520

Have you a picture of the fan setup?

I've just got one pointed in the general direction of the inverter as I haven't had time to get any more advanced than that.

Bakka · 11-07-2022 4:41pm

My 9.1 ground mounted system is live for the past 5 days. Made 219kwh in 5 days. Not so bad. That gives me an average of over 43.8kwh per average day.🤣 Very happy with my install and how it's working. Happy days and the sun is out and promised a good week this week.🌞

Bakka · 11-07-2022 4:43pm

Sorry that should be 43.8kwh per average day.🤣

bullit_dodger · 11-07-2022 5:01pm

https://www.boards.ie/discussion/comment/119321219#Comment_119321219

"clipping" is probably not the right word for it. That is usually where you have (say) 7Kwp in panels and a 5Kwp inverter. Then on a bright sunny (cold) day you could be generating 7Kwp if the sun was directly overhead, your inverter "clips" the output back to it's max level (5kw in this case), so you see a curve like. Bit like this curve (specifically the plateau at midday onwards)

Panel temperature efficiency is different to clipping, but to be fair both reduce your yield.

hick · 11-07-2022 5:29pm

Well folks delighted to join this merry band. Have 11 days worth of solar now from Rathfarnham (south Dublin) 5.2kW array though I have seen in produce 5.5. Was really happy with 35kW yesterday. Last night was the first time I topped up the car with the excess. Still waiting for battery install so watching it all dance out the door in the meantime.

Currently looking at options to track usage across the entire house circuit (rooms and appliances), so on the hunt tonight across threads to see what others are using. Tempted by the Emporia smart monitor, hopefully might get a deal on prime day tomorrow

ECO_Mental · 11-07-2022 6:27pm

https://www.boards.ie/discussion/comment/119322656#Comment_119322656

You might look at Home Assistant.....it will have a lot more flexibility to do other things down the line. I have mine on a Raspberry pi 4 and I am using ShellyEM's to log individual circuits in the house. Need a small bit of computer knowledge but nothing major, YouTube will teach you everything...

hick · 11-07-2022 9:00pm

Thanks Eco_Mental…..Home assistant on the way, on the project list for the next 2 weeks. Any tips would be great!

ECO_Mental · 11-07-2022 10:17pm

@hick YouTube!!!😋.....there are so many YT channels out there to get you started, there is a bit to learn but thats half the fun. I use the ShellyEM Shelly EM - Shelly Cloud to log the circuits. I am monitoring 6 circuits (wasn't planning to do 6 but Shelly sent me an extra EM by mistake) Home Assistant picked them up straight away and go them integrated in minutes.

Lads on here run fancy automations to run fans when the inverter runs hot so you can do lots of things with.

slave1 · 12-07-2022 7:37am

https://www.boards.ie/discussion/comment/119322431#Comment_119322431

Sounds nice, a few photos?

SD_DRACULA · 12-07-2022 9:17am

https://www.boards.ie/discussion/comment/119322370#Comment_119322370

Don't have a photo but nothing too fancy.

One of these wall mounted on two L brackets about 10cm right above the inverter and connected to a smart plug with Home Assistant turning it on/off based on inverter temp

Bakka · 12-07-2022 8:29pm

https://www.boards.ie/discussion/comment/119324784#Comment_119324784

It took some getting used to in the field. But now when I see it working, it's like a thing of beauty. It catches the sun most of the day, and is more SE orientation. Gets a load of morning sun. 9.1 kwh. 20 JA 455kw on a ground mount. So pleased with how neat it looks

hick · 12-07-2022 10:11pm

looks great, nice to have the space to do it!

DrPhilG · 13-07-2022 10:35am

https://www.boards.ie/discussion/comment/119325074#Comment_119325074

Ordered, cheers.

bullit_dodger · 13-07-2022 10:48am

Curious, why above the inverter? Would it be better to affix underneath the inverter (giving enough clearance for the wires of course), due to the fact that your effectively fighting against the warm air upcurrents.

Note: Totally get that a fan would easily and quickly overcome any convention esp one of those 4R rack mounted jobbies (I work in a computer lab)

SD_DRACULA · 13-07-2022 1:42pm

https://www.boards.ie/discussion/comment/119330471#Comment_119330471

Just not possible for me since the inverter is about 40cm off the ground and that space is taken by cables/conduit.

I also thought about having the fan in pull vs push but works great as is. It's a triple 120mm fan setup running at 2500rpms which is strong enough.

ECO_Mental · 13-07-2022 3:29pm

https://www.boards.ie/discussion/comment/119328632#Comment_119328632

With it being ground mounted did you choose the orientation to be SE, why not go directly south.

Bakka · 13-07-2022 5:45pm

https://www.boards.ie/discussion/comment/119332040#Comment_119332040

There are large trees which would slightly shade the panels directly facing south, and definitely with a low sun in winte,r it would affect generation of energy. Secondly the panels would have been at an angle and not visually as pleasing in my opinion. Because its in a field, it really doesn't make a huge difference as I get a lot of sun hitting it throughout the full day.