Caught some sun today. (1 Viewer)

[headlight]

At the moment I am running my 24' mains powered TV from the inverter for F1 qualifying, Fire Stick from the TV, my mobile is on charge (12v) as my hot spot and TV signal booster (12v).

 

[MisterB]

By comparison this is what my 5.6 kw system feeding 2 x 5.8 batteries placed at 10 degree incline facing due south on my garage roofhas made so far today by 12:00 have also done 2 8kg machine washes 90 degree cotton and 1 dishwasher load. It is sending just under 4 kw to the grid. There is a small 1.2 kw system on the main house roof which is at the moment running the house regular load, fridge, freezer bits and bobs. We dont export from the main array as the smaller system now 13 years old still get 46p fit so is more financially rewarding than the new system. In the last 7 days we have used 80p from the grid. This is only for info to those who may or may not be interested.

View attachment 759878

Thanks for sharing. I am interested lol!


Hopefully mine will come on line soon. Just waiting for the new cabinets to arrive in Fogstars warehouse then I can build my battery get my install finished.

I was going to just do a DIY battery box, but the new Mason Seplos cases look too good for me to ignore.

I only have a 4kw system on the second tier of FIT and will be building a 13.5kw battery. All the cells have been top balanced, Inverter has been fitted, everything connected up, so just waiting for the cabinet !!

 

[Bessy765]

Sun is just setting 33.6 kw today

 

[jongood]

If your getting 46p per Kw Fit you could charge up batteries at night on off peak and export it back and make a profit

people are doing exactly that on Octopus.

 

[Bessy765]

If your getting 46p per Kw Fit you could charge up batteries at night on off peak and export it back and make a profit

the FIT set up is on the original 1.12 kw system and has to run with its own generation meter which records the gain. This has been running for many years. And benefits from the original FIT which was 46p I think it’s gone up a bit will check. The new 5.6 kw system has to run separates and no export tariff as you cant have both from the same property. So we cant do as you suggest and as the tariff from Scottish power is more than we get from the FIT it would be uneconomical if it were allowed.

If your getting 46p per Kw Fit you could charge up batteries at night on off peak and export it back and make a profit

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[Bessy765]

Is that saying that you are making 3744 watts from 5600 watts max ?.

That is correct.

 

[Jimbohorlicks]

That is correct.
View attachment 760575

Have you had that angle checked ,I thought it would have been better at 30 degrees?

 

[Bessy765]

True it would be but thanks to our local Victor Meldue thats the max. Sited in a rear lane on top of an existing structure took two planning applications to get it. Although panels on house roofs normally don't need planning, because it projects above the roof line on where its mounted its does. So much for trying to save the planet. There were concerns about possible wind shear owing to its the tallest garage in the street, this is in spite of when I built it it is over engineered in its construction just to make sure no problems and a structural engineers report.

 

[Raul]

By comparison this is what my 5.6 kw system feeding 2 x 5.8 batteries placed at 10 degree incline facing due south on my garage roofhas made so far today by 12:00 have also done 2 8kg machine washes 90 degree cotton and 1 dishwasher load. It is sending just under 4 kw to the grid. There is a small 1.2 kw system on the main house roof which is at the moment running the house regular load, fridge, freezer bits and bobs. We dont export from the main array as the smaller system now 13 years old still get 46p fit so is more financially rewarding than the new system. In the last 7 days we have used 80p from the grid. This is only for info to those who may or may not be interested.

View attachment 759878

It appears to me that you are exporting from battery. Why? That’s prime most expensive kWH, that, YOU should use for your own consumption only. Excess PV production should be exported when battery full, then cover loads and what’s left over you should export. Grid is laughing at you, propping them from your expensive battery.

 

[Raul]

Well I did as well but I meant the panels really,

View attachment 759381

It has been hot and hazy sun so not the best for peak output, I have seen over 520 watts on a clear sunny day but even still this is close to 200ah so not bad, we were nearly fully charged and then boiled the kettle a couple of times and cooked tea outside on the induction so got it all to do again tomorrow.

Here is a comparison of mine, 590w panasonic. Note power max each day it got hotter.

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[Bessy765]

It appears to me that you are exporting from battery. Why? That’s prime most expensive kWH, that, YOU should use for your own consumption only. Excess PV production should be exported when battery full, then cover loads and what’s left over you should export. Grid is laughing at you, propping them from your expensive battery.

With respect I think you should re read the post and picture before decrying someone else’s post. The only time the system exports to the grid is when the Batteries are FULLY charged as was the case around 10:30 this morning. And if our current usage requirements are fully met. We have since Wed on our return from France not paid one penny to the grid. The system charges the batteries to 100% and then sends any surplus we are not using to the grid then when the battery drops to 98% the process starts again. The continual consumption covers domestic fridge and separate freezer, positive pressure ventilation system, security cameras and a 150 litre hot water system than is computer controlled only to use excess power unless controlled manually. Then power company are certainly not laughing I can assure you.

 

[Gromett]

Here is a comparison of mine, 590w panasonic. Note power max each day it got hotter.
View attachment 760748

Can you tell us what the different colours on the bars are please? White, Light blue and Dark blue.

Also thanks to all who are posting info on here. Can you post if your panels are flat or at an angle and the total rated size (if you haven't already)

I am finding this fascinating.

Anyone done this sort of thing over a winter?

 

[Raul]

With respect I think you should re read the post and picture before decrying someone else’s post. The only time the system exports to the grid is when the Batteries are FULLY charged as was the case around 10:30 this morning. And if our current usage requirements are fully met. We have since Wed on our return from France not paid one penny to the grid. The system charges the batteries to 100% and then sends any surplus we are not using to the grid then when the battery drops to 98% the process starts again. The continual consumption covers domestic fridge and separate freezer, positive pressure ventilation system, security cameras and a 150 litre hot water system than is computer controlled only to use excess power unless controlled manually. Then power company are certainly not laughing I can assure you.

View attachment 760763

If I offended you please accept my apology. I don’t decry your post. I only say based on what I see. If your system reports correctly, then you do the maths and you will see why I said in my post. If you account for another PV array that’s not reported on that graph, then that graph it’s not true for both arrays.
Sorry no more from me.

 

[Raul]

Can you tell us what the different colours on the bars are please? White, Light blue and Dark blue.

Also thanks to all who are posting info on here. Can you post if your panels are flat or at an angle and the total rated size (if you haven't already)

I am finding this fascinating.

Anyone done this sort of thing over a winter?

From the bottom (white) up: bulk-absorb-float time spent. My panels are roof mount flat 590w panasonic HIT multilayer heterojunction cell.

 

[Gromett]

From the bottom (white) up: bulk-absorb-float time spent. My panels are roof mount flat 590w panasonic HIT multilayer heterojunction cell.

Lead acid batteries then?

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[Bessy765]

The 1.12 system on the roof for its size is more efficient owing to the angle of the roof and at this time of the years during the day covers most of the regular requirements for the

If I offended you please accept my apology. I don’t decry your post. I only say based on what I see. If your system reports correctly, then you do the maths and you will see why I said in my post. If you account for another PV array that’s not reported on that graph, then that graph it’s not true for both arrays.
Sorry no more from me.

No offence taken whatsoever all comments are welcome


On the picture posted the five circles are as follows

top left input from the 5.6 kw array, top right state of charge of the 2 x 5.8 kw batteries

centre inverter performance, bottom left surplus export to the grid.

although a picture not video the bottom right if the orange dots are going away from it it shows the surplus from the house 1.12 array going to the grid and inverter which in this case they are. If the dots were going towards bottom right it would show power being used as the roof array is not producing enough.

hope this makes sense??

 

[Raul]

Lead acid batteries then?

No, 400ah lifepo4. Absorb it’s about 20 mins max, sometimes 5-7 mins. If it was ANY kind of lead, absorb would been several hrs, with min 2hr every day.

 

[Swifter]

I have seen P max over the panel wattage earlier in the year when the sky is clear.

Still in bulk mode, got to 96% and then we put the kettle on so still didn’t fully charge.

It’s been a while since we had a chat funflair . I can’t remember if you use any gas or just purely electric?

 

[funflair]

It’s been a while since we had a chat funflair . I can’t remember if you use any gas or just purely electric?

Yes indeed still use has for heating and fridge.