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Solar PV Performance Thread - Post your monthly output

championc

I think it would be very useful to post Solar PV monthly generation figures. Not only could it highlight a problem further down the road, but there many be many owners who are getting far less than they expected (or promised by an installer) and would welcome feedback from other owners.

Of course, there are so many factors involved. Your location in the country (or abroad for our international boardies), your array size, your array direction and the panels mounting angle.

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DrPhilG

Nearly time for the monthly updates, but in the meantime I have a question.

How much of your generation do you manage to use? I have 6.2kwp system with 4.8kWh battery and I'm currently sitting at 71.5% usage and the rest exported.

I had 2 real howlers in there where I exported 38kWh across the 2 days as the sun was blazing and I wasn't home to charge the car or run washing cycles other than just 1 via timer.

I'd be on 78% if it wasn't for those 2 days kicking my ass.

unkel

The relevant percentage should be what you use excluding immersion diversion. The latter is not making you much money, even if you have a large array. With a medium or small array, it is quite likely costing you more money to self consume compared to exporting to the grid for free.

DrPhilG

unkel wrote: »

The relevant percentage should be what you use excluding immersion diversion. The latter is not making you much money, even if you have a large array. With a medium or small array, it is quite likely costing you more money to self consume compared to exporting to the grid for free.

True, I'd say I've only put about 20kWh into the immersion thus far.

garo

I don't have a diverter and am at 69% usage. But have worked from home this summer so dumped some excess into the hot water tank. If I wasn't at home I would probably be closer to 60%.

championc

And August has been mediocre too, pushing % up

phester28

quick question. I have a solis inverter and wifi datalogger but its setup to show generation only. Has anyone added a CT clamp to the inverter and was it hard to setup. From what I can find out all I need to do is run a cat 5 cable into the house and put the CT on the main tail from the meter. What do I have to change in the software to show production vs consumption?

Or has someone a cheap different approach. Its a nice to have rather than a must have IMO

Mickeroo

phester28 wrote: »

quick question. I have a solis inverter and wifi datalogger but its setup to show generation only. Has anyone added a CT clamp to the inverter and was it hard to setup. From what I can find out all I need to do is run a cat 5 cable into the house and put the CT on the main tail from the meter. What do I have to change in the software to show production vs consumption?

Or has someone a cheap different approach. Its a nice to have rather than a must have IMO

Is it the dongle that attaches to the inverter you have? My one shows my consumption and everything, maybe you have a slightly older version of the dongle?

phester28

Mickeroo wrote: »

Is it the dongle that attaches to the inverter you have? My one shows my consumption and everything, maybe you have a slightly older version of the dongle?

Its all brand new. The dongle does noting more than report data from the inverter to the cloud.

If you have a battery then you will have a more complete install as you the inverter needs to know when to charge and when to supply to the grid, and would have the CT by default. I am asking for anyone that has a fairly basic install or did it themselves.

The options would need to be changed in plant settings on your app

Mickeroo

phester28 wrote: »

Its all brand new. The dongle does noting more than report data from the inverter to the cloud.

If you have a battery then you will have a more complete install as you the inverter needs to know when to charge and when to supply to the grid, and would have the CT by default. I am asking for anyone that has a fairly basic install or did it themselves.

The options would need to be changed in plant settings on your app

Ah sorry, I do indeed have a battery so that explains why I get more info.

championc

phester28 wrote: »

quick question. I have a solis inverter and wifi datalogger but its setup to show generation only. Has anyone added a CT clamp to the inverter and was it hard to setup. From what I can find out all I need to do is run a cat 5 cable into the house and put the CT on the main tail from the meter. What do I have to change in the software to show production vs consumption?

Or has someone a cheap different approach. Its a nice to have rather than a must have IMO

You would need to change the "on-grid type" within in plant - go the Other Info > area

Spocker

First time poster, my system was installed in July and is a Sonnen 5Kw battery & inverter with 7 * 320w Sharp panels, South East facing on the roof:

For Aug:

Overall Consumption 459.88 kWh
Self Production: 207.3 kWh (36.8%)
Additional Grid Purchase 290.64 kWh (63.2%)
Self Consumption 99.6%
Feed-in 0.4%

Nice graph

Gazzler82

championc wrote: »

You would need to change the "on-grid type" within in plant - go the Other Info > area

Hmm. Have been having the same question. Is this what you are suggesting??

championc

Gazzler82 wrote: »

Hmm. Have been having the same question. Is this what you are suggesting??

Correct. Maybe you have the correct system selected but nothing is being recorded due to the clamp not being in place. You may need to configure it once connected because it's possible that it could maybe be configured as a limiter, which would then throttle production.

I don't know because I have a separate storage inverter

reklamos

phester28 wrote: »

quick question. I have a solis inverter and wifi datalogger but its setup to show generation only. Has anyone added a CT clamp to the inverter and was it hard to setup. From what I can find out all I need to do is run a cat 5 cable into the house and put the CT on the main tail from the meter. What do I have to change in the software to show production vs consumption?

Or has someone a cheap different approach. Its a nice to have rather than a must have IMO

What you need st a meter on din rail with modbus interface that goes into your fuse box. From there you would run data cable(cat5 will do) to your inverter and configure inverter to talk to your meter.

mun1

august 2020
3.7kw S/SW, 12 panels (8 south 35deg, 4 West vertical)

Total generated 324kWhr
Power bought from grid 188kWhr
Solar power to grid 106 kWhr
Monthly self use rate 64%

Winterman1234

Winterman1234 wrote: »

July Values

Generation -198kWh
Grid Consumption -93kWh
Hot Water Eddi -78kWh
Lowest Daily Gen on the 3rd - 1.7kWh
Highest Daily Gen on the 26th - 13kWh

August Values, South East facing 2.4kw,Donegal

Generation- 225kWh (Beating both June and July)
Grid Consumption - 98kWh
Hot Water Eddi - 86kWh
Lowest Daily Gen on the 4th - 1.1kWh
Highest Daily Gen on the 12th - 13.6kWh

Added bonus this summer has been doing the yearly switch, meaning I have paid nothing for electricity since mid April after receiving €175 switching credit from electric Ireland.

garo

garo wrote: »

4.8 kWp E/W. 2.4kWh battery. 24 degree slope.

July(kWh):
Production: 474 (528 predicted)
Consumption: 412 (512 pred.)
Import: 136 (64d, 72n) (154 pred.)
Export: 198 (170 pred.)

Best day: 19th: 24.1
Worst day: 7th: 7.6

August was the worst month since March.

4.8 kWp E/W. 2.4kWh battery. 24 degree slope.

August(kWh):
Production: 424 (462 predicted)
Consumption: 544 (512 pred.)
Import: 230 (131d, 99n) (203 pred.)
Export: 110 (153 pred.)

Best day: 8th: 26.7
Worst day: 16th: 2.7

Mickeroo

3.72kwp, SW facing, Connaught

July: 191.7kWh (logging only started on the 17th)
August: 397.8kWh (first full month with the system)

Gazzler82

August

238kWh
SE 3kw Cork
Best 14.3 on 12th
Worst 1.6 on 14th!

DrPhilG

August Stats
6.2kWp (2.8 south/3.4 west), 4.8kWh battery, Zappi & Eddi – Donegal

Generation – 572.1kWh
Export – 147.1kWh
Import – 302.4kWh

For some reason the myenergi hub won't give me monthly figures for Zappi & Eddi consumption. Maybe the units themselves will play ball, I'll check later. At a guess I'd say the Eddi got maybe 15kWh and the Zappi about 12 (8 of which was yesterday).

Worst day, 25th – 2.9kWh (thanks Storm Francis)
Best day, 8th – 35.8kWh

Also got my first electric bill since install, so a mixture of pre/post-PV.

€140, same period last year was €230 odd. Too early to draw too much from that of course due to variable like estimated meter readings etc but it’s a start.

KCross

DrPhilG wrote: »

For some reason the myenergi hub won't give me monthly figures for Zappi & Eddi consumption.

They are rewriting that part of the app and have disabled monthly reports for now. I think there is a new version of the app coming in the next week or so and maybe then they'll allow the monthly reports again.

rx8

August figures:
4.2kwp E/W.
Monthly production - 314.7kwh.
Monthly consumption - 342.3kwh.
Worst day: 16th- 1.7 kwh.
Best day: 8th- 21.1kwh.
I- boost got 35.1kwh.

Last bi-monthly bill was €65, at the start of August. This was half of the previous 2 years at the same time. They're no DrPhilG figures but hopefully we'll have an Indian summer in September.

DrPhilG

KCross wrote: »

They are rewriting that part of the app and have disabled monthly reports for now. I think there is a new version of the app coming in the next week or so and maybe then they'll allow the monthly reports again.

Ahh, didn't realise. Thanks. I thought something was set up wrong.

I wish they would provide a desktop version of the system too, makes it a little easier to dig for info.

DrPhilG

Ps who's hot and who's not at the minute for electric suppliers? My SSE deal is ending soon.

rx8

DrPhilG wrote: »

Ps who's hot and who's not at the minute for electric suppliers? My SSE deal is ending soon.

I think Bord Gais direct has the best rates atm,
or you could sign up to "One big switch " and get 40% off with energia. Not available to me cos I'm with them atm,but changing mid month.

DrPhilG

I was with Energia before, I'll check out bonkers shortly.

Gamma1

7 panels 2.1 kW tot
Sth facing
189 kWh produced August
100 kWh imported
Supplier Iberdrola

KCross

DrPhilG wrote: »

Ps who's hot and who's not at the minute for electric suppliers? My SSE deal is ending soon.

For me it has always been a ping pong between Energia and Airtricity for the best rates for rural customer with day/night rate.... mine is up next week also so I'll be switching back to Airtricity again because Energia probably wont give me the new customer discount but I'll ask them anyway!

I looked a week or so ago and the rates I saw were
Airtricity - Day/Night 15.42/7.64 Via bonkers only
Energia - Day/Night: 14.22/6.83

championc

championc wrote: »

January Yield - 75kw
February Yield - 121.55kw
March Yield - 200.59kw
April Yield - 279.11kw
May Yield - 396.34kw
June Yield - 264.13kw
July Yield - 261.88kw

3.6kw South Facing - South Dublin - 22 deg slope - 16.8kWh Lead-Acid Batteries
Live System Link - https://www.solarmanpv.com/portal/Terminal/TerminalMain.aspx?pid=95390

Mediocre Month

August Generated - 254.10kw / Consumed - 330.95kw / Imported - 135.73kw / Exported - 13.34kw / Eddi - 22kw / Zappi 8.5kw
Batteries - Charged 147.64w / Discharged 123.4kw

Meter Readings 01326 (00347 Day / 00979 Night)

DrPhilG

championc wrote: »

Exported - 13.34kw

How did you manage to export anything given that you have such a big battery?

I'm considering a change in the future from my Pylontech batteries, to a DIY build using recycled Leaf cells. I could switch from the 4.8kWh PylonTech I have, to about 6kWh of Leaf battery without much extra cost as I can sell the PylonTechs to fund the cells, BMS & install. I would then be able to expand that DIY system for a cost of around €60/kWh rather than about €330/kWh to add more PylonTech 2.4kWh modules.