Solar PV Performance Thread - Post your monthly output

irishchris · 01-04-2021 12:28am

2.88 kwp West facing: 172.7kwh
3.6 kwp South/SW facing: 189kwh (went live 6 march)

Total produced: 361kwh

pjordan · 01-04-2021 9:13am

Near Westport

4.6kw South facing

Total March: 263.1kw
Best day: 16th March - 24kw
Worst day: 3rd March - 1.4 kw

Mickeroo · 01-04-2021 9:20am

2020 (5.5 months): 1,254.1kwh

2021
January: 89.0kwh
Feb: 145.7kWh
March: 210.7kWh

3.7kWp S/SW facing, Mayo

Winterman1234 · 01-04-2021 9:22am

Winterman1234 wrote: »

February Values,South East facing, 2.4kwp,Donegal

(Predicted value - 94kWh)

Actual Gen - 87kWh
Grid Consumption - 147kWh
Hot Water Eddi - 27kWh
Export - 7kWh
Lowest Daily Gen on the 13th - 0.1kWh
Highest Daily Gen on the 25th - 8kWh

March Values, South East Facing, 2.4kwp, Donegal, No Battery

(Predicted value - 168kWh)

Actual Gen - 110kWh (March 2020 — 165kWh)
Grid Consumption - 128kWh
Hot Water Eddi - 41kWh
Export - 17kWh!
Lowest Daily Gen on the 9th - 0.2kWh
Highest Daily Gen on the 16th - 9.7kWh

DrPhilG · 01-04-2021 9:45am

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

Generation – 316.9kWh
Export – 19.9kWh
Import – 391.6kWh

Best day - 16th, 23.4kWh
Worst day - 9th, 1.5kWh

Pretty crap month again in Donegal, as I see others had too. A few utterly miserable rainy days generating about 2kWh and the occasional mad spike up to 20+.

My prediction was 387, only got about 82% of that.

Total since install at the end of July now 2043.3kWh. If I get close to my estimates I'll end up with around 4500kWh for the calendar year.

reklamos · 01-04-2021 9:46am

reklamos wrote: »

4.5kWp South facing in Meath
Feb Total 188.1kWh
Best day, 25th 21.5kWh
Worst day 7th 0.6kWh
Exported 0.3kWh
Imported 339kWh
Monthly self use 64%

4.5kWp South facing in Meath
March Total 316kWh
Best day, 30th 23.8kWh
Worst day 3rd 2kWh
Exported 0.8kWh
Imported 273kWh
Diverted 18.2kWh
Monthly self use 66%

slave1 · 01-04-2021 11:24am

Midlands
4.1kWp SW, 3.3kWp NE
603kW imported
346.5kWh Generated, approx 85%-90% from the SW string
338kWh consumed
158kWh to Eddi
23.8kWh to Zappi
Highest was 30th, 27.8kWh
36% self sufficient for month
Monthly cash saving based on average daily load and all non-load items like dishwasher/washing machine/immersion at night rate, €38.76

handpref · 01-04-2021 12:31pm

5.4kwp east west split
East of country

280kwh solar generation

idc · 01-04-2021 12:43pm

March Generated 361.4 kWh - 4.65 kWp (2.17 SE, 2.48 SW) North Dublin
89.71 kWh exported. Not sure how much Eddie used (i don't have hub and monthly figure is now 0 for new month!!)

Best Day 30th - 23.1 kWh
Worst Day 3rd - 2.2 kWh

PV generation 102% of projection

uphillonly · 01-04-2021 5:30pm

South Dublin 6 kW.
S 2.8 kW, E 3.2 kW. 5.8 kWh battery

Dec 2020: 63.4 kWh
Jan 2021: 78.5 kWh
Feb 2021: 186.7 kWh
Mar 2021: 354.4 kWh

Highest day: 30th 22.1.
Lowest: 3rd 2.0.
Self consumption: 93.6%
Self sufficient: 41.8%

Car has been running on sunbeams only since late Feb.

Bifacial panels living up to the marketing hype. 7 x LG 410w on the south array for total 2,870w. They have maxed out at 3,330w so far, 476w per panel - 116%. They regularly pass 2,900w.

championc · 01-04-2021 9:07pm

idc wrote: »

Not sure how much Eddie used (i don't have hub

Just use the front panel and look in the Savings Menu

graememk · 01-04-2021 9:40pm

graememk wrote: »

March Prediction : 370kWh

Just going to talk about my array from now on.
Added 4 more panels mid march bringing my total panel wattage to 8.64kWp on a 6kw inverter,
12 degree roof, NE/SW 50:50 (new march prediction - 439.75)

Have started counting solar generated during night rate (started at nearly 7 am today, also discharging batteries during nightrate too a bit as an experiment, If I know tomorrow is going to be a good day.

March
Generation : 432kWh
Solar Used Directly : 199.2kWh - €30.68
Solar Used Nightrate : 3.3kWh - €0.2442
Battery Charged : 200.2kWh
Battery Discharged Day : 155.6kWh - €24.77
Battery Discharge Night : 5.2kWh - €0.38
EVSE Divert : 6.1kWh - €0.45
Battery Discharged From Grid Charging : 73.4kWh - €4.55
Export : 23.2kWh
Total Savings : €60.83

April Prediction - 779.66kWh

_Puma_ · 01-04-2021 11:14pm

West of country. 5kW inverter with 14x315w panel array SW Facing at 30 degree pitch.
March total:284.2 kWh
Best day: 30/03/21 24kWh
Worst day: 03/03/21 1.7kWh

Have decided not to buy a battery but have bought a handy device that pairs with my PV plant . Have it in the kitchen so can see when I'm exporting at a glance and it gives some real time feedback in comparison to my logger. (to the point where sticking on the kettle you immediately see the spike). Has helped in getting into habit of using what I'm generating.

idc · 02-04-2021 8:31am

championc wrote: »

Just use the front panel and look in the Savings Menu

It only shows zero now for April. How do I see previous month details?

championc · 02-04-2021 9:11am

idc wrote: »

It only shows zero now for April. How do I see previous month details?

Ah right, ok, you were too late

Gazzler82 · 02-04-2021 10:47am

3kw Cork SSE

March
150.5kwh
Best 31/3 10 kWh
Worst 4/3 0.4 kWh

slave1 · 02-04-2021 12:18pm

graememk wrote: »

Just going to talk about my array from now on.
Added 4 more panels mid march bringing my total panel wattage to 8.64kWp on a 6kw inverter,
12 degree roof, NE/SW 50:50 (new march prediction - 439.75)

Have started counting solar generated during night rate (started at nearly 7 am today, also discharging batteries during nightrate too a bit as an experiment, If I know tomorrow is going to be a good day.

March
Generation : 432kWh
Solar Used Directly : 199.2kWh - €30.68
Solar Used Nightrate : 3.3kWh - €0.2442
Battery Charged : 200.2kWh
Battery Discharged Day : 155.6kWh - €24.77
Battery Discharge Night : 5.2kWh - €0.38
EVSE Divert : 6.1kWh - €0.45
Battery Discharged From Grid Charging : 73.4kWh - €4.55
Export : 23.2kWh
Total Savings : €60.83

April Prediction - 779.66kWh

Prob been said before but in case it saves you money, there are cheaper Electricity Plans out there compared to your 15.4c day/7.4c night rate, these are inflating your "savings"...

graememk · 02-04-2021 2:20pm

slave1 wrote: »

Prob been said before but in case it saves you money, there are cheaper Electricity Plans out there compared to your 15.4c day/7.4c night rate, these are inflating your "savings"...

I'm in contract until July. Wouldn't switch me before that.

Hopefully going onto the ev tariff, I'm on about 90%
night rate., Must double check my day rate, thought it was 14 something.. oh and it's going up in april I think too isn't it?

tails_naf · 10-04-2021 9:41pm

March Stats
6.4kWp (4.5 SSE, 1.9 WSW) , 4.8kWh battery, Eddi, dumb electric car charger – Tipperary

Generation – 436 kWh
Export – 25.6 kWh
Divert – 119 kWh
Import – 384 kWh

Best day - 19th, 31.6 kWh
Worst day - 8th, 1.9 kWh

Totals so far:
Month|Generate (KWh)|Export (KWh) |Divert (KWh) |Import (KWh)
November | 163 | -- | -- | 443
December | 117 | 0.5 | 22 | 552
January | 163 | 1.5 | 29 | 709
February | 213 | 9.6 | 47 | 496
March | 436 | 25.6 | 119 | 384
Total | 1092 | 37.2 | 217 | 2584

March was a good month - though the number of units purchased may be higher than expected given the generation amount - mostly due to some night-time use (half-filling the battery on night rate) - that's turned off now until next winter. Lots of divert, and a fair bit going back to the grid - both of which I'm sure will be excessive as the summer months come. I'll have to look into getting a Zappi...

slave1 · 11-04-2021 2:12pm

tails_naf wrote: »

... I'll have to look into getting a Zappi...

Do, our Leaf has only been charged once via the Grid since end of Feb, granted it's Lockdown mileage but still...

Patmwgs · 15-04-2021 3:20pm

tails_naf wrote: »

March Stats
6.4kWp (4.5 SSE, 1.9 WSW) , 4.8kWh battery, Eddi, dumb electric car charger – Tipperary

Generation – 436 kWh
Export – 25.6 kWh
Divert – 119 kWh
Import – 384 kWh

Best day - 19th, 31.6 kWh
Worst day - 8th, 1.9 kWh

Totals so far:
Month|Generate (KWh)|Export (KWh) |Divert (KWh) |Import (KWh)
November | 163 | -- | -- | 443
December | 117 | 0.5 | 22 | 552
January | 163 | 1.5 | 29 | 709
February | 213 | 9.6 | 47 | 496
March | 436 | 25.6 | 119 | 384
Total | 1092 | 37.2 | 217 | 2584

March was a good month - though the number of units purchased may be higher than expected given the generation amount - mostly due to some night-time use (half-filling the battery on night rate) - that's turned off now until next winter. Lots of divert, and a fair bit going back to the grid - both of which I'm sure will be excessive as the summer months come. I'll have to look into getting a Zappi...

If you have a vw electric car, the zappi is sometimes not working with it. Seems okay with the rest.

tails_naf · 15-04-2021 4:07pm

Patmwgs wrote: »

If you have a vw electric car, the zappi is sometimes not working with it. Seems okay with the rest.

I've a tesla, do they work with thr zappi? Currently it's connected to a 32A blue socket and the car charges at night (scheduled charge, controlled by thr car). My hope is zappi would be bale to charge thr car when there is excess, and I could switch the priority between it and the eddi. That said, when I'm back in work the car won't be at home during peak sun hours, so not sure a zappi will every be worth it then.

Patmwgs · 15-04-2021 4:52pm

tails_naf wrote: »

I've a tesla, do they work with thr zappi? Currently it's connected to a 32A blue socket and the car charges at night (scheduled charge, controlled by thr car). My hope is zappi would be bale to charge thr car when there is excess, and I could switch the priority between it and the eddi. That said, when I'm back in work the car won't be at home during peak sun hours, so not sure a zappi will every be worth it then.

They work fine with the tesla. If you have a battery backup it might make sense, someone else will have more experience with that setup.

slave1 · 15-04-2021 5:32pm

tails_naf wrote: »

I've a tesla, do they work with thr zappi? Currently it's connected to a 32A blue socket and the car charges at night (scheduled charge, controlled by thr car). My hope is zappi would be bale to charge thr car when there is excess, and I could switch the priority between it and the eddi. That said, when I'm back in work the car won't be at home during peak sun hours, so not sure a zappi will every be worth it then.

Tesla/Leaf owner here, both work fine with Zappi2

Patmwgs · 26-04-2021 7:32am

Is it okay to use fluctuating power from your own pv that could go from 1kwh to 3 or any where in between to charge your ev or will the non constant input hurt the battery through time. Or is a constant 7kwh charge better.

championc · 26-04-2021 7:47am

Patmwgs wrote: »

Is it okay to use fluctuating power from your own pv that could go from 1kwh to 3 or any where in between to charge your ev or will the non constant input hurt the battery through time. Or is a constant 7kwh charge better.

Absolutely nothing wrong with that.

There is a general Solar PV discussion thread for general questions

KCross · 26-04-2021 10:25am

Patmwgs wrote: »

Is it okay to use fluctuating power from your own pv that could go from 1kwh to 3 or any where in between to charge your ev or will the non constant input hurt the battery through time.

The constant up/down of the kW rate is akin to you opening and closing your tap and allowing more water to flow.... it doesnt "hurt" the tap to flow more water!

Constantly stopping/starting the charge session at short intervals would not be good for the long term lifespan of the electronics/contactors etc but a decent charge point should not do that anyway.

Patmwgs wrote: »

Or is a constant 7kwh charge better.

Better probably isnt the right word but it is more efficient to charge at 7kW than 1.4kW, but efficiency doesnt really come into it when the electricity is free to begin with!

Niceday20 · 29-04-2021 2:39pm

I am sure everyone is going to be posting some great numbers this month after the great sunshine over the last week.

As a complete newbie only having my 4.8kwp system with Solax Inverter and 5.8kW battery installed last week, I am trying to get my head around my own numbers.

From what I can see from the Solax Cloud, the YIELD figure displayed is NOT what is coming off the panels, but what is coming off the inverter, i.e. panels plus battery combined.

Is that the figure others are giving as their production so I am comparing like with like?

mp3guy · 29-04-2021 3:21pm

Niceday20 wrote: »

I am sure everyone is going to be posting some great numbers this month after the great sunshine over the last week.

As a complete newbie only having my 4.8kwp system with Solax Inverter and 5.8kW battery installed last week, I am trying to get my head around my own numbers.

From what I can see from the Solax Cloud, the YIELD figure displayed is NOT what is coming off the panels, but what is coming off the inverter, i.e. panels plus battery combined.

Is that the figure others are giving as their production so I am comparing like with like?

Known issue with SolaX, pretty stupid number to report. Nothing you can do unless you're comfortable with writing some Python.

drdidlittle · 29-04-2021 8:37pm

mp3guy wrote: »

Known issue with SolaX, pretty stupid number to report. Nothing you can do unless you're comfortable with writing some Python.

Even when you pull the numbers from inverter and try to calculate in excel I can't get them to make sense. Too much of a variation to be usable. Probably due to 5min sample rate. I'll try to look at some stable input data from last few days.

mp3guy · 29-04-2021 8:56pm

drdidlittle wrote: »

Even when you pull the numbers from inverter and try to calculate in excel I can't get them to make sense. Too much of a variation to be usable. Probably due to 5min sample rate. I'll try to look at some stable input data from last few days.

I didn't find that to be the case, works well for me (i.e. it matches up with the estimate they give on days I had no battery yield). How are you calculating it?

drdidlittle · 29-04-2021 9:05pm

mp3guy wrote: »

I didn't find that to be the case, works well for me (i.e. it matches up with the estimate they give on days I had no battery yield). How are you calculating it?

I used the wattage from panels converting to KWh. I need to look at it again as it was a few months ago. I've a battery (which may fudge app data) but the issue was I was getting values that differed too much from app. Both up and down if I remember correctly. I'll have a look again and report back.

championc · 29-04-2021 9:54pm

Can I suggest taking the discussion over to the "Solar PV Hints, Tips & Troubleshooting" thread

mun1 · 30-04-2021 9:38pm

mun1 wrote: »

Sun just set

5kw array (5kw since 17th march) (3.7kw South 35 deg slope 1.3kw West 90 deg)

March generated 243kwh
Best day 30th 22kwh
Worst day 1.3kwh

Self use 85%

Great to see the long days

April 2021 stats
Generated 566kwh
Best day 30kw on 25th
Worst day 3kwh on 20th
Self use rate 75%

ParkRunner · 30-04-2021 10:02pm

ParkRunner wrote: »

First go at this with 16 panel 6kw south facing system and hot water diverter going live on March 16th on the south east.

Generated 226kWh
Consumed 116kWh
Exported 109kWh
Imported 110kWh
Eddie 66kWh
Green 51%

Best day March 17th 29.4kWh
Worst day March 28th 4.1 kWh

Overall we could have managed usage a bit better but not a bad start & great to have so much hot water. A lot of export to the grid and am hoping FIT and an EV will cover a good bit of this. Future proofed while the grant was still going but held off on a battery. First electricity bill due soon.

First full month of solar & serious generation. Glad to be able to see the potential of the solar PV system and a bigger proportion of green usage overall.

Generated 740kWh
Consumed 464kWh
Exported 428kWh
Imported 152kWh
Eddie 153kWh
Green 67%

Best day April 24th 37kWh
Worst day April 18th 12.3kWh

idc · 30-04-2021 10:11pm

April Generated 599.9 kWh - 4.65 kWp (2.17 SE, 2.48 SW) North Dublin

Best Day 22nd - 29.8 kWh
Worst Day 18th - 5.6 kWh

I had projected only 495.37.

MAULBROOK · 30-04-2021 10:16pm

MAULBROOK wrote: »

South East direction in north Wexford.
6.2kw Solar
5kw Solis inverter
7kw BYD Battery
Eddie fitted.

March Total 494.6kw
Best day, Mar 13th 27.7kw
Worst Day Mar 10th 3.4kw
Exported 41.3kw
Imported 95.4kw
Eddie 136kw
Monthly self use 69.46%

February Total 219.3kw
Best day 25th 21.9kw
Worst day, 13th 0.2kw

April Total 782.4Kw
Best day, Apr 26th 38.2Kw
Worst Day Apr 9.8Kw
Exported 152.4Kw
Imported 1.6Kw
Consumed 641.1Kw
Eddie 243.94 Kw, lovely hot water. Boiler is now switched off till October, I hope.

slave1 · 30-04-2021 10:24pm

Super import result

MAULBROOK · 30-04-2021 10:28pm

slave1 wrote: »

Super import result

My wife has the usage down to a fine art, ie washing machine and dryer will be on and if she wants a tea she will switch the dryer off till the kettle boils.

She is pissed we bought 1.6Kw.

tails_naf · 30-04-2021 10:30pm

April Stats
6.4kWp (4.5 SSE, 1.9 WSW) , 4.8kWh battery, Eddi, dumb electric car charger – Tipperary

Generation – 705 kWh
Export – 53.7 kWh
Divert – 219 kWh
Import – 207 kWh

Best day - 25th, 38.6 kWh
Worst day - 20th, 2.9 kWh

Totals so far:
Month|Generate (KWh)|Export (KWh) |Divert (KWh) |Import (KWh)
November | 163 | -- | -- | 443
December | 117 | 0.5 | 22 | 552
January | 163 | 1.5 | 29 | 709
February | 213 | 9.6 | 47 | 496
March | 436 | 25.6 | 119 | 384
April | 705 | 53.7 | 219 | 207
Total | 1797 | 91 | 436 | 2791

The numbers above do not include car charging - which was approx 3x this month, all on night rate so approx 100-150KWh. Plenty of days I used excess energy to power heaters also, which cut down the export number.

DrPhilG · 30-04-2021 11:02pm

ParkRunner wrote: »

Generated 740kWh
Consumed 464kWh
Exported 428kWh
Imported 152kWh
Eddie 153kWh

Typo?

Winterman1234 · 30-04-2021 11:22pm

Winterman1234 wrote: »

March Values, South East Facing, 2.4kwp, Donegal, No Battery

(Predicted value - 168kWh)

Actual Gen - 110kWh (March 2020 — 165kWh)
Grid Consumption - 128kWh
Hot Water Eddi - 41kWh
Export - 17kWh!
Lowest Daily Gen on the 9th - 0.2kWh
Highest Daily Gen on the 16th - 9.7kWh

April Values, South East facing, 2.4kwp, Donegal, No Battery

(Predicted value - 265kWh)

Actual Gen - 269kWh (April 2020 - 274kWh)
Grid Consumption - 81kWh
Hot Water Eddi - 93kWh
Export - 74kWh
Lowest Daily Gen on the 20th - 1.4kWh
Highest Daily Gen on the 24th - 14.6kWh

irishchris · 30-04-2021 11:46pm

First full month of my two arrays. 6.1kwp total

April - 822.1 kwh

Best day 24th - 43.3kwh

ParkRunner · 30-04-2021 11:54pm

DrPhilG wrote: »

Typo?

I don’t think so. Still getting to grips with the figures. P.s. I don’t have a battery

graememk · 01-05-2021 12:20am

graememk wrote: »

8.64kWp on a 6kw inverter,
12 degree roof, NE/SW 50:50 (new march prediction - 439.75)

April Prediction - 779.66kWh

Still using the 15c/7.4 night rate (i know theres been a price increase, but havent got a bill yet for the exact figure

April
Generation : 976.4kWh = PVGIS-SARAH was on the low side, but April was a great month.
Solar Used Directly : 266.2kWh - €40.99
Solar Used Night rate : 33.2kWh - €2.46 - I'm at 500w at 6am on the good days
Battery Charged : 292.4kWh
Battery Discharged Day : 147.1kWh - €35.53
Battery Discharge Night : 83.6kWh - €6.19 - got to slow the export somehow!
EVSE Divert : 105.7kWh - €7.82
Battery Discharged From Grid Charging : 10.3kWh - €0.62 - 2 different periods, 1, I messed up my schedule and ended up charging, the other was a planned ESB outage and was making sure the battery had enough to run a few esentials.
Export : 278.9kWh
Total Savings : €91.15

May Prediction 960kwh

E30M3 · 01-05-2021 8:11am

April 667.9

Best day 25th 34.8

Worst day 20th 7

Solar iBoost 98.26

Installed on 5th August last year and this is the first month we generated more that we consumed for the month.

Imported 74.7

Exported 170.7

graememk · 01-05-2021 8:34am

ParkRunner wrote: »

I don’t think so. Still getting to grips with the figures. P.s. I don’t have a battery

Ah, that's your over all consumption, your solar consumption is the 300 odd figure.

jimmyging · 01-05-2021 8:36am

6.1 kw south facing ground mounted system
April 824.9 kW hrs
Export 239.1
Import 1718.5 kW hr mainly HP

bod71 · 01-05-2021 10:14am

bod71 wrote: »

Mar Gen. 200kw. Best day 12.5 Worst 1.4.

Apr Gen. 4kwSE/NW. 323kw. Best 18.2.Worst 2.4kw.

mp3guy · 01-05-2021 11:16am

mp3guy wrote: »

10.24kWp array, 5.76kWp SSW, 4.48kWp ESE both 45 degree pitch in Cork.

South: 385.39kWh
East: 305.41kWh
PV Total: 690.79kWh
Best Day: 26th (44.09kWh)
Worst Day: 4th (4.52kWh)

Grid Import: 674.21kWh
Grid Export: 141.55kWh

House Usage: 1066.07kWh
Car Usage: 131.26kWh
Water Usage: 26.12kWh

Installed the west array half way through this month, new specs:

16kWp DC / 11kWp AC: 5.76kWp SSW, 4.48kWp ESE and 5.76kWp WNW all 45 degree pitch in Cork.

South: 443.02kWh
East/West: 759.9kWh
PV Total: 1202.92kWh
Best Day: 21st (69.48kWh)
Worst Day: 12th (6.68kWh)

Grid Export: 376.05kWh
Grid Import: 198.32kWh
Surplus Energy: 177.73kWh

CO2 Saved: 422.91kg

House Usage: 829.58kWh
Car Usage: 92.43kWh
Water Usage: 103.18kWh

First month all my electricity usage was covered and then some, carbon positive/negative whatever you want to call it. Went most days 24 hours without any material import from the grid

Also finally setup hot water automation.

Why isn't my production higher? I have limited my export between 2.5 and 3.5kW due to voltage rise.

Solar PV Performance Thread - Post your monthly output

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