Solar PV Performance Thread - Post your monthly output

Patmwgs

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

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

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

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

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

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

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

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

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

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

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

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

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

mun1

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

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

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

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

Super import result

MAULBROOK

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

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

ParkRunner wrote: »

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

Typo?

Winterman1234

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

First full month of my two arrays. 6.1kwp total

April - 822.1 kwh

Best day 24th - 43.3kwh

ParkRunner

DrPhilG wrote: »

Typo?

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

graememk

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

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

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

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

bod71

bod71 wrote: »

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

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

mp3guy

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.