Solar PV Performance Thread - Post your monthly output

wexfordman2 · 01-04-2020 12:06am

Well, my system is on now for exactly 1 year, and here is what it is reporting

A 5.85kwp system with a 5kwh battery and eddi diverter. I used the battery for night rate charging over the winter months, and now am back again to to purely solar pv charging.

So 12 month figures show

5.6Mwh produced
6.6Mwh consumed
2.2 Mwh imported
1.2Mwh exported

Battery throughout 4.1Mwh

championc · 01-04-2020 12:07am

championc wrote: »

January - 75kw
February - 121.55kw

2.7kw South Facing - South Dublin - 22 deg slope - 16.8kWh Lead-Acid Batteries
https://www.solarmanpv.com/portal/Terminal/TerminalMain.aspx?pid=95390

March Yield - 200.59kw / Bought - 203.08kw / Eddi - 6.49kw / Exported - 10.79kw / Consumed - 352.12kw
Charged 150.32kw / Discharged 124.56kw

Meter Readings 00720 (00172 Day / 00548 Night)

garo · 01-04-2020 12:39am

garo wrote: »

February
Expected 143
Actual 165
4.8 kW E/W 24 degree tilt
2.4 kWh battery

March was indeed brilliant.
Expected: 291
Actual: 342

Best day 22nd: 18.6
Worst 9th: 2.3

Imported 200 units from the grid and exported 93.

jams100 · 01-04-2020 1:27am

System Rating = 1.8 kWp (South facing Dublin)
March

Expected: 154.5
Actual: 169.68

Don't know how to tell what we imported/exported we are using the sunnyportal website if anyone has any ideas I appreciate it

Winterman1234 · 01-04-2020 8:49am

Winterman1234 wrote: »

2.5kw south east facing donegal

February Generation -82 kWh
Grid consumption - 127kWh
Hot Water(Eddi) - 38kWh

Definitely not getting the values like people further south and east. My March values are

Generation -165.5 kWh
Grid Consumption -119 kWh
Hot Water(Eddi) - 61kWh
Lowest Daily Generation on 9th -0.4kWh
Highest Daily Generation on 27th - 11.9kWh

2 people now working from home since 14th and a toddler!

championc · 01-04-2020 10:13am

jams100 wrote: »

System Rating = 1.8 kWp (South facing Dublin)
March

Expected: 154.5
Actual: 169.68

Don't know how to tell what we imported/exported we are using the sunnyportal website if anyone has any ideas I appreciate it

Can you not get details off the inverter itself ?

reklamos · 01-04-2020 10:43am

March Stats
South Facing 4.5kW

Monthly Production: 403.8kWh
Imported 218.9kWh
Exported: 5kWh
Hot Water 32.4kWh
Highest produced a day: 24.1kWh (March 20th)
Lowest produced a day: 1.4kWh (March 9th)

Charlie-Bravo · 01-04-2020 10:56am

wow, only 5kWh exported out of 403.8kWh. That's very effective.

reklamos · 01-04-2020 11:25am

astrofluff wrote: »

wow, only 5kWh exported out of 403.8kWh. That's very effective.

7kWh battery, constant monitoring/projecting and trying to use as much as possible during sunny periods helps a lot.
Still thinking of bumping up the battery to 10kWh

Shefwedfan · 01-04-2020 11:52am

Generation up, consumption slightly down.....still need to stop export to grid :-)

19 x 310kW panels( not sure what that is? 5.8kW of panels)
2.6kWh battery
SW facing

March
PV Generation this Month 441.80 kWh
House Consumption this Month 980.50 kWh
Battery Throughput this Month 193.40 kWh
Grid Import this Month 667.50 kWh
Grid Export this Month 122.50 kWh

Feb
PV Generation this Month 255.10 kWh
House Consumption this Month 1107.60 kWh
Battery Throughput this Month 175.20 kWh
Grid Import this Month 965.50 kWh
Grid Export this Month 71.30 kWh

spose · 01-04-2020 7:53pm

4.7 E/W no battery

Feb 80
Mar 126
Apr 313

Zardaz · 01-04-2020 8:52pm

Shefwedfan wrote: »

Generation up, consumption slightly down.....still need to stop export to grid :-)

19 x 310kW panels( not sure what that is? 5.8kW of panels)
2.6kWh battery
SW facing

March
PV Generation this Month 441.80 kWh
House Consumption this Month 980.50 kWh
Battery Throughput this Month 193.40 kWh
Grid Import this Month 667.50 kWh
Grid Export this Month 122.50 kWh

Feb
PV Generation this Month 255.10 kWh
House Consumption this Month 1107.60 kWh
Battery Throughput this Month 175.20 kWh
Grid Import this Month 965.50 kWh
Grid Export this Month 71.30 kWh

193.4KWh / 31 days in march = 6.24 KWh per day, divided by 2.6KWh battery capacity = 2.4 full cycles per day.

How are you managing to do 2.4 full cycles per day on the battery?

Shefwedfan · 01-04-2020 8:55pm

Zardaz wrote: »

193.4KWh / 31 days in march = 6.24 KWh per day, divided by 2.6KWh battery capacity = 2.4 full cycles per day.

How are you managing to do 2.4 full cycles per day on the battery?

No idea

IS that good or bad?

Zardaz · 01-04-2020 9:15pm

Shefwedfan wrote: »

No idea

IS that good or bad?

Depends - if you are managing that many cycles just from sunshine, it might mean that your charge/discharge rate (in amps) is relatively high, so the battery will wear out faster.
Perhaps you are doing an overnight cycle, charging from night rate, and discharging in the morning?
Perhaps you have an immersion diverter, that is sucking from the battery instead of just using excess juice from the panels?

Shefwedfan · 01-04-2020 9:31pm

Zardaz wrote: »

Depends - if you are managing that many cycles just from sunshine, it might mean that your charge/discharge rate (in amps) is relatively high, so the battery will wear out faster.
Perhaps you are doing an overnight cycle, charging from night rate, and discharging in the morning?
Perhaps you have an immersion diverter, that is sucking from the battery instead of just using excess juice from the panels?

I have no idea....sorry I think I have Mode 2 set on my system:

This mode designed to balance the use of PV during the day and battery to supplement when the PV is insufficient. The aim is to be grid neutral and priorities the home load from any source and uses the grid as a last resort.
This mode does not use supplemental AC charging overnight.

wexfordman2 · 01-04-2020 9:48pm

Shefwedfan wrote: »

I have no idea....sorry I think I have Mode 2 set on my system:

This mode designed to balance the use of PV during the day and battery to supplement when the PV is insufficient. The aim is to be grid neutral and priorities the home load from any source and uses the grid as a last resort.
This mode does not use supplemental AC charging overnight.

I have the same as inverter, mode 2 is when the battery charges by solar only and discharges on demand.

wexfordman2 · 01-04-2020 9:51pm

Zardaz wrote: »

193.4KWh / 31 days in march = 6.24 KWh per day, divided by 2.6KWh battery capacity = 2.4 full cycles per day.

How are you managing to do 2.4 full cycles per day on the battery?

Yeah, but it's battery throughput which means charged and discharged, so a single 2.6 cycling once would be 5.2kwh throughput?

Shefwedfan · 01-04-2020 9:54pm

wexfordman2 wrote: »

I have the same as inverter, mode 2 is when the battery charges by solar only and discharges on demand.

I know you have double the capacity, what mode do you put it in?

reklamos · 01-04-2020 9:55pm

Zardaz wrote: »

193.4KWh / 31 days in march = 6.24 KWh per day, divided by 2.6KWh battery capacity = 2.4 full cycles per day.

How are you managing to do 2.4 full cycles per day on the battery?

With system that size and a small battery it is possible to do multiple cycles. I checked my charge and it was 143.7kWh in March which makes 4.6kWh a day and that is 0.65 cycles on 7kWh battery. It would probably do full cycle if I did not turn on heavy users in the morning. On good day I have 50% charge at 9am.
I would say the battery is too small for this system it may not last with this usage.

AidenL · 02-04-2020 9:48am

20 x 315w panels here = 6.3kw
7.2kwh batteries

Produced 506.7kwh
Consumed 759.5kwh
Best day 37.3kwh on 29th March

wexfordman2 · 02-04-2020 9:55am

Shefwedfan wrote: »

I know you have double the capacity, what mode do you put it in?

I had mine in mode 3 until the hour went forward last week, and I now have it in mode 2.

Mode 3 made sense for winter months as I have night rate electricity, so the battery was charged at night rate, and discharged then once day rate kicked in an no pv available.

Mode 2, pretty much turns off AC charging completely, which makes sense in the longer days we are having now.

Shefwedfan · 02-04-2020 10:12am

wexfordman2 wrote: »

I had mine in mode 3 until the hour went forward last week, and I now have it in mode 2.

Mode 3 made sense for winter months as I have night rate electricity, so the battery was charged at night rate, and discharged then once day rate kicked in an no pv available.

Mode 2, pretty much turns off AC charging completely, which makes sense in the longer days we are having now.

Withe just 2kW battery I did use that for a while but to be hoenst it was gone so quick I stopped

eamon_l · 02-04-2020 11:55am

South Dublin, 4 panels E and 10 panels W at a 35 degree tilt, 4.2kWp system, 2.4kWh battery and Solar iBoost

March 295kWh produced
Solar iBoost 28.4kWh (partial result, reconfigured during the month)
Battery roughly 1.5 - 2 cycles per day

handpref · 02-04-2020 2:30pm

5.4 System East - west
9 panels each side

March 330 kWh generated 550 consumed

Always leave control set on mode 2 to try prolong battery life and not charge & discharge from night rate.

gally74 · 04-04-2020 9:53am

4.2 South West 35 degree pitch

Enphase system micro inverters with 2.4 battery plus Eddi

319 generated in march,

must clean 1 bird poo off the panels,

MAULBROOK · 30-04-2020 9:16pm

MAULBROOK wrote: »

The sun sets on the last day of the month so let the numbers begin.

North Wexford

6.2kw facing SE 152

Total generated 575kw

Best day 31.4kw on the 22nd and 27th
Today 31.2kw

Exported 104.7kw
Imported 24kw
Eddie 128kw

Month total 709.4kw
Best day 20th 38
Exported 221.6kw
Imported 1.5kw

reklamos · 30-04-2020 9:42pm

MAULBROOK wrote: »

Month total 709.4kw
Best day 20th 38
Exported 221.6kw
Imported 1.5kw

What size battery?

MAULBROOK · 30-04-2020 9:51pm

reklamos wrote: »

What size battery?

7kw BYD battery

mun1 · 30-04-2020 10:48pm

Limerick
3.7kw south/west facing
System up since 9th april

315kWr total generated
IBoost 130kWhr
Best day 23kWhr
Worst day 3kWhr

Winterman1234 · 30-04-2020 10:53pm

Winterman1234 wrote: »

Definitely not getting the values like people further south and east. My March values are

Generation -165.5 kWh
Grid Consumption -119 kWh
Hot Water(Eddi) - 61kWh
Lowest Daily Generation on 9th -0.4kWh
Highest Daily Generation on 27th - 11.9kWh

2 people now working from home since 14th and a toddler!

System 2.48kw south east facing, eddi, no battery.Donegal

April values are:

Generation -275kWh
Grid Consumption -89kWh
Hot Water Eddi -103kWh
Lowest Daily Gen on the 5th -2.7kWh
Highest Daily Gen on the 20th -14.9kWh

championc · 01-05-2020 12:00am

championc wrote: »

January - 75kw
February - 121.55kw
March - 200.59kw

2.7kw South Facing - South Dublin - 22 deg slope - 16.8kWh Lead-Acid Batteries
https://www.solarmanpv.com/portal/Terminal/TerminalMain.aspx?pid=95390

April Yield - 279.11kw / Imported - 161.42kw / Eddi - 27kw / Zappi 5kw / Exported - 8.2kw / Consumed - 383.21kw
Batteries - Charged 152.97kw / Discharged 123.4kw

Meter Readings 00890 (00202 Day / 00698 Night)

eamon_l · 01-05-2020 12:18am

South Dublin, 4 panels E and 10 panels W at a 35 degree tilt, 4.2kWp system, 2.4kWh battery and Solar iBoost
April 396kWh produced
Solar iBoost 88.4kWh/

spose · 01-05-2020 8:38am

4.7 E/W

Jan 80
Feb 126
Mar 313
Apr 463
Delighted to pass the first 1MWh mark in the last couple of days

Shefwedfan · 01-05-2020 8:45am

19 x 330 panels, 2.XkWh batter, SW facing

PV Generation this Month 657.20 kWh
House Consumption this Month 680.90 kWh
Battery Throughput this Month 144.80 kWh
Grid Import this Month 292.10 kWh
Grid Export this Month 262.80 kWh

I could have been off the grid if I had bigger batteries. With lack of movement the cars are not getting recharged so that means my business case for not buying the Eddi looks poor

reklamos · 01-05-2020 9:12am

4.5kWh, south 185 deg, 43 deg slope

Generated: 550.5 kWh
Used: 744.8 kWh
Import: 214.7 kWh
Export 14.3 kWh
Hot water: 82 kWh
Best day: 29.1 kWh April 21st
Worst day: 2.1 kWh April 26th

gally74 · 01-05-2020 9:33am

4.2 enphase system

Generated: 446

Got the aldi hot tub during the moth so i wont post imported numbers, LOL

Shefwedfan · 01-05-2020 9:47am

gally74 wrote: »

4.2 enphase system

Generated: 446

Got the aldi hot tub during the moth so i wont post imported numbers, LOL

How much does the hot tub pull out of interest?

AidenL · 01-05-2020 11:20am

AidenL wrote: »

20 x 315w panels here = 6.3kw
7.2kwh batteries

March :
Produced 506.7kwh
Consumed 759.5kwh
Best day 37.3kwh on 29th March

April:
Produced 776.5kwh
Consumed 769.1kwh
Best day 43kwh on 20th April.

gally74 · 01-05-2020 11:28am

Shefwedfan wrote: »

How much does the hot tub pull out of interest?

2.2 kw per hour, raises temp about 2 Celsius an hour

unkel · 01-05-2020 11:51am

gally74 wrote: »

2.2 kw per hour, raises temp about 2 Celsius an hour

800l capacity, the water is coming in at about 10C and you want to heat it to about 40C?

This uses 4.2 * 800 * (40-10) / 3600 = 28kWh or a bit over €2 on the night rate (this is roughly consistent with your assertion it would take about 15 hours at 2C per hour, so 15 * 2.2 = 33kWh)

Not that bad really, where do I get one? :pac:

handpref · 01-05-2020 12:05pm

5.4 kWp east - west
9 panels each side
5kwh battery

April generation 522kwh

Shefwedfan · 01-05-2020 12:18pm

gally74 wrote: »

2.2 kw per hour, raises temp about 2 Celsius an hour

Its not a constant 2.2 is it? just kicks in every so often i guess?

Not that I want one :P:P:P:P

while googling now

unkel · 01-05-2020 1:23pm

Shefwedfan wrote: »

Its not a constant 2.2 is it? just kicks in every so often i guess?

No, it would be a constant alright. See my calculations to back that up.

It's a bit like heating your water with the immersion, it would be on full blast until you either switch it off, or it reaches the set temp. You are probably thinking of an oven, that kicks in for a while and then switches off for a while.

gally74 · 01-05-2020 4:23pm

unkel wrote: »

800l capacity, the water is coming in at about 10C and you want to heat it to about 40C?

This uses 4.2 * 800 * (40-10) / 3600 = 28kWh or a bit over €2 on the night rate (this is roughly consistent with your assertion it would take about 15 hours at 2C per hour, so 15 * 2.2 = 33kWh)

Not that bad really, where do I get one? :pac:

it was in ALDI, 395 euro absolute fantastic to sit in the back garden, kids happy, 37 toastie, in lockdown....

and it absolute kills any export

the inflatable aspect of it creats good insulation.

gally74 · 01-05-2020 4:23pm

unkel wrote: »

No, it would be a constant alright. See my calculations to back that up.

It's a bit like heating your water with the immersion, it would be on full blast until you either switch it off, or it reaches the set temp. You are probably thinking of an oven, that kicks in for a while and then switches off for a while.

once at temp it only kicks in every now and again, its not on all the time then,

unkel · 01-05-2020 9:01pm

gally74 wrote: »

once at temp it only kicks in every now and again, its not on all the time then,

If it was, you would be boiled to death :pac:

joujoujou · 02-05-2020 8:51am

SSW facing 4.3 kWp, Mayo/Roscommon border. Stats for April:

Total yield - 485.7 kWh, including:

- self use - 343.59 kWh

- sent to grid - 142.11 kWh.

Daily average - 16.19 kWh.

Worst days - 2nd and 5th - 4.4 kWh each, best - 14th - 26.7 kWh.

Bought from grid - 133.81 kWh.

Oh, and 3800 grant appeared on my bank account yesterday!

macgabhs · 02-05-2020 9:30am

W facing 2kW, Nth County Dublin. Stats for April:

Total yield - 211.9 kWh, including:

- self use - 134.4 kWh

- sent to grid - 77.5 kWh.

Bought from grid - 514.3 kWh (heat pump still on in April)

jimmyging · 02-05-2020 9:51am

18*345w panels 6.21 kw south facing ground mounted system first months production
730 kw for the month
Best day 39.1 kw
I have no other stats for the moment as myenergi hub not seeing the zappi all the time ....

garo · 02-05-2020 6:47pm

garo wrote: »

March was indeed brilliant.
Expected: 291
Actual: 342

Best day 22nd: 18.6
Worst 9th: 2.3

Imported 200 units from the grid and exported 93.

4.8kW EW Dublin. 2.4kWh battery
April (kWh):
Predicted: 442
Actual: 500
Consumption: 463
Import: 156 (72d, 84n)
Export: 193

Best day: 21st: 25.2
Worst day: 18th: 5.4

Solar PV Performance Thread - Post your monthly output

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