decent performance from our north facing system

[infinity]

we installed 4KW Solar world 250W Mono Black system last month using solaredge on a nortj facing roof with a pitch of 45DEg, it faces north-west by 10Deg

So far it has produced 586KWh and has been regularly peaking at 18Kwh/ Day.

I think considering its orientation etc it is exceeding my expectations on what it would produce.

I know that winter will be a different story but t will be interesting to see how it actually performs over the whole year.

Im going to try and update the total KWh on this thread once a month from now on. install date was 6/6/2013

 

[FB.]

2+2 N/S split system (16x 250Wp Kinve KV250-60M with Aurora PVI-3600 indoor model) on 30 degree roof in Cambridgeshire.
It had SAP target around 2800kWh and generated about 3125kWh in its first year, from mid-May 2012 to mid-May 2013.
An "outperformance" of 12% even during a very dull/wet year.
Even at the current 14 pence (ish) FiT and 0.5x 4 pence (ish) export tariff that'd amount to payments just over £500/yr from a 2+2kWp N/S split system, plus bill savings probably £150 for total benefits of £650/yr and payback around ten years.

In the same period, my 3.75kWp (15x 250Wp same panels and inverter as above) which is also in Cambridgeshire had a SAP target around 3000 and actually generated around 3350kWh. A similar outperformance of 12% during a dull/wet year - including several "lost" days in both January and March where the panels were generating nothing or almost nothing due to being covered in snow - generated exactly zero; 0.00kWh on 21st January 2013.

 

[SolarCity]

Interesting to see how this gets on with the annual figures. Keep us updated?

 

[infinity]

Luckily it's solaredge so I can monitor it whenever I like. What's interesting is its only peaking at around 2kw at around 4pm, yet still producing those figures.
Il post on 1st of each month with updated figures.

 

[FB.]

Luckily it's solaredge so I can monitor it whenever I like. What's interesting is its only peaking at around 2kw at around 4pm, yet still producing those figures.
Il post on 1st of each month with updated figures.

The Climate-SAF-PVGIS seemed to accurately predict the annual generation of by my 3.75kWp 40degree-tilt ESE system and the 2+2kWp 30degree-tilt N/S split system.
So I would use it as a guide for what to expect.
Link here:
PV potential estimation utility

It suggests the following for a 4.0kWp WNW-facing system at 45-degrees IN MY AREA - JUST NORTH OF CAMBRIDGE:

[TABLE="class: data_table"]
[TR]
[TD="colspan: 5"]Fixed system: inclination=45°, orientation=-100°
[/TD]
[/TR]
[TR]
[TH="align: left"]Month
[/TH]
[TH]E[SUB]d[/SUB]
[/TH]
[TH="width: 40"]E[SUB]m[/SUB]
[/TH]
[TH="width: 40"]H[SUB]d[/SUB]
[/TH]
[TH="width: 40"]H[SUB]m[/SUB]
[/TH]
[/TR]
[TR]
[TD]Jan
[/TD]
[TD="align: right"]1.74
[/TD]
[TD="align: right"]54.1
[/TD]
[TD="align: right"]0.62
[/TD]
[TD="align: right"]19.3
[/TD]
[/TR]
[TR]
[TD]Feb
[/TD]
[TD="align: right"]3.68
[/TD]
[TD="align: right"]103
[/TD]
[TD="align: right"]1.22
[/TD]
[TD="align: right"]34.0
[/TD]
[/TR]
[TR]
[TD]Mar
[/TD]
[TD="align: right"]6.87
[/TD]
[TD="align: right"]213
[/TD]
[TD="align: right"]2.19
[/TD]
[TD="align: right"]68.0
[/TD]
[/TR]
[TR]
[TD]Apr
[/TD]
[TD="align: right"]11.20
[/TD]
[TD="align: right"]335
[/TD]
[TD="align: right"]3.60
[/TD]
[TD="align: right"]108
[/TD]
[/TR]
[TR]
[TD]May
[/TD]
[TD="align: right"]13.40
[/TD]
[TD="align: right"]415
[/TD]
[TD="align: right"]4.38
[/TD]
[TD="align: right"]136
[/TD]
[/TR]
[TR]
[TD]Jun
[/TD]
[TD="align: right"]13.90
[/TD]
[TD="align: right"]416
[/TD]
[TD="align: right"]4.61
[/TD]
[TD="align: right"]138
[/TD]
[/TR]
[TR]
[TD]Jul
[/TD]
[TD="align: right"]13.00
[/TD]
[TD="align: right"]402
[/TD]
[TD="align: right"]4.33
[/TD]
[TD="align: right"]134
[/TD]
[/TR]
[TR]
[TD]Aug
[/TD]
[TD="align: right"]10.70
[/TD]
[TD="align: right"]331
[/TD]
[TD="align: right"]3.56
[/TD]
[TD="align: right"]110
[/TD]
[/TR]
[TR]
[TD]Sep
[/TD]
[TD="align: right"]8.16
[/TD]
[TD="align: right"]245
[/TD]
[TD="align: right"]2.68
[/TD]
[TD="align: right"]80.5
[/TD]
[/TR]
[TR]
[TD]Oct
[/TD]
[TD="align: right"]4.71
[/TD]
[TD="align: right"]146
[/TD]
[TD="align: right"]1.56
[/TD]
[TD="align: right"]48.5
[/TD]
[/TR]
[TR]
[TD]Nov
[/TD]
[TD="align: right"]2.36
[/TD]
[TD="align: right"]70.7
[/TD]
[TD="align: right"]0.82
[/TD]
[TD="align: right"]24.6
[/TD]
[/TR]
[TR]
[TD]Dec
[/TD]
[TD="align: right"]1.41
[/TD]
[TD="align: right"]43.6
[/TD]
[TD="align: right"]0.52
[/TD]
[TD="align: right"]16.0
[/TD]
[/TR]
[TR]
[TD="colspan: 5"][/TD]
[/TR]
[TR]
[TD]Yearly average
[/TD]
[TD="align: right"]7.60
[/TD]
[TD="align: right"]231
[/TD]
[TD="align: right"]2.51
[/TD]
[TD="align: right"]76.5
[/TD]
[/TR]
[TR]
[TD]Total for year
[/TD]
[TD="colspan: 2, align: right"]2770
[/TD]
[TD="colspan: 2, align: right"]917
[/TD]
[/TR]
[/TABLE]



E[SUB]d[/SUB]: Average daily electricity production from the given system (kWh)
E[SUB]m[/SUB]: Average monthly electricity production from the given system (kWh)
H[SUB]d[/SUB]: Average daily sum of global irradiation per square meter received by the modules of the given system (kWh/m[SUP]2[/SUP])
H[SUB]m[/SUB]: Average sum of global irradiation per square meter received by the modules of the given system (kWh/m[SUP]2[/SUP])

 

[FB.]

Estimates for each of the two 2.0kWp N/S arrays of the split system:

[TABLE="class: data_table"]
[TR]
[TD="colspan: 5"]Fixed system: inclination=30°, orientation=180° (NORTH-FACING ARRAY)
[/TD]
[/TR]
[TR]
[TH="align: left"]Month
[/TH]
[TH]E[SUB]d[/SUB]
[/TH]
[TH="width: 40"]E[SUB]m[/SUB]
[/TH]
[TH="width: 40"]H[SUB]d[/SUB]
[/TH]
[TH="width: 40"]H[SUB]m[/SUB]
[/TH]
[/TR]
[TR]
[TD]Jan
[/TD]
[TD="align: right"]0.49
[/TD]
[TD="align: right"]15.1
[/TD]
[TD="align: right"]0.43
[/TD]
[TD="align: right"]13.3
[/TD]
[/TR]
[TR]
[TD]Feb
[/TD]
[TD="align: right"]0.98
[/TD]
[TD="align: right"]27.5
[/TD]
[TD="align: right"]0.78
[/TD]
[TD="align: right"]21.8
[/TD]
[/TR]
[TR]
[TD]Mar
[/TD]
[TD="align: right"]1.83
[/TD]
[TD="align: right"]56.7
[/TD]
[TD="align: right"]1.43
[/TD]
[TD="align: right"]44.4
[/TD]
[/TR]
[TR]
[TD]Apr
[/TD]
[TD="align: right"]4.22
[/TD]
[TD="align: right"]127
[/TD]
[TD="align: right"]2.83
[/TD]
[TD="align: right"]85.0
[/TD]
[/TR]
[TR]
[TD]May
[/TD]
[TD="align: right"]6.31
[/TD]
[TD="align: right"]196
[/TD]
[TD="align: right"]4.06
[/TD]
[TD="align: right"]126
[/TD]
[/TR]
[TR]
[TD]Jun
[/TD]
[TD="align: right"]6.96
[/TD]
[TD="align: right"]209
[/TD]
[TD="align: right"]4.49
[/TD]
[TD="align: right"]135
[/TD]
[/TR]
[TR]
[TD]Jul
[/TD]
[TD="align: right"]6.38
[/TD]
[TD="align: right"]198
[/TD]
[TD="align: right"]4.18
[/TD]
[TD="align: right"]130
[/TD]
[/TR]
[TR]
[TD]Aug
[/TD]
[TD="align: right"]4.58
[/TD]
[TD="align: right"]142
[/TD]
[TD="align: right"]3.10
[/TD]
[TD="align: right"]96.1
[/TD]
[/TR]
[TR]
[TD]Sep
[/TD]
[TD="align: right"]2.47
[/TD]
[TD="align: right"]74.0
[/TD]
[TD="align: right"]1.86
[/TD]
[TD="align: right"]55.9
[/TD]
[/TR]
[TR]
[TD]Oct
[/TD]
[TD="align: right"]1.22
[/TD]
[TD="align: right"]37.8
[/TD]
[TD="align: right"]0.92
[/TD]
[TD="align: right"]28.6
[/TD]
[/TR]
[TR]
[TD]Nov
[/TD]
[TD="align: right"]0.61
[/TD]
[TD="align: right"]18.4
[/TD]
[TD="align: right"]0.52
[/TD]
[TD="align: right"]15.5
[/TD]
[/TR]
[TR]
[TD]Dec
[/TD]
[TD="align: right"]0.42
[/TD]
[TD="align: right"]13.0
[/TD]
[TD="align: right"]0.36
[/TD]
[TD="align: right"]11.2
[/TD]
[/TR]
[TR]
[TD="colspan: 5"][/TD]
[/TR]
[TR]
[TD]Yearly average
[/TD]
[TD="align: right"]3.05
[/TD]
[TD="align: right"]92.8
[/TD]
[TD="align: right"]2.09
[/TD]
[TD="align: right"]63.5
[/TD]
[/TR]
[TR]
[TD]Total for year
[/TD]
[TD="colspan: 2, align: right"]1110
[/TD]
[TD="colspan: 2, align: right"]762
[/TD]
[/TR]
[/TABLE]


[TABLE="class: data_table"]
[TR]
[TD="colspan: 5"]Fixed system: inclination=30°, orientation=0° (SOUTH-FACING ARRAY)
[/TD]
[/TR]
[TR]
[TH="align: left"]Month
[/TH]
[TH]E[SUB]d[/SUB]
[/TH]
[TH="width: 40"]E[SUB]m[/SUB]
[/TH]
[TH="width: 40"]H[SUB]d[/SUB]
[/TH]
[TH="width: 40"]H[SUB]m[/SUB]
[/TH]
[/TR]
[TR]
[TD]Jan
[/TD]
[TD="align: right"]2.16
[/TD]
[TD="align: right"]67.1
[/TD]
[TD="align: right"]1.31
[/TD]
[TD="align: right"]40.5
[/TD]
[/TR]
[TR]
[TD]Feb
[/TD]
[TD="align: right"]3.53
[/TD]
[TD="align: right"]98.8
[/TD]
[TD="align: right"]2.16
[/TD]
[TD="align: right"]60.5
[/TD]
[/TR]
[TR]
[TD]Mar
[/TD]
[TD="align: right"]5.26
[/TD]
[TD="align: right"]163
[/TD]
[TD="align: right"]3.29
[/TD]
[TD="align: right"]102
[/TD]
[/TR]
[TR]
[TD]Apr
[/TD]
[TD="align: right"]7.40
[/TD]
[TD="align: right"]222
[/TD]
[TD="align: right"]4.78
[/TD]
[TD="align: right"]143
[/TD]
[/TR]
[TR]
[TD]May
[/TD]
[TD="align: right"]8.00
[/TD]
[TD="align: right"]248
[/TD]
[TD="align: right"]5.27
[/TD]
[TD="align: right"]163
[/TD]
[/TR]
[TR]
[TD]Jun
[/TD]
[TD="align: right"]7.96
[/TD]
[TD="align: right"]239
[/TD]
[TD="align: right"]5.34
[/TD]
[TD="align: right"]160
[/TD]
[/TR]
[TR]
[TD]Jul
[/TD]
[TD="align: right"]7.61
[/TD]
[TD="align: right"]236
[/TD]
[TD="align: right"]5.13
[/TD]
[TD="align: right"]159
[/TD]
[/TR]
[TR]
[TD]Aug
[/TD]
[TD="align: right"]6.82
[/TD]
[TD="align: right"]212
[/TD]
[TD="align: right"]4.57
[/TD]
[TD="align: right"]142
[/TD]
[/TR]
[TR]
[TD]Sep
[/TD]
[TD="align: right"]6.04
[/TD]
[TD="align: right"]181
[/TD]
[TD="align: right"]3.94
[/TD]
[TD="align: right"]118
[/TD]
[/TR]
[TR]
[TD]Oct
[/TD]
[TD="align: right"]4.26
[/TD]
[TD="align: right"]132
[/TD]
[TD="align: right"]2.70
[/TD]
[TD="align: right"]83.7
[/TD]
[/TR]
[TR]
[TD]Nov
[/TD]
[TD="align: right"]2.81
[/TD]
[TD="align: right"]84.2
[/TD]
[TD="align: right"]1.72
[/TD]
[TD="align: right"]51.6
[/TD]
[/TR]
[TR]
[TD]Dec
[/TD]
[TD="align: right"]1.99
[/TD]
[TD="align: right"]61.8
[/TD]
[TD="align: right"]1.20
[/TD]
[TD="align: right"]37.2
[/TD]
[/TR]
[TR]
[TD="colspan: 5"][/TD]
[/TR]
[TR]
[TD]Yearly average
[/TD]
[TD="align: right"]5.33
[/TD]
[TD="align: right"]162
[/TD]
[TD="align: right"]3.46
[/TD]
[TD="align: right"]105
[/TD]
[/TR]
[TR]
[TD]Total for year
[/TD]
[TD="colspan: 2, align: right"]1940
[/TD]
[TD="colspan: 2, align: right"]1260
[/TD]
[/TR]
[/TABLE]

 

[infinity]

Ok,

so for the month of July the system produced 409Kw/H and at its highest point in one day peaked at 17.6Kw/Hrs in one Day!

Only 3Kw/Hrs behind my south-south east facing 3.5Kw system!

 

[whinmoor]

Did you undersize the inverter? Which one did you use?

 

[infinity]

No, it's a 3600 solar edge inverter!

 

[puddy]

The most I get for just off south roof with 12 panels and a Fronius ig30 inverter. My best day was just under 20kw since it was fitted in May 2012. I am based not far from Spalding

 

[The Solar King]

I think relative irradiance levels and physical topography will make quite a difference. In the flat south you will do far better with this kind of set up than in hilly Scotland. The only north facing system I had seen up here mysteriously disappeared from the roof some months ago!!

 

[FB.]

The most I get for just off south roof with 12 panels and a Fronius ig30 inverter. My best day was just under 20kw since it was fitted in May 2012. I am based not far from Spalding

The best day's generation in 2012 (June 14th) and 2013 (May 27th) from my 3.75kWp ESE-facing, 40-degree pitch-roof system in Cambs was just over 25kWh.

Day length and sun strength is dropping off considerably now we're two months past the longest day; 20kWh is a very good day for me at this time of year, and it looks like today will just about reach that.
The last time I exceeded 20kWh this year was on 01st August, with 21.6. The first day this year to exceed 20kWh was 02nd April.
Last year I first exceeded 20kWh on 30th April with 21.8. The last time in 2012 that I exceeded 20kWh was 31st August with 21.3.

Detailed system stats in my signature.