Solar Panel Installation in South Wales
5.0 kWp
Typical system size
968 kWh/kW
Annual sunshine
26.83p
Electricity rate
51.69p/day
Standing charge
£972
Annual net benefit (median)
Rates from Ofgem 2025Q4. Yield data from PVGIS (south-facing, optimal tilt).
Solar potential varies by 27% across South Wales — location matters even within the same region.
Highest solar potential
CF35 (Bridgend)
1052 kWh/kW
Annual net benefit (5 kW):
£880
/year
SA73 (Pembrokeshire)
1051 kWh/kW
Annual net benefit (5 kW):
£880
/year
SA3 (Swansea)
1044 kWh/kW
Annual net benefit (5 kW):
£873
/year
CF7 (Rhondda Cynon Taf)
1043 kWh/kW
Annual net benefit (5 kW):
£873
/year
CF71 (Vale of Glamorgan)
1043 kWh/kW
Annual net benefit (5 kW):
£873
/year
Lower potential areas
Still viable with the right tariff and usage patterns.
SY25 (Ceredigion)
830 kWh/kW
Annual net benefit (5 kW):
£695
/year
SA20 (Carmarthenshire)
863 kWh/kW
Annual net benefit (5 kW):
£722
/year
SA9 (Powys)
873 kWh/kW
Annual net benefit (5 kW):
£731
/year
LD3 (Powys)
876 kWh/kW
Annual net benefit (5 kW):
£733
/year
LD5 (Powys)
878 kWh/kW
Annual net benefit (5 kW):
£735
/year
30% of properties here use oil or LPG heating — ideal candidates for heat pump and solar combinations.
Check your exact costs and payback
Enter your postcode to see personalised calculations for your area.
Enter the first part only (before the space). We’ll take you to your page.
All postcodes in South Wales
Select your postcode area to see exact costs, break-even time, and local installers. Sorted A–Z. Showing 131 postcode areas.
CF1
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
CF10
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
CF11
Cardiff
Annual sunshine:
1006 kWh/kW
Annual net benefit (5 kW):
£842
CF14
Cardiff
Annual sunshine:
1008 kWh/kW
Annual net benefit (5 kW):
£844
CF15
Cardiff
Annual sunshine:
985 kWh/kW
Annual net benefit (5 kW):
£824
CF2
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
CF23
Cardiff
Annual sunshine:
1004 kWh/kW
Annual net benefit (5 kW):
£840
CF24
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
CF3
Cardiff
Annual sunshine:
1004 kWh/kW
Annual net benefit (5 kW):
£840
CF30
Cardiff
Annual sunshine:
1004 kWh/kW
Annual net benefit (5 kW):
£840
CF31
Bridgend
Annual sunshine:
1020 kWh/kW
Annual net benefit (5 kW):
£853
CF32
Bridgend
Annual sunshine:
1031 kWh/kW
Annual net benefit (5 kW):
£863
CF33
Bridgend
Annual sunshine:
1033 kWh/kW
Annual net benefit (5 kW):
£864
CF34
Bridgend
Annual sunshine:
922 kWh/kW
Annual net benefit (5 kW):
£772
CF35
Bridgend
Annual sunshine:
1052 kWh/kW
Annual net benefit (5 kW):
£880
CF36
Bridgend
Annual sunshine:
1017 kWh/kW
Annual net benefit (5 kW):
£851
CF37
Rhondda Cynon Taf
Annual sunshine:
940 kWh/kW
Annual net benefit (5 kW):
£786
CF38
Rhondda Cynon Taf
Annual sunshine:
969 kWh/kW
Annual net benefit (5 kW):
£811
CF39
Rhondda Cynon Taf
Annual sunshine:
929 kWh/kW
Annual net benefit (5 kW):
£777
CF4
Cardiff
Annual sunshine:
1013 kWh/kW
Annual net benefit (5 kW):
£848
CF40
Rhondda Cynon Taf
Annual sunshine:
933 kWh/kW
Annual net benefit (5 kW):
£780
CF41
Rhondda Cynon Taf
Annual sunshine:
927 kWh/kW
Annual net benefit (5 kW):
£776
CF42
Rhondda Cynon Taf
Annual sunshine:
884 kWh/kW
Annual net benefit (5 kW):
£739
CF43
Rhondda Cynon Taf
Annual sunshine:
921 kWh/kW
Annual net benefit (5 kW):
£770
CF44
Rhondda Cynon Taf
Annual sunshine:
903 kWh/kW
Annual net benefit (5 kW):
£755
CF45
Rhondda Cynon Taf
Annual sunshine:
898 kWh/kW
Annual net benefit (5 kW):
£751
CF46
Merthyr Tydfil
Annual sunshine:
939 kWh/kW
Annual net benefit (5 kW):
£786
CF47
Merthyr Tydfil
Annual sunshine:
915 kWh/kW
Annual net benefit (5 kW):
£765
CF48
Merthyr Tydfil
Annual sunshine:
899 kWh/kW
Annual net benefit (5 kW):
£752
CF5
Cardiff
Annual sunshine:
1024 kWh/kW
Annual net benefit (5 kW):
£857
CF6
Vale of Glamorgan
Annual sunshine:
1010 kWh/kW
Annual net benefit (5 kW):
£845
CF61
Vale of Glamorgan
Annual sunshine:
1043 kWh/kW
Annual net benefit (5 kW):
£872
CF62
Vale of Glamorgan
Annual sunshine:
1036 kWh/kW
Annual net benefit (5 kW):
£867
CF63
Vale of Glamorgan
Annual sunshine:
1032 kWh/kW
Annual net benefit (5 kW):
£863
CF64
Vale of Glamorgan
Annual sunshine:
1010 kWh/kW
Annual net benefit (5 kW):
£845
CF7
Rhondda Cynon Taf
Annual sunshine:
1043 kWh/kW
Annual net benefit (5 kW):
£873
CF71
Vale of Glamorgan
Annual sunshine:
1043 kWh/kW
Annual net benefit (5 kW):
£873
CF72
Rhondda Cynon Taf
Annual sunshine:
1011 kWh/kW
Annual net benefit (5 kW):
£845
CF8
Caerphilly
Annual sunshine:
988 kWh/kW
Annual net benefit (5 kW):
£827
CF81
Caerphilly
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£782
CF82
Caerphilly
Annual sunshine:
934 kWh/kW
Annual net benefit (5 kW):
£781
CF83
Caerphilly
Annual sunshine:
988 kWh/kW
Annual net benefit (5 kW):
£827
CF91
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
CF95
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
CF99
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£844
HR3
Herefordshire, County of
Annual sunshine:
915 kWh/kW
Annual net benefit (5 kW):
£766
LD1
Powys
Annual sunshine:
902 kWh/kW
Annual net benefit (5 kW):
£755
LD2
Powys
Annual sunshine:
913 kWh/kW
Annual net benefit (5 kW):
£764
LD3
Powys
Annual sunshine:
876 kWh/kW
Annual net benefit (5 kW):
£733
LD4
Powys
Annual sunshine:
903 kWh/kW
Annual net benefit (5 kW):
£755
LD5
Powys
Annual sunshine:
878 kWh/kW
Annual net benefit (5 kW):
£735
LD6
Powys
Annual sunshine:
903 kWh/kW
Annual net benefit (5 kW):
£755
NP1
Caerphilly
Annual sunshine:
1001 kWh/kW
Annual net benefit (5 kW):
£838
NP10
Newport
Annual sunshine:
1002 kWh/kW
Annual net benefit (5 kW):
£838
NP11
Caerphilly
Annual sunshine:
930 kWh/kW
Annual net benefit (5 kW):
£778
NP12
Caerphilly
Annual sunshine:
926 kWh/kW
Annual net benefit (5 kW):
£775
NP13
Blaenau Gwent
Annual sunshine:
933 kWh/kW
Annual net benefit (5 kW):
£780
NP15
Monmouthshire
Annual sunshine:
964 kWh/kW
Annual net benefit (5 kW):
£807
NP16
Monmouthshire
Annual sunshine:
996 kWh/kW
Annual net benefit (5 kW):
£834
NP18
Newport
Annual sunshine:
997 kWh/kW
Annual net benefit (5 kW):
£834
NP19
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£837
NP2
Caerphilly
Annual sunshine:
918 kWh/kW
Annual net benefit (5 kW):
£768
NP20
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£837
NP22
Blaenau Gwent
Annual sunshine:
919 kWh/kW
Annual net benefit (5 kW):
£769
NP23
Blaenau Gwent
Annual sunshine:
922 kWh/kW
Annual net benefit (5 kW):
£772
NP24
Caerphilly
Annual sunshine:
881 kWh/kW
Annual net benefit (5 kW):
£737
NP25
Monmouthshire
Annual sunshine:
954 kWh/kW
Annual net benefit (5 kW):
£798
NP26
Monmouthshire
Annual sunshine:
998 kWh/kW
Annual net benefit (5 kW):
£835
NP3
Blaenau Gwent
Annual sunshine:
928 kWh/kW
Annual net benefit (5 kW):
£776
NP4
Torfaen
Annual sunshine:
966 kWh/kW
Annual net benefit (5 kW):
£808
NP44
Torfaen
Annual sunshine:
971 kWh/kW
Annual net benefit (5 kW):
£812
NP5
Monmouthshire
Annual sunshine:
964 kWh/kW
Annual net benefit (5 kW):
£807
NP6
Monmouthshire
Annual sunshine:
996 kWh/kW
Annual net benefit (5 kW):
£834
NP7
Monmouthshire
Annual sunshine:
939 kWh/kW
Annual net benefit (5 kW):
£785
NP8
Powys
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£797
NP9
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£837
NPT
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£837
SA1
Swansea
Annual sunshine:
982 kWh/kW
Annual net benefit (5 kW):
£822
SA10
Neath Port Talbot
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£782
SA11
Neath Port Talbot
Annual sunshine:
929 kWh/kW
Annual net benefit (5 kW):
£777
SA12
Neath Port Talbot
Annual sunshine:
1006 kWh/kW
Annual net benefit (5 kW):
£842
SA13
Neath Port Talbot
Annual sunshine:
1005 kWh/kW
Annual net benefit (5 kW):
£841
SA14
Carmarthenshire
Annual sunshine:
948 kWh/kW
Annual net benefit (5 kW):
£793
SA15
Carmarthenshire
Annual sunshine:
1006 kWh/kW
Annual net benefit (5 kW):
£841
SA16
Carmarthenshire
Annual sunshine:
1012 kWh/kW
Annual net benefit (5 kW):
£847
SA17
Carmarthenshire
Annual sunshine:
985 kWh/kW
Annual net benefit (5 kW):
£824
SA18
Carmarthenshire
Annual sunshine:
895 kWh/kW
Annual net benefit (5 kW):
£749
SA19
Carmarthenshire
Annual sunshine:
894 kWh/kW
Annual net benefit (5 kW):
£748
SA2
Swansea
Annual sunshine:
988 kWh/kW
Annual net benefit (5 kW):
£827
SA20
Carmarthenshire
Annual sunshine:
863 kWh/kW
Annual net benefit (5 kW):
£722
SA3
Swansea
Annual sunshine:
1044 kWh/kW
Annual net benefit (5 kW):
£873
SA31
Carmarthenshire
Annual sunshine:
957 kWh/kW
Annual net benefit (5 kW):
£801
SA32
Carmarthenshire
Annual sunshine:
950 kWh/kW
Annual net benefit (5 kW):
£795
SA33
Carmarthenshire
Annual sunshine:
992 kWh/kW
Annual net benefit (5 kW):
£830
SA34
Carmarthenshire
Annual sunshine:
995 kWh/kW
Annual net benefit (5 kW):
£832
SA35
Pembrokeshire
Annual sunshine:
915 kWh/kW
Annual net benefit (5 kW):
£765
SA36
Pembrokeshire
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£782
SA37
Pembrokeshire
Annual sunshine:
950 kWh/kW
Annual net benefit (5 kW):
£795
SA38
Carmarthenshire
Annual sunshine:
922 kWh/kW
Annual net benefit (5 kW):
£771
SA39
Carmarthenshire
Annual sunshine:
888 kWh/kW
Annual net benefit (5 kW):
£743
SA4
Swansea
Annual sunshine:
961 kWh/kW
Annual net benefit (5 kW):
£804
SA40
Carmarthenshire
Annual sunshine:
886 kWh/kW
Annual net benefit (5 kW):
£741
SA41
Pembrokeshire
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£782
SA42
Pembrokeshire
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£797
SA43
Ceredigion
Annual sunshine:
977 kWh/kW
Annual net benefit (5 kW):
£817
SA44
Ceredigion
Annual sunshine:
893 kWh/kW
Annual net benefit (5 kW):
£747
SA45
Ceredigion
Annual sunshine:
909 kWh/kW
Annual net benefit (5 kW):
£761
SA46
Ceredigion
Annual sunshine:
927 kWh/kW
Annual net benefit (5 kW):
£775
SA47
Ceredigion
Annual sunshine:
921 kWh/kW
Annual net benefit (5 kW):
£771
SA48
Ceredigion
Annual sunshine:
888 kWh/kW
Annual net benefit (5 kW):
£743
SA5
Swansea
Annual sunshine:
989 kWh/kW
Annual net benefit (5 kW):
£827
SA6
Swansea
Annual sunshine:
968 kWh/kW
Annual net benefit (5 kW):
£810
SA61
Pembrokeshire
Annual sunshine:
984 kWh/kW
Annual net benefit (5 kW):
£823
SA62
Pembrokeshire
Annual sunshine:
1029 kWh/kW
Annual net benefit (5 kW):
£861
SA63
Pembrokeshire
Annual sunshine:
979 kWh/kW
Annual net benefit (5 kW):
£819
SA64
Pembrokeshire
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£797
SA65
Pembrokeshire
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£797
SA66
Pembrokeshire
Annual sunshine:
957 kWh/kW
Annual net benefit (5 kW):
£800
SA67
Pembrokeshire
Annual sunshine:
972 kWh/kW
Annual net benefit (5 kW):
£813
SA68
Pembrokeshire
Annual sunshine:
1014 kWh/kW
Annual net benefit (5 kW):
£849
SA69
Pembrokeshire
Annual sunshine:
1014 kWh/kW
Annual net benefit (5 kW):
£848
SA7
Swansea
Annual sunshine:
968 kWh/kW
Annual net benefit (5 kW):
£810
SA70
Pembrokeshire
Annual sunshine:
995 kWh/kW
Annual net benefit (5 kW):
£832
SA71
Pembrokeshire
Annual sunshine:
1039 kWh/kW
Annual net benefit (5 kW):
£870
SA72
Pembrokeshire
Annual sunshine:
1040 kWh/kW
Annual net benefit (5 kW):
£870
SA73
Pembrokeshire
Annual sunshine:
1051 kWh/kW
Annual net benefit (5 kW):
£880
SA8
Neath Port Talbot
Annual sunshine:
888 kWh/kW
Annual net benefit (5 kW):
£743
SA80
Swansea
Annual sunshine:
982 kWh/kW
Annual net benefit (5 kW):
£822
SA9
Powys
Annual sunshine:
873 kWh/kW
Annual net benefit (5 kW):
£731
SA99
Swansea
Annual sunshine:
968 kWh/kW
Annual net benefit (5 kW):
£810
SY25
Ceredigion
Annual sunshine:
830 kWh/kW
Annual net benefit (5 kW):
£695
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