Solar Panel Installation in South Wales
5.0 kWp
Typical system size
968 kWh/kW
Annual sunshine
28.18p
Electricity rate
52.75p/day
Standing charge
£872
Annual net benefit (median)
Rates from Ofgem 2026Q1. 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):
£908
/year
SA73 (Pembrokeshire)
1051 kWh/kW
Annual net benefit (5 kW):
£908
/year
SA3 (Swansea)
1044 kWh/kW
Annual net benefit (5 kW):
£902
/year
CF7 (Rhondda Cynon Taf)
1043 kWh/kW
Annual net benefit (5 kW):
£901
/year
CF71 (Vale of Glamorgan)
1043 kWh/kW
Annual net benefit (5 kW):
£901
/year
Lower potential areas
Still viable with the right tariff and usage patterns.
SY25 (Ceredigion)
830 kWh/kW
Annual net benefit (5 kW):
£717
/year
SA20 (Carmarthenshire)
863 kWh/kW
Annual net benefit (5 kW):
£746
/year
SA9 (Powys)
873 kWh/kW
Annual net benefit (5 kW):
£754
/year
LD3 (Powys)
876 kWh/kW
Annual net benefit (5 kW):
£756
/year
LD5 (Powys)
878 kWh/kW
Annual net benefit (5 kW):
£759
/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):
£871
CF10
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£871
CF11
Cardiff
Annual sunshine:
1006 kWh/kW
Annual net benefit (5 kW):
£869
CF14
Cardiff
Annual sunshine:
1008 kWh/kW
Annual net benefit (5 kW):
£871
CF15
Cardiff
Annual sunshine:
985 kWh/kW
Annual net benefit (5 kW):
£850
CF2
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£872
CF23
Cardiff
Annual sunshine:
1004 kWh/kW
Annual net benefit (5 kW):
£867
CF24
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£872
CF3
Cardiff
Annual sunshine:
1004 kWh/kW
Annual net benefit (5 kW):
£867
CF30
Cardiff
Annual sunshine:
1004 kWh/kW
Annual net benefit (5 kW):
£867
CF31
Bridgend
Annual sunshine:
1020 kWh/kW
Annual net benefit (5 kW):
£881
CF32
Bridgend
Annual sunshine:
1031 kWh/kW
Annual net benefit (5 kW):
£891
CF33
Bridgend
Annual sunshine:
1033 kWh/kW
Annual net benefit (5 kW):
£892
CF34
Bridgend
Annual sunshine:
922 kWh/kW
Annual net benefit (5 kW):
£796
CF35
Bridgend
Annual sunshine:
1052 kWh/kW
Annual net benefit (5 kW):
£908
CF36
Bridgend
Annual sunshine:
1017 kWh/kW
Annual net benefit (5 kW):
£879
CF37
Rhondda Cynon Taf
Annual sunshine:
940 kWh/kW
Annual net benefit (5 kW):
£812
CF38
Rhondda Cynon Taf
Annual sunshine:
969 kWh/kW
Annual net benefit (5 kW):
£837
CF39
Rhondda Cynon Taf
Annual sunshine:
929 kWh/kW
Annual net benefit (5 kW):
£802
CF4
Cardiff
Annual sunshine:
1013 kWh/kW
Annual net benefit (5 kW):
£875
CF40
Rhondda Cynon Taf
Annual sunshine:
933 kWh/kW
Annual net benefit (5 kW):
£805
CF41
Rhondda Cynon Taf
Annual sunshine:
927 kWh/kW
Annual net benefit (5 kW):
£801
CF42
Rhondda Cynon Taf
Annual sunshine:
884 kWh/kW
Annual net benefit (5 kW):
£763
CF43
Rhondda Cynon Taf
Annual sunshine:
921 kWh/kW
Annual net benefit (5 kW):
£795
CF44
Rhondda Cynon Taf
Annual sunshine:
903 kWh/kW
Annual net benefit (5 kW):
£780
CF45
Rhondda Cynon Taf
Annual sunshine:
898 kWh/kW
Annual net benefit (5 kW):
£776
CF46
Merthyr Tydfil
Annual sunshine:
939 kWh/kW
Annual net benefit (5 kW):
£811
CF47
Merthyr Tydfil
Annual sunshine:
915 kWh/kW
Annual net benefit (5 kW):
£790
CF48
Merthyr Tydfil
Annual sunshine:
899 kWh/kW
Annual net benefit (5 kW):
£777
CF5
Cardiff
Annual sunshine:
1024 kWh/kW
Annual net benefit (5 kW):
£884
CF6
Vale of Glamorgan
Annual sunshine:
1010 kWh/kW
Annual net benefit (5 kW):
£873
CF61
Vale of Glamorgan
Annual sunshine:
1043 kWh/kW
Annual net benefit (5 kW):
£900
CF62
Vale of Glamorgan
Annual sunshine:
1036 kWh/kW
Annual net benefit (5 kW):
£895
CF63
Vale of Glamorgan
Annual sunshine:
1032 kWh/kW
Annual net benefit (5 kW):
£891
CF64
Vale of Glamorgan
Annual sunshine:
1010 kWh/kW
Annual net benefit (5 kW):
£873
CF7
Rhondda Cynon Taf
Annual sunshine:
1043 kWh/kW
Annual net benefit (5 kW):
£901
CF71
Vale of Glamorgan
Annual sunshine:
1043 kWh/kW
Annual net benefit (5 kW):
£901
CF72
Rhondda Cynon Taf
Annual sunshine:
1011 kWh/kW
Annual net benefit (5 kW):
£873
CF8
Caerphilly
Annual sunshine:
988 kWh/kW
Annual net benefit (5 kW):
£854
CF81
Caerphilly
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£808
CF82
Caerphilly
Annual sunshine:
934 kWh/kW
Annual net benefit (5 kW):
£807
CF83
Caerphilly
Annual sunshine:
988 kWh/kW
Annual net benefit (5 kW):
£854
CF91
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£871
CF95
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£872
CF99
Cardiff
Annual sunshine:
1009 kWh/kW
Annual net benefit (5 kW):
£871
HR3
Herefordshire, County of
Annual sunshine:
915 kWh/kW
Annual net benefit (5 kW):
£790
LD1
Powys
Annual sunshine:
902 kWh/kW
Annual net benefit (5 kW):
£779
LD2
Powys
Annual sunshine:
913 kWh/kW
Annual net benefit (5 kW):
£788
LD3
Powys
Annual sunshine:
876 kWh/kW
Annual net benefit (5 kW):
£756
LD4
Powys
Annual sunshine:
903 kWh/kW
Annual net benefit (5 kW):
£780
LD5
Powys
Annual sunshine:
878 kWh/kW
Annual net benefit (5 kW):
£759
LD6
Powys
Annual sunshine:
903 kWh/kW
Annual net benefit (5 kW):
£780
NP1
Caerphilly
Annual sunshine:
1001 kWh/kW
Annual net benefit (5 kW):
£865
NP10
Newport
Annual sunshine:
1002 kWh/kW
Annual net benefit (5 kW):
£865
NP11
Caerphilly
Annual sunshine:
930 kWh/kW
Annual net benefit (5 kW):
£803
NP12
Caerphilly
Annual sunshine:
926 kWh/kW
Annual net benefit (5 kW):
£800
NP13
Blaenau Gwent
Annual sunshine:
933 kWh/kW
Annual net benefit (5 kW):
£806
NP15
Monmouthshire
Annual sunshine:
964 kWh/kW
Annual net benefit (5 kW):
£833
NP16
Monmouthshire
Annual sunshine:
996 kWh/kW
Annual net benefit (5 kW):
£861
NP18
Newport
Annual sunshine:
997 kWh/kW
Annual net benefit (5 kW):
£861
NP19
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£864
NP2
Caerphilly
Annual sunshine:
918 kWh/kW
Annual net benefit (5 kW):
£793
NP20
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£864
NP22
Blaenau Gwent
Annual sunshine:
919 kWh/kW
Annual net benefit (5 kW):
£794
NP23
Blaenau Gwent
Annual sunshine:
922 kWh/kW
Annual net benefit (5 kW):
£796
NP24
Caerphilly
Annual sunshine:
881 kWh/kW
Annual net benefit (5 kW):
£761
NP25
Monmouthshire
Annual sunshine:
954 kWh/kW
Annual net benefit (5 kW):
£824
NP26
Monmouthshire
Annual sunshine:
998 kWh/kW
Annual net benefit (5 kW):
£862
NP3
Blaenau Gwent
Annual sunshine:
928 kWh/kW
Annual net benefit (5 kW):
£801
NP4
Torfaen
Annual sunshine:
966 kWh/kW
Annual net benefit (5 kW):
£834
NP44
Torfaen
Annual sunshine:
971 kWh/kW
Annual net benefit (5 kW):
£839
NP5
Monmouthshire
Annual sunshine:
964 kWh/kW
Annual net benefit (5 kW):
£833
NP6
Monmouthshire
Annual sunshine:
996 kWh/kW
Annual net benefit (5 kW):
£860
NP7
Monmouthshire
Annual sunshine:
939 kWh/kW
Annual net benefit (5 kW):
£811
NP8
Powys
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£823
NP9
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£864
NPT
Newport
Annual sunshine:
1000 kWh/kW
Annual net benefit (5 kW):
£864
SA1
Swansea
Annual sunshine:
982 kWh/kW
Annual net benefit (5 kW):
£848
SA10
Neath Port Talbot
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£807
SA11
Neath Port Talbot
Annual sunshine:
929 kWh/kW
Annual net benefit (5 kW):
£802
SA12
Neath Port Talbot
Annual sunshine:
1006 kWh/kW
Annual net benefit (5 kW):
£869
SA13
Neath Port Talbot
Annual sunshine:
1005 kWh/kW
Annual net benefit (5 kW):
£868
SA14
Carmarthenshire
Annual sunshine:
948 kWh/kW
Annual net benefit (5 kW):
£819
SA15
Carmarthenshire
Annual sunshine:
1006 kWh/kW
Annual net benefit (5 kW):
£869
SA16
Carmarthenshire
Annual sunshine:
1012 kWh/kW
Annual net benefit (5 kW):
£874
SA17
Carmarthenshire
Annual sunshine:
985 kWh/kW
Annual net benefit (5 kW):
£850
SA18
Carmarthenshire
Annual sunshine:
895 kWh/kW
Annual net benefit (5 kW):
£773
SA19
Carmarthenshire
Annual sunshine:
894 kWh/kW
Annual net benefit (5 kW):
£772
SA2
Swansea
Annual sunshine:
988 kWh/kW
Annual net benefit (5 kW):
£853
SA20
Carmarthenshire
Annual sunshine:
863 kWh/kW
Annual net benefit (5 kW):
£746
SA3
Swansea
Annual sunshine:
1044 kWh/kW
Annual net benefit (5 kW):
£902
SA31
Carmarthenshire
Annual sunshine:
957 kWh/kW
Annual net benefit (5 kW):
£827
SA32
Carmarthenshire
Annual sunshine:
950 kWh/kW
Annual net benefit (5 kW):
£820
SA33
Carmarthenshire
Annual sunshine:
992 kWh/kW
Annual net benefit (5 kW):
£857
SA34
Carmarthenshire
Annual sunshine:
995 kWh/kW
Annual net benefit (5 kW):
£859
SA35
Pembrokeshire
Annual sunshine:
915 kWh/kW
Annual net benefit (5 kW):
£790
SA36
Pembrokeshire
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£807
SA37
Pembrokeshire
Annual sunshine:
950 kWh/kW
Annual net benefit (5 kW):
£820
SA38
Carmarthenshire
Annual sunshine:
922 kWh/kW
Annual net benefit (5 kW):
£796
SA39
Carmarthenshire
Annual sunshine:
888 kWh/kW
Annual net benefit (5 kW):
£767
SA4
Swansea
Annual sunshine:
961 kWh/kW
Annual net benefit (5 kW):
£830
SA40
Carmarthenshire
Annual sunshine:
886 kWh/kW
Annual net benefit (5 kW):
£765
SA41
Pembrokeshire
Annual sunshine:
935 kWh/kW
Annual net benefit (5 kW):
£808
SA42
Pembrokeshire
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£823
SA43
Ceredigion
Annual sunshine:
977 kWh/kW
Annual net benefit (5 kW):
£843
SA44
Ceredigion
Annual sunshine:
893 kWh/kW
Annual net benefit (5 kW):
£771
SA45
Ceredigion
Annual sunshine:
909 kWh/kW
Annual net benefit (5 kW):
£785
SA46
Ceredigion
Annual sunshine:
927 kWh/kW
Annual net benefit (5 kW):
£800
SA47
Ceredigion
Annual sunshine:
921 kWh/kW
Annual net benefit (5 kW):
£796
SA48
Ceredigion
Annual sunshine:
888 kWh/kW
Annual net benefit (5 kW):
£767
SA5
Swansea
Annual sunshine:
989 kWh/kW
Annual net benefit (5 kW):
£854
SA6
Swansea
Annual sunshine:
968 kWh/kW
Annual net benefit (5 kW):
£836
SA61
Pembrokeshire
Annual sunshine:
984 kWh/kW
Annual net benefit (5 kW):
£849
SA62
Pembrokeshire
Annual sunshine:
1029 kWh/kW
Annual net benefit (5 kW):
£889
SA63
Pembrokeshire
Annual sunshine:
979 kWh/kW
Annual net benefit (5 kW):
£846
SA64
Pembrokeshire
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£823
SA65
Pembrokeshire
Annual sunshine:
953 kWh/kW
Annual net benefit (5 kW):
£823
SA66
Pembrokeshire
Annual sunshine:
957 kWh/kW
Annual net benefit (5 kW):
£826
SA67
Pembrokeshire
Annual sunshine:
972 kWh/kW
Annual net benefit (5 kW):
£839
SA68
Pembrokeshire
Annual sunshine:
1014 kWh/kW
Annual net benefit (5 kW):
£876
SA69
Pembrokeshire
Annual sunshine:
1014 kWh/kW
Annual net benefit (5 kW):
£875
SA7
Swansea
Annual sunshine:
968 kWh/kW
Annual net benefit (5 kW):
£836
SA70
Pembrokeshire
Annual sunshine:
995 kWh/kW
Annual net benefit (5 kW):
£859
SA71
Pembrokeshire
Annual sunshine:
1039 kWh/kW
Annual net benefit (5 kW):
£898
SA72
Pembrokeshire
Annual sunshine:
1040 kWh/kW
Annual net benefit (5 kW):
£898
SA73
Pembrokeshire
Annual sunshine:
1051 kWh/kW
Annual net benefit (5 kW):
£908
SA8
Neath Port Talbot
Annual sunshine:
888 kWh/kW
Annual net benefit (5 kW):
£767
SA80
Swansea
Annual sunshine:
982 kWh/kW
Annual net benefit (5 kW):
£848
SA9
Powys
Annual sunshine:
873 kWh/kW
Annual net benefit (5 kW):
£754
SA99
Swansea
Annual sunshine:
968 kWh/kW
Annual net benefit (5 kW):
£836
SY25
Ceredigion
Annual sunshine:
830 kWh/kW
Annual net benefit (5 kW):
£717
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