EIR - Solar Together [Sep 2026]

I am writing to request information under the Freedom of Information Act 2000 regarding your Solar Together group-buying scheme.
 

1. The year the scheme was first launched locally, and the number of rounds run to date.
    
2. For each round, broken down by year: the number of households that registered, and the number that proceeded to an actual installation.
    
3. For each round: the average discount or saving achieved, and the total installed capacity (kW). This is typically included in the round summary iChoosr provides to the council, so a copy of that document would answer this fully if easier than compiling fresh figures.

Our response

1. The Solar Together London (STL) programme was launched in 2018 and has gone through five phases.

2. The table below includes the data requested, split by phase. We do not have it by year. 

   Phase	Registrations	Installations
   1	3,665	290
   2	5,062	330
   3	6,736	359
   4	24,672	1,150
   5	32,195	1,102
   Total	72,330	3,231

3. The table below includes the total installed capacity. The closest we have to the average discount by installer is for phases 3-5: ‘householders have been able to get 20-30 per cent reductions on the cost of measures’. 

   Phase	Estimated Installed Capacity (kWp)
   1	698
   2	795
   3	865
   4	2,120
   5	3,123
   Total	7,600