GB-Sol has had many of its products MCS listed under the transitional arrangements.
| Product | Transitional Certification Number |
| GBS187 | 008 |
| GBS185 | 009 |
| GBS175 | 010 |
| GBS170 | 011 |
| GBS155 | 012 |
| GBS135 | 013 |
| GBS120 | 014 |
| GBS115 | 015 |
| GBS80 | 016 |
| GBS70 | 017 |
| GBS60 | 018 |
| GBS35 | 019 |
This 'MCS' (Microgeneration Certification Scheme) listing allows the products above to qualify for the upcoming 'Feed-in tarrif' in the UK.
Please request further details