In GN25, the BREEAM best practice specification includes an allowance for LZC technologies represented as a proxy, by the inclusion of roof-mounted photovoltaic panels. An allowance for on-site electrical generation should be the lesser of either:
- 5.3% x Gross Internal Area x 120 kWh/m2
- 50% x roof area x 120 kWh/m2
In all cases, the BREEAM best practice specification must include PV as stated, regardless of whether the actual building has PV specified.
