John Bond House, London

New build social housing project

Objective
To achieve code level 4 CSH across the site

Specific design issues
The design team  was keen to ensure no penetrations were made through the of the roof.

Solution
The single ply roof membrane was used to weld an aluminium rail section to the roof. This formed the frame to which the modules were mounted. The central roof is a sawtooth design orientated  south. The north and south blocks have flat roofs and utilise triangular frames mounted on rails. The modules had to be designed in 2 arrays so that they could be divided into the 2 risers with equal power outputs.

System details
North Riser  14.98kwp
81 x Mitsubishi 185Watt poly-crystalline modules
Inverters – SMA 7000 and Fronius IG plus 100
G59 relay

South Riser  14.75kwp
80 x Mitsubishi 185Watt poly-crystalline modules
Inverters – SMA 7000, SMA SMC 4600 and SMA SB 2500
G59 relay
Total System Output 30kwp

Result
South Facing’s cost effective Solar PV solution was delivered on time and generates an income under the Feed-in Tariff plus the benefit of free electricity to the Housing Association tenants.