WW2 Bunker Job
We received an enquiry from a customer who ran a business that provides outdoor pursuits for businesses who send their employees on motivational courses. They purchased a site in the same location as England’s football club in the north of England, which is also part of an airfield that was used in the Second World War. The site include WW2 bunkers that were constructed to withstand bombing raids by the Luftwaffe decided it would be a good idea to convert the disused bunkers into a prep room for laser gun themed game. There was no electricity supply and asked us to design a solar system that could be used to provide lights and charge up the laser guns. Also had a problem with the Local Authorities to obtain planning permission and asked if we could help. Select Solar Limited designed a system that was accepted by the local planning team and they then booked us to carry out the installation.
Colin and Jacques worked on installing the 9 panels mounted on the roof, as the roof was flat there was only a slight angle therefore; we laid L brackets on top of wood firings which increased the angle to at least 5 degrees.
The objective was to create enough falls for the rain to run off. We attached rails along the firings onto L brackets, creating as much angle as possible. Once the rails were in place, we mounted the panels and secured with mid and end clamps. We were not allowed to penetrate the roof as there was special material meant to withstand bombs being dropped so we used lateral straps which were attached to the side of the bunker securing the panels.
Whilst Colin and Jacques were fixing the panels, Marcin was inside mounting the charge controller, inverter and batteries. As the laser guns required a 240V supply we sized an inverter to provide 2 double sockets. The charge controller was sized to the 9 panels and fed the 4 x 210Ah AGM batteries which were wired 2 in series and 2 in parallel. This created 420Ah at 24V, which was then fed into the inverter which powered the sockets.
The lighting was managed by a Solar Hub 64. This included 4 LED strips, a hub unit which stored the energy and a 20w panel. The hub unit was mounted near the entrance to allow for easy access to switch on or off and the panel was mounted just outside the door for less shading and minimal distance to the hub unit. The LED strips were placed within the center of the bunker to allow for maximum light coverage and all connected to the hub unit.
The customer was delighted with the install and took a whole season of bookings for their laser gun games.
Our Gallery of the installation
For and on behalf of Select Solar Limited