Case Study

These customers had already had a quotation from the company that installed their neighbour's system. However, their neighbour was not satisfied with the quality of installation of his system, which ended up being completely removed and reinstalled, so our customer shopped around and found this website.

Having been told that the roof to the side of the house could only accommodate a 2.4kW system, our customers were pleasantly surprised when we measured the roof and found that by installing them in landscape, we could fit 16 of our 200W solar panels on their roof, totalling 3.2kW.

Wanting to get as close to the top of the tariff tier (4kW), we were asked if more could be fitted. We therefore looked at the front sloping roof of the house, where a further three 200W solar panels could be installed, bringing the total to 3.8kW.

Overview

The house has a south easterly facing tiled roof (40° from south) to its side elevation, and a smaller south westerly facing roof to the front. The pitch of the roof is 30°. The side roof has a flue for a wood burner, and a hipped roof to the right side. The front roof is hipped on the left side, and has a dormer on its right.

The Roof Equipment

As the solar panels were to be spread over two roofs of differing orientation, a system comprising two independent solar arrays was required. An array of sixteen CEEG Caymax 200W solar panels was designed for the side roof, laid out to maximise the available space within the constraints of the shape of the roof.

The second system for the front roof was designed with the solar panels following the shape of the roof.

The Electrical Equipment

We specified an Eversolar TL3200 inverter for the larger array, with a Mastervolt Soladin 600 for the smaller array. These were installed together in a utility cupboard with their respective isolators, as pictured below:



The meter was installed on the wall opposite. In order to allow the customer to monitor the system's total yields, we installed a Wattson wireless energy monitor. The transmitter is the black unit with the two red sensor clips. This allows the customer to monitor the whole system, even though the inverters aren't from the same manufacturer.

Annual Yield

Total annual yield from system = 3128.6kWh, worth around £1622 per year.


Annual yield by month
Here are some more pictures of the finished job: