Buying solar that work for you is not so easy with most lures of low cost solar panels are tied to high shipping costs, at RenewSolar we put the prices with the panels to make it simple. We also help with doing the ROI so you know the true value of your purchase.
Solar panels need to be mounted and so we included the cost of mounting the system, that’s the hardware and not the actual installation, but this can vary from place to place and installer to installer – we offer installations.
To mount solar panels you need Hooks and Rails as well as clamps.
Solar panels are clamped to the rails, the rails are bolted to the hooks and the hooks are attached to the joists of the roof under the tiles. Getting to the roof is usually the problem, you need to have scaffolding on most installations which allows safe access to the roof, and a platform to lift the panels to the roof height.
Bifacial solar panels.
It may seem odd to mount bifacial panels on a roof, however there is usually light that passes and bounces on the rear of the panels. Typically you install the panels slightly differently to maximum performance. or they can be used on SolarPergolas ground mount systems and such like.
The Panels come rated under the STC ( standard test conditions) this kits adds 50W per 10%
This is to say that 10% of power gains jumps the panel to 550w, 30% jumps to 650w which can be a little confusing when the panels are listed as 500w.
Panels details:
Size 1.95m x 1.134m These are a little longer than standard panels which are around 1.76m the width is about the same as most panels.
VOC is 44.22 and an array VOC of 265.33 volts with a current of 13.56 amps (STC). You are likely to see up to 3.9kw of power from the array if you are the optimal installation.
NOCT is around 376w to give you a “normal” view of performance which is 2.2kw of power from the array on the average day (not winter days).
ROOF SIZE
This kit should be installed with Gapped panels, this allows the light to bounce behind the panels. Therefore you would need a roof that is 4 meters wide. Due to the length of the panels you would also need a pitch length of 4.6 meters.
This is the size requirements for a two/three layout of portrait solar panels.
For Landscape installation you would need a roof width of 7 meters and a pitch run of 2.6 meters
Other things you may want.
The kit comes with the basics that you need to install a solar array, but to DIY you will need tools which should be obvious, but you may want flashing for the hooks, this all depends on your roof and tile arrangements. (Flashing is around £4. each)
COST:
The kit without installation is around £650.00
Kit with installation will be around £1500.
ROI
Getting Value from solar is very important.
We will run the figures from late March installation time, as this is the “start of the season”
You will average 17.5 kwh per day but nominal power would be 11.4kwh
You would achieve around £2.62 per day and overt the year (solar) you would generate £996.87 of energy
650 / 12 £54.16
996.87 /12 £83.07
First year monthly savings averaged £28. There after £83.07 Savings and costs vary depending on the cost of power, Here I used £0.25 Kwh from the grid.
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