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Thursday 1 October 2020

720 Watt Solar Power System for an shed / summer house /outbuilding

Here are some photos of a 720 Watt solar power system. This can provide LED lighting, charge phones, e-bike batteries, drills and even run power tools and boil a small travel kettle. For more information on how to build your own small solar power system, have a look at this page for dates of workshops.

The system shown here uses 3 x 75 Ah Lead Acid batteries giving a capacity to store a total of 1350 Watt Hours of energy. This could power LED lights, run a TV and internet router and charge phones and laptops. There are 2 panels totaling 150 Watts that are used for charging these batteries.

The image below shows the system wiring with labels. Small loads refer to LED lighting and other devices drawing a maximum of 100 Watts (less than 10 Amps). 



This image here shows the batteries wired in parallel. Note that each battery is fused at 20 Amps, giving a total system current of 60 Amps.



The image below shows the wiring of the panels. Ideally one would use similar power solar panels in parallel to provide more power. In this instance, we have used a 100 Watt and 50 Watt panel as we already had them.




Here are the 2 panels (one 100 watt and the other 50 watts) connected to the roof of the shed.






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