Source google image: https://previews.123rf.com/images/ahavelaar/ahavelaar1508/ahavelaar150800002/43540551-gros-plan-d-un-motif-%C3%A9chiquier-de-panneaux-solaires-rapproch%C3%A9s.jpg
Motif panneau solaire
Source google image: https://previews.123rf.com/images/ahavelaar/ahavelaar1508/ahavelaar150800002/43540551-gros-plan-d-un-motif-%C3%A9chiquier-de-panneaux-solaires-rapproch%C3%A9s.jpg