أمثلة من مجموعة نصية لـ٪ 1
1. There are now PV roof tiles and slates so if you have a builder already replacing your roof, the extra cost of using PV tiles is low.
2. PV is especially worthwhile if your roof is being replaced.
3. So far worldwide installations of PV produce 7,000 megawatts.
4. And guess what, the model has caused PV to take off in the developed nations.
5. The PV provides most electricity in the summer, when the heating isn‘t needed so much.