Commercial offers are full of acronyms: N-type, TOPCon, half-cut, bifacial. Here is a plain explanation of which ones actually affect your plant and which just sound impressive.
N-type and P-type
This is the type of silicon the cells are made from. N-type panels lose power more slowly over the years and work better in the heat. Most quality modules on the market today are N-type, and we recommend them for any new plant.
TOPCon, HJT and PERC
- PERC is a proven but older technology. Cheaper, but less efficient than newer ones.
- TOPCon is today's standard: high efficiency, good behaviour in the heat, a reasonable price. The best choice for most roofs in Ukraine.
- HJT heterojunction modules have the best temperature coefficient. They cost more and make sense where every square metre of roof counts.
Half-cut and glass-glass
Half-cut means the cells are cut in two. This reduces losses and makes the panel more tolerant of partial shade. A glass-glass build protects the cells on both sides and lasts longer than a classic back sheet.
Bifacial panels
Bifacial modules also collect light on their back. Over a bright surface such as gravel, concrete or snow this adds noticeable output. On a pitched metal roof the effect is small; on ground-mounted plants and flat roofs they pay off better.
What to check on the datasheet
- Module efficiency: 21–23% for modern panels.
- Product warranty (12–15 years or more) and power warranty (usually 25–30 years).
- Temperature coefficient: the closer to zero, the less the panel loses in the heat.
- A Tier 1 manufacturer and IEC certificates.
We work with Grade A modules and explain in every offer why we chose those panels for your roof.