Short answerFor most Telangana homes in 2026, DCR Mono PERC or TOPCon panels are the right choice. TOPCon costs slightly more but produces more in heat and lasts with less degradation. Bifacial panels help on raised structures with a light-coloured roof underneath. Polycrystalline panels are now mostly outdated.
The main technologies
| Type | Typical efficiency | Heat performance | Best for |
|---|---|---|---|
| Polycrystalline | 15–17% | Weaker | Very tight budgets, large free space |
| Mono PERC | 20–21.5% | Good | Most homes, best value |
| TOPCon (n-type) | 22–23% | Better | Hot roofs, limited space |
| Bifacial (PERC or TOPCon) | +5–15% from rear side | Good | Raised structures, white roofs |
Why heat matters here
Panels are rated at 25°C. On a May afternoon in Telangana, panel surface temperature can cross 65°C, and output drops by the temperature coefficient for every degree. A panel losing 0.30% per °C beats one losing 0.35% per °C by a few percent every summer day.
DCR and the subsidy
Only panels with Indian-made cells, listed under the government’s approved list, qualify for PM Surya Ghar. Always ask for the DCR certificate with the panel serial numbers.
What we use
We install Tier-1 DCR modules from Waaree, Adani and Tata in Mono PERC and TOPCon, and recommend based on your roof, shading and budget.
Frequently asked questions
Which panel is best for hot climates?
Panels with a lower temperature coefficient lose less output in heat. TOPCon and HJT panels typically perform better than Mono PERC in Telangana summers.
What is a DCR panel?
DCR (Domestic Content Requirement) panels use solar cells made in India. Only DCR panels qualify for the PM Surya Ghar subsidy.
Are polycrystalline panels still worth buying?
Rarely. They are less efficient and need more roof space for the same output. Most makers have moved to mono technologies.