What actually decides the price per kW
Two quotations for the same capacity can differ by a wide margin, and the difference is almost never arbitrary. Module technology and wattage, inverter brand and topology, mounting structure height, cable length between array and inverter, earthing and lightning protection, and the amount of civil work needed all move the figure. A low quote that omits elevated structure or proper DC protection is not cheaper — it is incomplete.
- Module type — DCR versus non-DCR, mono PERC versus TOPCon
- Inverter selection — string inverter capacity, brand and warranty term
- Structure — standard, elevated or walkway-integrated on the terrace
- Cabling, earthing, SPD and AC/DC distribution boxes
- Net metering, DISCOM liaison and application charges

