Solid Solar commissions 20 MW TOPCon plant on Uttarakhand hillside

Solid Solar has commissioned a 20 MWp solar plant in Malna/Patara village, Uttarkashi, Uttarakhand, India. The project is situated on a single hill at an elevation exceeding 5,000 feet above sea level. For the installation, the company utilized Gautam Solar n-type TOPCon bifacial modules.

Engineering the impossible

Building a solar plant on a steep, rocky Himalayan hillside presents distinct logistical hurdles. The remote location in Uttarkashi features limited accessibility and a harsh climate, while wildlife poses additional risks to construction crews and equipment. To navigate the uneven terrain, Solid Solar employed 3D hill modeling to determine precise module and structure placement. This digital mapping allowed the design and site teams to plan the placement of modules and supporting structures according to the actual contours.

Transporting materials to such an elevation without conventional roads required a combination of specialized methods. The team utilized a ropeway, a controlled sliding mechanism, and a chain-link system to move heavy components up the incline. For items that could not be mechanized, mules served as the final link in the supply chain. On the ground, workers abandoned conventional heavy machinery in favor of portable handheld equipment for foundation work, a necessity dictated by the unstable, rocky substrate.

Industry reaction

Mukesh Agrawal, the Managing Director of Solid Solar, highlighted the operational launch of the 20 MWp solar PV facility in Malna/Patara village as a significant achievement for the firm. Gautam Mohanka, head of Gautam Solar, observed that the Uttarkashi site illustrates the capacity of sophisticated solar systems to function effectively within difficult terrain. According to available reports, the facility's output is said to exceed that of other solar projects in the region.

Market context

The commissioning of this hillside plant coincides with a period of softening prices for the specific cell technology employed. Luminity reported on 16 October that post-Golden Week pricing saw TOPCon components adjust downward. The following table details the benchmarks recorded as of 13 October 2026:

Component	Benchmark Price	Change
TOPCon Modules (OPIS CMM)	$0.107/W	—
TOPCon M10 Cells (FOB China)	$0.0463/W	-0.86%
TOPCon 210R Cells (FOB China)	$0.0454/W	-0.66%

These figures reflect the prevailing market rate for the n-type TOPCon bifacial modules installed at the Malna/Patara site.

Technology trends

• JinkoSolar disclosed its TAC technology on 17 October, featuring a back-contact TOPCon cell design that employs amorphous silicon passivation, as detailed in an earlier Luminity report.
• On 27 October, Shakti Pumps (India) Ltd introduced a 620 Wp TOPCon module built with a 16-busbar architecture, a development discussed in a previous Luminity report.

Foundation and logistics specifics

To anchor columns on the rugged hillside, Solid Solar modified chemical grouting, a method typically linked to rooftop solar installs, to match the site's unique conditions. The firm highlighted that depending exclusively on manual labor or a standard ropeway would have led to significantly increased expenses and extended schedules. Therefore, in areas where the ropeway was impractical, crews utilized smaller, tailored approaches. Mukesh Agrawal, Managing Director of Solid Solar, remarked that these straightforward fixes were vital for maintaining construction momentum across landscapes where standard logistics failed.

What to watch

With no specific project cost or construction timeline provided in the available details, immediate next steps remain undefined.