Optivolt Raises $32 Million to Scale Smart Solar Panels with Integrated Power Electronics

US solar technology company Optivolt has raised $32 million in Series A funding to expand manufacturing of its Power Balancer technology, which integrates active power electronics directly into solar panels to improve electricity generation under changing environmental conditions. Announced on 21 October 2026, the financing was led by VXI Capital, with participation from RA Capital, Valo Ventures and Atlas Innovate, bringing the company's total funding to $42 million.

Founded by Rohit Kalyanpur, Optivolt has spent nine years developing technology intended to address electricity losses caused by shading, dirt, weather conditions and uneven degradation of solar cells. The company has already shipped more than 20,000 panels incorporating its Power Balancer and plans to expand deployment across residential, commercial and utility-scale solar projects, including facilities supporting AI data centres.

 

Power Balancer Technology Targets Solar Energy Losses

 

Conventional solar panels are designed to operate efficiently under standard testing conditions, but real-world performance can decline when individual cells experience shading, soiling or degradation. Within a panel, the performance of an underperforming cell can restrict electricity output from a larger group of connected cells. Conventional bypass diodes can help manage these conditions, but they may also remove affected sections from electricity production, reducing overall energy yield.

Optivolt's Power Balancer addresses these limitations by redistributing electrical power between groups of cells within the panel in real time. The technology replaces conventional bypass diodes with an active power management system capable of responding to changing conditions. It also incorporates monitoring and rapid-shutdown functionality, potentially reducing the need for separate module-level power optimisers and other external electrical components in certain system configurations.

 

Read more: Rabot Energy Raises $50 Million to Connect German Homes into a Virtual Power Plant

 

Power Electronics Designed for Efficiency and Long-Term Reliability

 

According to Optivolt, the Power Balancer achieves 99.4% power conversion efficiency under typical operating conditions. This figure refers to the efficiency of the integrated power electronics rather than the sunlight-to-electricity conversion efficiency of the solar panel itself. The company says its architecture was developed with input from engineers experienced in satellite power systems, where managing heat and maintaining electrical reliability are essential.

Integrating active electronics into a solar panel introduces additional engineering requirements, particularly around heat dissipation and long-term component durability. Optivolt reports holding 19 issued patents, with another 27 patent applications pending. The company has also obtained UL certifications covering its integrated junction-box enclosure, panel-integrated electronics, rapid-shutdown system and solar-module safety. These certifications support the technology's commercial readiness, although long-term operating reliability will depend on performance across different installation environments.

 

Internal Testing Reports Major Gains Under Shaded Conditions

 

Optivolt reports that panels incorporating its technology generated up to six times as much power as panels using externally attached optimisers under specific shading conditions during internal testing. The result suggests that managing electrical losses within individual cell groups could improve electricity generation when parts of a panel are shaded or operating unevenly.

However, the performance improvement should not be interpreted as a sixfold increase in electricity generation under normal operating conditions. The result comes from defined internal test scenarios, and the company has not disclosed independently verified annual energy yield improvements across commercial solar installations. Demonstrating consistent performance under different weather conditions, shading patterns and operating temperatures will be important in assessing the technology's wider commercial value.

 

Explore OneStop ESG Marketplace: Renewable & clean energy generation

 

Series A Funding Supports Manufacturing and Market Expansion

 

The financing will help Optivolt expand manufacturing and bring its integrated power electronics to a wider range of solar installations. The company intends to serve residential rooftops, commercial buildings and utility-scale developments, including projects designed to supply electricity to AI data centres. Its approach focuses on improving the performance of solar panels themselves rather than relying exclusively on additional external equipment to optimise generation.

Orin Hoffman, Managing Director at VXI Capital, said the investment would help Optivolt move from technology development towards wider commercial deployment. Paul Nahi, founding CEO of Enphase and an Optivolt investor, highlighted the shift from managing electricity at the output of individual panels towards integrating power electronics within the module. While more than 20,000 panels incorporating the technology have already been shipped, Optivolt has not disclosed its annual manufacturing capacity, commercial revenue or a timetable for its next production expansion.

 

Improving Solar Economics Through Higher Lifetime Energy Yield

 

The technology's commercial potential extends beyond increasing instantaneous electricity output. Solar project economics depend on the amount of electricity generated over an installation's operating lifetime relative to its development, equipment and maintenance costs. Improving energy recovery during shading and degradation could increase total generation from an existing installation area, potentially lowering the cost of electricity.

Tom Werner, former CEO of SunPower and an Optivolt investor, emphasised the importance of improving actual electricity generation after panels leave the factory. Richard Kauffman, former Chairman of Energy and Finance for New York and another investor, also highlighted the potential financial value of generating more electricity from the same solar infrastructure. However, the economic benefits will depend on the additional cost of integrated electronics, long-term reliability and the performance gains achieved under real-world conditions.

Optivolt's latest funding positions the company to expand a technology that could improve solar panel performance without requiring additional land or generation capacity. Its 20,000-plus shipped panels provide an initial commercial base, while the reported internal testing results indicate potential advantages in challenging operating environments.

The next phase will be demonstrating measurable improvements in annual electricity generation, installation economics and long-term system performance as manufacturing expands. If these benefits can be verified at commercial scale, panel-integrated power management could offer solar developers another way to increase energy output and improve the competitiveness of renewable electricity.