MENU
Solar panel efficiency has improved considerably over the years, but even high-performance modules struggle when real-world conditions interfere with electricity generation. Shading, dirt, and uneven cell degradation can reduce output across entire sections of a panel. San Francisco-based Optivolt believes the next major improvement in solar performance lies not in the cells themselves, but in how electricity is managed inside the module.
The company has secured $32 million in Series A funding to scale its Power Balancer technology, which integrates active power electronics directly into solar panels.
For eeNews Europe readers, the development points to a different approach to photovoltaic system design. Rather than relying on external optimizers to compensate for power losses, Optivolt is moving power management inside the panel, with implications for efficiency, system architecture, and installation costs.
In conventional photovoltaic modules, cells are connected in groups. When one cell underperforms because of shading or contamination, it can limit the output of other cells in the same group. Bypass diodes protect the circuit but can effectively remove entire sections from power generation.
Optivolt’s Power Balancer addresses this limitation by actively redistributing energy among cell groups as conditions change.
The electronics replace conventional bypass diodes while incorporating monitoring and rapid shutdown capabilities. According to the company, this architecture can eliminate the need for separate module-level optimizers, microinverters, and rapid-shutdown devices in certain system designs.
The challenge is making such electronics efficient and durable enough to operate inside a solar module for decades.
Optivolt turned to engineers experienced in satellite power systems to address thermal management and long-term reliability. The resulting Power Balancer achieves 99.4% conversion efficiency under typical operating conditions, according to the company.
Optivolt reports that panels equipped with its technology generated up to six times more power than panels using external optimizers in internal tests conducted under defined shading scenarios.
While the results do not represent typical gains across all operating conditions, they illustrate the potential impact of managing electrical mismatches closer to their source.
“Solar became cheap enough to compete. I founded Optivolt to make it intelligent enough to power the world,” said Rohit Kalyanpur, founder and CEO of Optivolt.
The company has spent nine years developing the technology and holds 19 issued patents, with another 27 applications pending. It has also obtained UL certifications covering its integrated electronics, enclosure, rapid shutdown, and module safety.
The $32 million round was led by VXI Capital, with participation from RA Capital, Valo Ventures, and Atlas Innovate. Total funding now stands at $42 million.
More than 20,000 panels incorporating the Power Balancer have already shipped. Optivolt intends to use the new investment to expand manufacturing and reach applications ranging from residential rooftops to utility-scale installations.
The company is also targeting large solar projects intended to supply electricity to AI data centers, where demand for reliable power continues to shape infrastructure investment.
With investors including former Enphase CEO Paul Nahi and former SunPower CEO Tom Werner, Optivolt is positioning panel-integrated electronics as a potential next step in photovoltaic technology.
Its central argument is straightforward: improving the solar cell is only part of the equation. Recovering more of the electricity that cells already generate could be just as important. 
All material on this site Copyright © 2026 European Business Press SA. All rights reserved.

source