In recent years, the U.S. solar and energy storage industries have experienced a dramatic shift: a growing portion of the global supply chain is now being built on American soil. According to the Solar Energy Industries Association (SEIA), new federal incentives have fueled significant investment in domestic manufacturing.
This reshoring effort has far-reaching implications: it boosts energy security, supports U.S. jobs, and helps reduce reliance on overseas suppliers. Here’s a closer look at SEIA’s supply chain data and what it means for the future of clean energy in America.
U.S. manufacturing boom: Key stats & trends
$45.8 billion invested, tens of thousands of jobs
- Since federal manufacturing policies passed in 2022, $45.8 billion in solar manufacturing investments have been announced.
- These investments are expected to create 56,000 manufacturing jobs, with SEIA projecting ~100,000 solar manufacturing workers by 2033.
- To date, there are 102 domestic solar and storage facilities either operating or under construction.
This growth isn’t confined to a few coastal states, manufacturing is expanding across 43 U.S. states and Puerto Rico.
Solar module supply chain: From polysilicon to panels
One of the most significant developments is the expansion of a fully domestic solar module supply chain. SEIA’s dashboard tracks everything from raw materials to final modules.
- Before recent incentives, U.S. polysilicon capacity was limited (~ 50,000 metric tons/year), and module capacity was just 7 GW/year.
- As of mid-2025, SEIA reports that 57.5 GW of module manufacturing capacity is now online, a more than 600% increase.
- SEIA expects more ingot and wafer facilities (critical early-stage components) to come online by the end of 2025.
This means that not only is the U.S. now making more solar panels, it’s also rebuilding every upstream step of the value chain.
Mounting systems: More made in America
Solar racking and mounting components (rails, torque tubes, trackers, and more) are also seeing strong domestic growth:
- SEIA tracks 39 U.S. racking or tracker manufacturing facilities in their dashboard.
- Many of these were enabled by recent tax incentives.
- Given that mounting systems are relatively quick to set up (6–12 months), many of these new facilities are already operating.
- These factories support both rooftop and ground-mount solar markets, and they also boost demand for U.S.-made steel and aluminum.
Power electronics & grid tech: Domestic growth too
The supply chain isn’t just about solar panels, power electronics are also rapidly expanding in the U.S.:
- SEIA reports 21 companies expanding or building manufacturing for inverters, power electronics, transformers, and related grid technologies.
- Among these, there are facilities for hybrid inverters, microinverters, and utility-scale string inverters.
- Several firms are building other “balance of system” components, including wiring, junction boxes, and transformers.
These developments strengthen the domestic supply chain for both solar PV and battery storage systems.
Storage supply chain: Batteries made in America
Perhaps most significantly, energy storage manufacturing in the U.S. is ramping up. SEIA’s dashboard tracks materials, cells, and packs that feed into battery energy storage systems (BESS).
Here’s what the data shows:
- Before the incentives took effect, U.S. battery manufacturing was minimal for stationary storage.
- Since then, investments have expanded midstream processing (anode/cathode materials) and downstream assembly (battery cells, battery packs).
- SEIA projects that by the end of the decade, U.S. active material capacity will reach 557,750 metric tons.
This manufacturing growth could significantly lower the carbon footprint and cost of energy storage systems in the U.S.
Economic & policy implications
Reshoring risks and rewards
While the reshoring trend is encouraging, SEIA and analysts warn that policy uncertainty could derail it:
- According to SEIA, instability in manufacturing incentives or changes in trade policy could threaten many of the newly announced factories.
- Some commentators note that political risk, especially around investment incentives, could undermine momentum in domestic capacity.
Supply chain transparency
To ensure ethical and sustainable sourcing, SEIA has introduced a traceability standard (SEIA 101).
- This standard requires companies to trace products from raw materials to finished parts.
- It also supports compliance with import regulations, such as U.S. Customs traceability requirements.
The bigger picture: Clean energy resilience
This domestic build-out isn’t just about raw production, it’s about long-term energy resilience. According to SEIA’s January 2025 report:
- Solar + storage are becoming central to a cleaner, more resilient grid.
- SEIA’s vision includes around 10 million distributed storage installations, or roughly 140 GWh of capacity, by 2030.
By growing both solar and energy storage manufacturing locally, the U.S. can reduce supply chain risk, improve innovation, and support clean energy deployment at scale.
Key take-aways for industry stakeholders
- Investors: The growth in U.S. manufacturing presents opportunities but comes with policy risk.
- Installers & developers: A growing domestic supply chain makes it easier to source components locally.
- Policymakers: Stability in incentives is crucial to maintain momentum and avoid undermining the reshoring trend.
- Consumers: More U.S.-made solar and storage means potentially lower costs, faster delivery times, and stronger energy security.
Final thoughts
According to SEIA’s latest Solar & Storage Supply Chain Dashboard, the U.S. is rapidly building up its ability to manufacture nearly every component of a solar + storage system, from wafers and cells to batteries and inverters.
But that progress depends on continued policy support, clear regulatory signals, and supply chain transparency. With those in place, America has a real shot at a resilient, made-in-USA clean energy future.
Sources
- SEIA, Solar & Storage Supply Chain Dashboard (SEIA)
- SEIA, Solar and Energy Storage Traceability Standard (SEIA 101) (SEIA Standards)
- SEIA, National Standard to Enhance Solar Supply Chain Transparency (SEIA)
- SEIA, American Solar & Storage Manufacturing Renaissance whitepaper (SEIA)
- SEIA, Vision for American Energy Storage (January 2025) (SEIA)
- SEIA Webinar / Data, Leveling Up Solar Manufacturing (SEIA)
- Solar Power World, Entire solar supply chain reshored in the U.S. (Solar Power World)
- CleanTechnica, Domestic Solar Manufacturing Booms (cleantechnica.com)