Higher Efficiency. Better Project Economics.
25% tandem panels, advancing to 27%+ by 2027, change the ROI math for every rooftop and ground-mount project you spec: more power per square meter and fewer components to install.
Get notified as panels clear certification and hit availability at scale. No sales calls.
Same Roof, More kW
Silicon (~22%)
16 panels needed
Tandem (25%)
14 panels, same output
The Reality on Every Project
The constraints you're already fighting
Fixed roof and interconnection limits
Commercial and industrial roofs have a hard ceiling on usable area, and utility-scale sites face capped interconnection capacity. Every project is a fight for more output from the same constrained footprint.
Rising Balance of System costs
Racking, wiring, and inverter costs have not fallen as fast as module prices. BOS now makes up a growing share of installed project cost, and it scales with panel count, not capacity.
Vendor stability uncertainty
Tandem is new to commercial production, and not every supplier will still be shipping in three years. Specifying the wrong vendor risks warranty claims nobody can honor.
What Efficiency Buys You
Function meets business outcome
More Power Per Square Meter
Convert fixed roof or site area into maximum kW capacity. A jump from ~22% to 25% commercial efficiency (27%+ by 2027) means meaningfully more watts from the same array footprint.
Lower BOS Costs
Higher wattage per module means fewer rails, less racking, and smaller inverter counts to hit the same target capacity: a direct cut to the non-module costs that decide project margin.
Stronger EPC Margins
Higher yield per panel improves project LCOE, which typically translates into stronger EPC margins and a more competitive bid, without changing your install process or crew size.
Calculate Your Tandem Advantage
Model your project economics using commercial tandem performance data.
Baseline Silicon Efficiency
22%
Fixed reference point for standard single-junction silicon.
Capacity Increase
+0
Extra output from the same 10,000 sqm footprint. Manufacturers target over 20% extra power density as cell efficiencies advance toward 27%+.
LCOE Impact
10%
Projected reduction
Project ROI Lift
12%
Projected increase
Illustrative estimate based on commercial tandem module claims at 25% efficiency. Confirm site-specific figures with a supplier.
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How It Works
From tracking to spec, in three steps
Track Commercial Availability
Monitor certification progress and supplier scaling timelines so you know exactly when tandem panels become spec-ready for your market.
Evaluate BOS Cost Reductions
Calculate the component savings, fewer panels, less racking, smaller inverter counts, against your specific project footprint and target capacity.
Source Verified Suppliers
Connect with vetted manufacturers and technology licensors through the B2B directory, filtered by category and technology.
Before You Spec
Frequently asked questions
How does long-term stability compare to silicon?
Early perovskite cells degraded faster than silicon under heat, humidity, and UV exposure. Encapsulation techniques and compositional engineering have closed most of that gap in recent commercial designs, but ask any supplier for their accelerated aging test data (IEC 61215/61730) and field pilot results before specifying at scale.
What should I expect from warranty terms?
Because tandem is newer to commercial production, warranty terms vary more between suppliers than they do for mature silicon panels. Compare power-output warranties (typically year-25 guaranteed output) and workmanship warranties directly, don't assume parity with silicon-panel norms.
How is lead content handled in perovskite layers?
Most high-performing perovskites use small amounts of lead, encapsulated within the module stack. Ask suppliers about their encapsulation standard, end-of-life recycling program, and compliance with regional environmental regulations before you commit to a spec.