How long is the validity period for photovoltaic energy storage component quotations? They are typically divided into three tiers: 7-14 days, 14-30 days, and 30-60 days.
In 2026, due to the surge in lithium prices, energy storage quotations have generally been compressed to 7-14 days and have shifted to a “dynamic linkage” model.
I.
Industry Practices: Common Validity Period Tiers
- 7-14 days: Categories with large fluctuations in raw material prices (higher steel/copper/lithium prices), high-mix, low-volume orders, and building hardware and connectors whose prices are priced according to metal (Source: sr-mfg).
14-30 days: Standard sheet metal parts, moderate complexity, relatively stable market; this is a common range for energy storage structural components and general parts (Source: sr-mfg).
30-60 days: Large equipment, complete energy storage projects, large-scale purchases with long internal approval cycles; manufacturers are willing to lock in longer terms (Source: sr-mfg).
Over 60 days: Only appears in long-term agreements or blank purchase orders with price adjustment clauses, tied to quarterly/annual price adjustment mechanisms.
Overseas terms reference: 30 days by default when the quotation validity period is not specified (Eco-ESS UK); 15 days for Indian solar projects (Bharat Urja); 7 days for steel and aluminum fasteners due to futures fluctuations (Sinobolt).
II. Factors Determining the Validity Period
- Raw material price fluctuations are the primary variable: Metals are priced according to indices such as LME/COMEX, and can fluctuate by 5-15% within a few weeks, making it impossible for manufacturers to lock in costs in the long term (Source: sr-mfg).
- Capacity and production scheduling: Sheet metal/assembly plants schedule production based on limited working hours.
Long-term uncertainty in pricing can render capacity unavailable, so manufacturers use validity periods to manage production scheduling. - Secondary processing and outsourcing: Prices for outsourced processes such as powder coating, anodizing, and electroplating are affected by chemical and energy prices, which also shortens the validity period.
- Order volume and complexity: Large orders, orders with dedicated molds/tooling, and orders requiring specific production scheduling can negotiate longer validity periods and amortize mold costs.
- Supplier type: Traders/small and medium-sized factories are tighter;
leading manufacturers can offer more stable quarterly pricing frameworks;
leading energy storage companies mostly use annual frameworks.
III. The Surge in Lithium Prices in 2026 Spurs a New “Dynamic Linkage” Model
Lithium carbonate prices surged from a low of approximately 60,000 yuan/ton in 2025 to 190,000 yuan/ton (a threefold increase). Battery cells account for about 60% of the cost of energy storage systems, and lithium carbonate accounts for about 40% of the cost of LFP batteries, resulting in significant cost transmission (Source: 36Kr/TMTpost).
To control risks, the validity period of energy storage quotations has generally been reduced from 30 days to 7-14 days, with a clear stipulation that “overdue quotations automatically expire and need to be recalculated” (Source: 36Kr/Economic Observer).
State-owned enterprise integrators have changed their pricing system to “dynamic linkage”: the base price is calculated based on the current lithium price and linked to the Guangzhou Futures Exchange LC2609 futures contract. For every 10,000 yuan/ton increase in lithium price, the price increases by 0.03 yuan/Wh; for every 10,000 yuan/ton decrease, the price decreases by 0.02 yuan/Wh. The floor price is 170,000 yuan/ton, and the ceiling price is 220,000 yuan/ton.
The lithium ore spot market is even more extreme: traders are pricing at a premium of 5,000-8,000 yuan/ton to the futures market price, offering only a 3-7 day validity period, no price lock-in, no credit, and payment upon delivery (Source: Economic Observer).
Companies such as Far East Battery have explained to customers that their “quotes are valid for one to two weeks + price linkage mechanism,” and frankly stated that the validity period is usually 1-2 months (Source: Titanium Media).
IV.
Long-Term Contracts and Price Linkage Mechanism
- Fixed-price contracts proved ineffective against a 160% increase in lithium prices, making price linkage a mandatory option;
the authoritative third-party price (SMM battery-grade lithium carbonate) was used as the benchmark for linkage. - New long-term contract pricing: 70% linked to the Guangzhou Futures Exchange LC2609 futures price, 30% linked to the SMM spot average price, with tiered price adjustments—more linkage during price increases (approximately 80%), less linkage during price decreases (approximately 70%), plus a floor price of 170,000 yuan/ton.
- China Huadian Corporation’s 2026 energy storage system centralized procurement announcement explicitly adopted a linkage mechanism linked to SMM lithium carbonate prices, verifying the industrial-scale implementation of this model (Source: Titanium Media).
- Integrators and upstream suppliers signed annual framework agreements stipulating that “for lithium price fluctuations exceeding ±8%, both parties share 50% of the risk,” jointly mitigating the volatility.
- Companies should clearly specify terms before placing an order: Any clauses stating “automatic expiration upon expiration, requiring recalculation” must be written into the contract.
Once a quote is accepted, lock in the quantity as soon as possible to prevent default during price increase periods.
Policy Impact: From April 1, 2026, the export VAT rebate rate for batteries will be reduced from 9% to 6% (to be cancelled from 2027). Overseas energy storage companies will lose another 3 percentage points of profit within a year, further compressing the pricing window.
V. Handling and Response to Expired Quotations
Expired quotations do not equal order cancellation; it simply means the original price and delivery date are no longer guaranteed. Price adjustments will be made if material costs rise, and delivery times will be extended if production capacity is full. The prudent approach is to re-inquire as soon as possible (Source: sr-mfg).
Quotations must clearly state the validity period, currency, trade terms, and exchange rate range, avoiding vague statements such as “valid until a certain date.”
For large projects, include clauses such as “price valid until a certain date, recalculation after expiration” and “price linkage formula” in the contract to protect both parties.
For buyers, once a quote is confirmed, orders should be placed and quantities locked in as soon as possible to avoid supplier defaults or rejection at the original price during periods of rising lithium/metal prices (refer to the precedent of a household energy storage project quoted at 182,000 yuan, which was rejected after rising to 189,000 yuan in 5 days).
Delayed negotiations can negotiate terms such as: material price adjustment clauses, minimum order quantity commitments, and locking in molds/tooling in advance, all of which can allow manufacturers to extend the quotation window.
VI. Price Increase Transmission and Market Pressure in 2026
Sungrow Power will raise prices for its photovoltaic and energy storage products by 5%-15% starting September 20th: string/module/matrix inverters 5-10%, medium-voltage grid-connected 10-15%, and integrated energy storage converters 10-15%, mainly due to rising prices of copper, aluminum, tin, silver, and gold (Shanghai copper hit a record high of 112,300 yuan/ton) coupled with tightening supply (Source: National Business Daily).
Structural shortages of power devices: IGBTs and SiC MOS are being diverted to AI computing power, leading to widespread price increases in the first half of the year for companies like Jiejie Microelectronics, Infineon, ON Semiconductor, and Xinlian Integrated Circuits, a trend expected to continue into 2027.
For every 10,000 RMB/ton increase in lithium carbonate, battery costs rise by 0.006-0.008 RMB/Wh;
when lithium prices rise from 90,000 to 190,000 RMB, the overall cost of an 800MWh project will increase by 32-40 million RMB (Source: 36Kr/Everbright Securities).
The combined effect of reduced export tax rebates and rising metal prices has caused the average gross profit margin of energy storage to drop from 28% in 2022 to 16.3% in the first half of 2025, accelerating the exit of small and medium-sized integrators.
For buyers, the shortened validity period of quotations is inevitable due to the industry’s high volatility.
A proactive management approach combining “short windows + dynamic linkage + long-term contracts” is needed, rather than complaining that manufacturers’ quotations “don’t last a week.”
VII. Procurement Recommendations
Check Validity Before Comparing Prices: Quotations without an expiration date are assumed to be valid for 30 days. Upon receiving a quotation, confirm the validity period, currency, trade terms, and exchange rate to avoid recalculation due to expiration.
Determine Procurement Pace by Category: For metal connectors/structural components whose prices fluctuate, opt for short-window, quick orders. For large, complete projects, negotiate 30-60 day periods or use a price linkage formula.
Proactively Negotiate Price Linkage: Use SMM/Guangzhou Futures Exchange LC2609 as a benchmark, agree on price fluctuation thresholds (±5% or ±8%) and price adjustment formulas to lock in upper/lower risk limits.
Use Long-Term Contracts and Frameworks: Sign annual framework agreements with major manufacturers with guaranteed minimum prices, turning “weekly inquiries” into “quarterly price adjustments,” ensuring stable supply while maintaining flexibility.
Trends and Summary
- The validity period of photovoltaic energy storage component quotes is generally trending shorter: Under the triple pressure of lithium prices, metals, and power devices, 7-14 days has become the new normal for energy storage quotes (Source: 36Kr/Economic Observer).
- Pricing is shifting from “fixed price” to “dynamic linkage”: Fixed-price contracts expire before a 160% price increase, and price linkage and tiered pricing have become industry standard.
- Upgraded long-term agreements and framework agreements: Guaranteed/capped prices + futures linkage + risk sharing allow both buyers and sellers to stabilize cash flow during periods of high volatility.
In 2026, price increases for copper, aluminum, tin, silver, gold, and power devices will continue, with photovoltaic and energy storage products generally rising by 5-15%.
The pricing window will only evolve between “shorter” and “more interconnected” pricing mechanisms.
For buyers, the validity period of a price quote depends on product category fluctuations and negotiating leverage.
The key is to use short windows for quick orders, use interconnected mechanisms to mitigate risks, and use long-term contracts to stabilize supply, turning price fluctuations into negotiating opportunities.
