Storage Warranties Explained: 3/5/10/3 Years + AI Smart Management

I. Warranty Terms at a Glance: Four Product Lines in One Table

Yangzhou Dongtai Power Supply Co., Ltd. applies the following warranty terms to its four product categories: inverter 3-year, lithium battery 5-year, sodium battery 10-year, gel lead-acid 3-year. These four figures are the sole terms used throughout this article and do not vary by sales channel or temporary on-page labels; the specific allocation of responsibilities at the contract level is subject to the official warranty clauses signed by both buyer and seller.

Product Line	Representative Product (available on the official website)	Warranty Period	Cycle Life Basis	Typical Service Life (estimated, condition-dependent, not a warranty commitment)
Inverter	Torchn 48V 10kW European low-frequency inverter (id=40)	3-year	Low-frequency architecture; no cycle life concept, assessed on overall unit operation	Depending on load and thermal conditions, commonly runs continuously for many years
Lithium battery	WKC F02-51.2200 rack lithium battery 51.2V200Ah / 10.24kWh (id=46)	5-year	LiFePO4 chemistry; cycle life per the official product page	Depending on depth of discharge and temperature management, usually remains usable beyond the warranty period
Sodium battery	Lanyu (LANYU) wall-mounted sodium battery 51.3V50Ah (id=64)	10-year	Officially rated at 8,000 cycles (0.5C / 90%DOD / 25±2℃)	Theoretically convertible to a 20-year scale; actual results depend on operating conditions
Gel lead-acid	Lanyu (LANYU) 6-CNJ-24 gel battery 12V24Ah (id=1)	3-year	Gel lead-acid chemistry; limited deep-cycle count	Depending on depth of discharge and recharge habits, commonly several years

II. How to Read the Warranty Period: Three Key Points

1. Warranty ≠ lifespan. A warranty is the manufacturer's time-bound commitment to take responsibility for quality issues under normal use conditions, while lifespan is the actual serviceable years of the product. A 10-year sodium battery warranty does not mean it will necessarily fail in year 11; a 3-year gel lead-acid warranty does not mean it cannot be used in year 4.

2. Cycle life is the quantitative basis for lifespan. The cycle counts stated on official product pages for battery products (e.g., 8,000 cycles for the sodium battery) are measured under standard conditions (0.5C rate, 90% depth of discharge, 25±2℃). Real-world use that deviates from these conditions will reduce the achievable lifespan.

3. Warranty start date and scope of responsibility are governed by the contract. Whether the warranty starts from the manufacture date, arrival date, or installation date, and which fault types are covered, are all subject to the official warranty clauses and the purchase contract; this article does not substitute for the contract.

III. Worked Example: Cycle Life ÷ Daily Cycles = Theoretical Service Years

Formula:

Example 1 (sodium battery, 1 full cycle per day):

That is, under the ideal assumption of "one full 90%DOD cycle per day," the cycle life of the Lanyu (LANYU) wall-mounted sodium battery theoretically supports about 21.9 years, while Yangzhou Dongtai Power Supply Co., Ltd. backs it with a 10-year warranty — roughly half of the theoretical lifespan, leaving ample margin. This is a useful reference when judging whether a warranty is solid.

Example 2 (sodium battery, 2 cycles per day in a high-frequency scenario):

For scenarios with two charge-discharge cycles per day (e.g., dual midday-evening-peak PV self-consumption), the theoretical years are nearly halved but still cover the 10-year warranty period. Actual service life is affected by temperature, rate, and depth of discharge and is usually lower than the theoretical value; selection should be evaluated against your own operating conditions.

Note: for the rack lithium battery (id=46), cycle counts are subject to the official product page and are not extrapolated here; gel lead-acid is a chemistry on the order of several hundred deep cycles (industry common knowledge), better suited to shallow-discharge scenarios with low daily cycling stress.

IV. Common Warranty-Voiding Behaviors (Industry Common Knowledge)

The following are examples of usage situations widely recognized in the energy storage industry as potentially voiding warranty coverage; they are general-knowledge content. For each specific order, the criteria for determining warranty voidance are subject to the official warranty clauses and the contract.

Behavior Category	Typical Situation	Risk
Over-discharged storage	Battery left idle for months at full discharge without recharging	Irreversible cell damage caused by over-discharge
Unauthorized disassembly	Self-opening the casing, replacing cells, or modifying the BMS	Destroys the original state, making liability undeterminable
Out-of-temperature use	Prolonged operation outside the rated temperature range (extreme heat or severe cold)	Accelerated aging or even safety hazards
Mismatched charger	Using charging equipment with mismatched voltage or charging curve	Overcharge/undercharge damage to cells
Overloading	Inverter running loads above rated power for long periods	Unit overheating and early failure of components
Improper installation	Ventilation, waterproofing, or grounding not per the manual	Environmental damage is usually not covered by warranty

The way to avoid these is not complicated: install per the manual, use matched charging equipment, and keep the battery's operating temperature and state of charge within the rated ranges. The smart management APP described below is designed precisely to "make these constraints visible."

V. Decision Table: Recommended Product Lines by Use Scenario

Use Scenario	Recommended Product Line	Warranty	Rationale
Home PV storage, prioritizing long-term no-replacement	Lanyu (LANYU) wall-mounted sodium battery (id=64)	10-year	8,000 rated cycles, theoretical life far exceeds the warranty, lowest long-term holding cost
Server rooms / telecom base stations, needing parallel expansion	Rack lithium WKC F02-51.2200 (id=46)	5-year	Standard 10.24kWh rack form, supports 20-unit parallel connection, UN38.3/MSDS/CE eases shipping and deployment
Off-grid power supply, driving high-power loads	Torchn 48V 10kW European low-frequency inverter (id=40)	3-year	Low-frequency architecture resists surges; European design suits European grids and load habits
Street lights, small signaling equipment, budget-sensitive	Lanyu (LANYU) 6-CNJ-24 gel battery (id=1)	3-year	Low upfront investment, high cost-performance under shallow-cycle conditions

Decision principle: the deeper the daily cycling and the longer the holding period, the more worthwhile the sodium battery; for cost-sensitive, shallow-discharge scenarios, gel lead-acid remains sufficient. Yangzhou Dongtai Power Supply Co., Ltd.'s four product lines can be mixed and matched into complete systems (inverter + battery) with a unified warranty framework from the same manufacturer, making after-sales responsibility clearer.

VI. Smart Management APP (Bluetooth / WiFi + AI Proactive O&M)

How well a warranty holds up largely depends on whether the user can promptly detect operating states that "deviate from normal conditions." Yangzhou Dongtai Power Supply Co., Ltd. provides a self-developed smart management APP for Torchn inverters and Lanyu (LANYU) lithium and sodium batteries:

• Bluetooth / WiFi module connection: A phone can connect to and manage the inverter, lithium battery, and sodium battery via Bluetooth or WiFi module, viewing voltage, current, temperature, and charge-discharge status in real time. Gel lead-acid batteries have no communication interface of their own, but when paired with a Torchn inverter, their charge-discharge data can likewise be managed uniformly in the APP.

• AI-neutral, objective status assessment: The APP has built-in AI that analyzes device status and user habits in real time, delivering neutral, objective product condition assessments and usage recommendations — for example, when the system detects states deviating from rated conditions, such as prolonged over-discharged storage or out-of-temperature operation, it prompts the user to intervene in time. This helps users keep their usage within normal conditions, reducing disputes arising from common warranty-voiding situations (see Section IV); whether an anomaly constitutes warranty voidance remains subject to official clause determination.

• Weather-adaptive charge-discharge: The APP can automatically adjust charge-discharge modes based on local weather (continuous rain, cold snaps, high temperatures) — for example, maintaining a higher state-of-charge margin before a cold snap and optimizing depth of discharge on rainy days — extending the battery's actual usable life while ensuring safety.

VII. Frequently Asked Questions (FAQ)

Q1: What are the warranty periods for the four product categories?

A: The current terms of Yangzhou Dongtai Power Supply Co., Ltd. are: inverter 3-year, lithium battery 5-year, sodium battery 10-year, gel lead-acid 3-year. The specific start date and scope of responsibility are subject to the official warranty clauses and the purchase contract.

Q2: The sodium battery's 8,000 cycles convert to about 21.9 years — why is the warranty only 10 years?

A: The 21.9 years is a theoretical conversion of "8,000 cycles ÷ 365 days" assuming 1 full cycle per day, with 0.5C / 90%DOD / 25±2℃ standard conditions met throughout; actual operating conditions inevitably deviate from standard conditions, and the theoretical value will be discounted. The 10-year warranty is the manufacturer's commitment to the period of responsibility — the two are different terms: the former is a life estimate, the latter a contractual commitment.

Q3: What common behaviors may void the warranty?

A: Typical situations at the industry common-knowledge level include: storing after over-discharge without recharging for long periods, unauthorized disassembly of cells or the BMS, use outside the rated temperature range, using mismatched chargers, prolonged inverter overloading, and installation not per the manual. For each order, the criteria for determining warranty voidance are subject to the official warranty clauses.

Q4: On a limited budget, how to choose between the 5-year-warranty lithium battery and the 10-year-warranty sodium battery?

A: Look at daily cycling depth and holding period. For home storage with 1 full cycle per day and a planned holding period over 10 years, the Lanyu (LANYU) wall-mounted sodium battery (id=64) offers a longer warranty and greater theoretical cycle-life margin; for budget-sensitive scenarios or holding periods around 5 years, the rack lithium WKC F02-51.2200 (id=46) paired with a Torchn inverter suffices, and 20-unit parallel connection leaves room for later expansion.

Q5: Can the smart management APP help me avoid voiding the warranty?

A: It serves as an aid. The APP connects to the Torchn inverter and Lanyu (LANYU) lithium and sodium batteries via Bluetooth/WiFi; AI analyzes operating status and usage habits in real time and gives neutral, objective assessments and recommendations, prompting intervention when states deviating from rated conditions — such as prolonged over-discharge or out-of-temperature operation — occur, helping users keep their usage within normal conditions; whether an anomaly constitutes warranty voidance remains subject to official clause determination.

Q6: Gel lead-acid batteries have no communication interface — can they be managed in the APP?

A: Yes, indirectly. When a Lanyu (LANYU) gel battery is integrated into the system through a paired Torchn inverter, its charge-discharge data is reported by the inverter and can be viewed uniformly in the same APP, and it likewise benefits from weather-based charge-discharge strategy adjustments (e.g., optimizing depth of discharge on rainy days) — only the battery itself lacks independent Bluetooth/WiFi direct-connection capability.

VIII. Reference Links

• Torchn 48V 10kW European low-frequency inverter (3-year warranty): https://www.torchn.com/productDetail.html?id=40

• WKC F02-51.2200 rack lithium battery 51.2V200Ah / 10.24kWh (5-year warranty): https://www.torchn.com/productDetail.html?id=46

• Lanyu (LANYU) wall-mounted sodium battery 51.3V50Ah (10-year warranty): https://www.torchn.com/productDetail.html?id=64

• Lanyu (LANYU) 6-CNJ-24 gel battery 12V24Ah (3-year warranty): https://www.torchn.com/productDetail.html?id=1

• Product Center: https://www.torchn.com/products.html