Frequently Asked Questions

MOQ is 1 piece for most products. For OEM/ODM customized orders, the MOQ is negotiable — contact us with your requirements.

Standard products in stock ship within 3-7 working days. Volume orders and customized battery packs usually take 15-25 working days depending on quantity and specification.

Yes. We ship globally from Shenzhen Port. Options include DHL/FedEx/UPS express for samples and small orders, sea freight (FCL/LCL), rail freight to Europe, and DDP door-to-door service for EU/US.

Yes. We support logo printing, custom capacity/voltage, custom BMS parameters, custom enclosures and packaging. Services include drawing-based customization, sample-based customization, full customization and minor customization.

Most battery products carry a 5-year warranty (some models 3 years). The warranty covers manufacturing defects; cycle life of Grade A cells is rated at 4000+ cycles at 80% DOD.

Our products are certified with IEC 62619, UN38.3, RoHS, EMC, CE Declaration of Conformity and EU Battery Regulation (EU) 2023/1542. Certificate copies are available on request.

We use Grade A EV-class prismatic LiFePO4 cells from top-tier manufacturers such as CATL, REPT, EVE and CALB. Key models include 280Ah, 302Ah, 314Ah and MB56 series.

Submit the inquiry form on any product page (the product and SKU are attached automatically), message us on WhatsApp, or email us. Our sales team replies within 12 hours on working days.

The most stable lithium iron phosphate battery has been adopted. Its thermal stability far exceed that of other types of batteries. From the very beginning, it significantly reduces the risk of thermal runaway. The built-in intelligent BMS (Battery Management System) of the battery provides multiple hardware-level protections against overcharging, overdischarging, overcurrent, short circuit and high temperature. It has also passed strict certifications such as CE/ROHS/MSDS/UN38.3 to ensure safe.

BMS provides overcharge protection to prevent damage to the battery cells, overdischarge protection to avoid deep discharge and battery damage, overcurrent and temperature protection to prevent circuit overheating (for example, 0°C - 45°C during charging), and automatically intervenes when the temperature is too high. Battery balancing: ensures that the voltages of all battery cells remain consistent, thereby extending the overall lifespan of the battery.

We have a clear after-sales process: 1:Contact our customer service by email or phone and describe the problem phenomenon. 2:Our technical support team will conduct a remote diagnosis and guide you on simple troubleshooting.3. If it is determined to be a quality issue, overseas warehouse return and exchange services will be provided.For non-human-caused problems within the warranty period (accidents and the like are usually not covered by the warranty), we will bear the repair costs.

We offer clear warranty policies and a localized technical support network. In case of any issues, quick responses can be provided via hotline or online support. When necessary, professional technical engineers will be arranged for 1-on-1 special handling.

some of times in stock, we can make 3-7days fast delivery. For USA,Canada,Austraila and most of European country , we provide tax included services, door to door, once you place an order ,then you will receive your new battery pack in about 40-55 days at your home! We also have Oversea warehouse service, 3-7days arrive, no tax fees, please contact with our sales !

The battery can withstand a continuous maximum discharge current of up to 314A, thanks to its extremely low internal resistance design (less than 0.25 milliohms). The amount of heat generated during ultra-high power output is minimal, and its stability and safety far exceed those of ordinary batteries. A 48V system with 16 series-connected cells, a discharge current of 314A, means it can support a maximum instantaneous power output of over 16 kilowatts. You can easily drive high-power inverters.

The new generation products (such as 314Ah) can help achieve lower cost per unit of electricity (LCOS). The specific savings ratio needs to be calculated based on the project.

Significant cost savings, extremely high customization flexibility, self-customization of capacity and shape size, performance customization, in-depth understanding and learning, process experience and sense of achievement, controllability and repairability of components.

Ultra-long lifespan and economic efficiency; Outstanding safety performance; Strong environmental adaptability; Environmental friendliness and convenience. Unmatched Cycle Life: Enjoy over 4000~12000 cycles at 80% Depth of Discharge (DOD), significantly outperforming lead-acid batteries. This translates to more than 5-10 years of reliable service, reducing long-term replacement costs and providing exceptional value.

Supports various trade terms like EXW, FOB, CIF, DDU, and DDP.Most of the products are available in stock at overseas warehouses, we can make 3-7days ddp fast delivery. For USA,Canada,Austraila and most of European country , we provide tax included services, door to door, once you place an order ,then you will receive your new battery pack in about 40-55 days at your home! We also have Oversea warehouse service, 3-7days arrive, no tax fees, please contact with our sales !

We(QSO)offer a one-stop solution. After the purchase, our technical team or certified installation partners will provide remote support to ensure a smooth installation and commissioning. The product is designed as modular and ready-to-use, significantly reducing the complexity of installation.

It supports 16 parallel connections, offers free scheme design and capacity planning suggestions to help customers assess their own needs (average daily electricity consumption, maximum load power, electricity price policies), and builds your home photovoltaic renewable energy system. Modular design supports parallel expansion + compatibility with mainstream photovoltaic systems + intelligent EMS automatically optimizes power usage strategies,(Self-consumption / Peak-valley arbitrage).

Yes, the compatibility is very good. This battery supports CAN/RS485 communication protocols, and has preset communication protocols with mainstream inverters in the market (including but not limited to Victron, SMA, Deye, Growatt, Goodwe). Before purchasing, please inform us of the brand and model of your inverter, and we can assist you in confirming the compatibility and completing the matching settings before shipment.

QSO uses high-precision OCV (Open Circuit Voltage) testers with an accuracy of 0.1mV. We only match cells that have been stabilized in our climate-controlled aging room for at least 72 hours. This eliminates 'false' voltage readings caused by surface charge. For wholesalers, this means the cells you receive can be assembled into packs immediately with minimal top-balancing required, saving hours of labor cost and ensuring a perfectly balanced system from the first charge cycle.