In recent years, many households in Vietnam have invested in rooftop solar systems to reduce electricity costs and gain more control over their daily energy use. Along with this trend, the demand for battery energy storage has also surged. However, a concerning reality is that many homeowners opt for DIY batteries made from low-quality LFP cells instead of investing in certified Battery Energy Storage Systems (BESS). This practice poses serious risks.
Fire and Explosion Hazards of DIY Batteries
DIY batteries often lack a proper Battery Management System (BMS), are not certified for fire safety, and do not pass international safety standards such as IEC 62619 or UL 1973. Even a small error in cell welding, wiring, or voltage imbalance can lead to short circuits, abnormal discharges, and fires.
Imagine a DIY battery pack of several dozen kWh placed in your garage or living room – if it catches fire, your entire house could be destroyed within minutes.
Short Lifespan – “Costly and Risky”
Manually assembled batteries usually contain inconsistent or low-quality cells, causing capacity to degrade rapidly after only a few hundred cycles. While users may think DIY batteries are cheaper, in reality, they often need replacement within 1–2 years. The total cost can end up far higher than investing in a certified BESS with a 5–10 year warranty.
No Insurance, No Certification
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No insurance coverage in the event of fire or explosion.
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Stricter fire safety and electrical regulations in many regions.
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Systems without certifications and technical documents are unlikely to be approved by authorities.
How to Identify a Certified BESS
Households should choose residential BESS systems that provide:
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International safety certifications (IEC, UL, TÜV)
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Anti-counterfeit labels and QR codes for traceability
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Long-term warranties and local technical support in Vietnam
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A reputable brand with proven installations in homes, resorts, or public facilities
Advice for Rooftop Solar Users
Family safety must always come first. Do not risk your health, property, and life just to save a few thousand dollars.
Investing in a certified solar battery storage system not only maximizes solar energy utilization but also provides long-term peace of mind and protects your home from unforeseen dangers.
👉 Choose a certified BESS solution for safety – efficiency – sustainability.
