Where are fortress batteries made?
Fortress Power batteries are primarily manufactured in China through their subsidiary Hangzhou Baoneng New Energy Technology Co., Ltd., located in Shangcheng District, Hangzhou. Established in 2021, this facility specializes in lithium iron phosphate (LiFePO4) battery systems for residential and commercial energy storage, serving markets in North and South America. The company integrates R&D, design, and production at this site, adhering to international certifications like UL 9540A for safety and performance.
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What is Fortress Power’s manufacturing footprint?
Fortress Power operates its core production through Hangzhou Baoneng New Energy, a China-based subsidiary established in 2021. The facility focuses on LiFePO4 battery packs for home energy storage (e.g., 5kWh eFlex, 18.5kWh eVault) and small-scale commercial systems. Pro Tip: Their UL 9540A certification ensures compliance with North American fire safety standards, critical for market acceptance.
The Hangzhou plant combines R&D and manufacturing, with a workforce of 20–99 employees specializing in BMS software and embedded systems. While the brand is headquartered in North America, all critical production stages—cell assembly, thermal management integration, and final testing—occur in China. For example, their 48V residential systems use prismatic LiFePO4 cells sourced from Tier-1 suppliers, assembled into IP65-rated enclosures locally. Warning: Avoid mixing Fortress batteries with non-certified inverters; compatibility issues may void warranties.
| Feature | Hangzhou Facility | Typical Competitors |
|---|---|---|
| Certifications | UL 9540A, ISO 9001 | UL 1973 only |
| Production Focus | Residential + Small Commercial | Industrial-scale |
How does Fortress ensure quality in overseas manufacturing?
Fortress Power implements dual-layer quality control, with Hangzhou engineers conducting in-process inspections and North American teams auditing finished products. Their BMS software undergoes 200+ validation cycles simulating extreme temperatures (-20°C to 60°C) and load fluctuations.
Beyond factory checks, Fortress mandates supplier audits for cell vendors and uses blockchain-based tracking for raw materials like lithium and cobalt. Practically speaking, this means every eVault battery shipped to Texas or California has a digital passport detailing its component origins. A real-world example: Their eFlex 5kWh system’s cycle life (6,000+ cycles at 80% DoD) is verified through 18-month accelerated aging tests in Hangzhou’s climate chambers. Pro Tip: Always request third-party test reports when purchasing—reputable distributors provide these upon request.
| Quality Metric | Fortress Standard | Industry Average |
|---|---|---|
| Cycle Life (80% DoD) | 6,000 cycles | 4,500 cycles |
| Cell Matching Tolerance | ≤2% | ≤5% |
Battery Expert Insight
FAQs
Yes, but only with inverters listed in their compatibility matrix (e.g., Sol-Ark, OutBack). Mismatched systems may trigger BMS fault codes due to communication protocol differences.
Does Fortress Power offer warranties for international purchases?
Warranties (10 years) apply only to units bought through authorized distributors in target markets. Gray-market imports lack coverage—always verify distributor authorization status.