Both are 3.2V 314Ah prismatic LiFePO4 cells in the same 72mm footprint (207.2 × 71.7 × 173.7mm), so they share the same busbars, compression fixtures, and rack enclosures:

• Cycle life: both rated 8,000 cycles
• Internal resistance: Cornex ≤0.17mΩ vs EVE MB31 ≤0.18mΩ — the Cornex is marginally lower
• Charge rate: the Cornex specifies 1C standard charge/discharge (full-rate), while EVE MB31 standard is 0.5C
• Certification: Cornex ships with MSDS, UN38.3, CE; EVE MB31 adds UL
• Brand background: Cornex (CORNEX New Energy) is a leading Chinese energy-storage battery manufacturer covering the full industrial chain for ESS and EV markets — a strong value alternative when EVE stock is tight

Important: do not mix Cornex and EVE cells in the same 16S pack — different brands have different charge curves and characteristics; mixing causes imbalance and shortens pack life. Build each pack from one brand and one matched batch.

The Cornex 314Ah is rated for 8,000 charge/discharge cycles at 25°C — over 21 years of daily cycling, with only 2–4% capacity fade per year under normal use — backed by a 5-year warranty. Low self-discharge in storage means the cells hold their charge well between delivery and installation.

What protects that life in real service:

• Stable, inherently safe LiFePO4 chemistry — no thermal runaway risk
• 10%–90% recommended SOC window — avoids stressing the cell at the extremes
• For 16S packs, set the inverter/charger to 55.2V max charge voltage, up to 150A charge / 200A discharge, in lithium (CAN/RS485) or lead-acid mode
• Fully charge the battery to 100% at least once a month to keep BMS SOC readings accurate, especially in winter with low solar input
• UL-classified thermal stability is inherent to the chemistry, not just the spec sheet

HSEV- is the third tier in Gobel Power's four-level grading (ESS → LSEV → HSEV- → HSEV). For this Cornex 314Ah listing it means every cell ships with:

• Matched internal resistance — AC impedance ≤0.17mΩ, sorted for uniformity across your order
• Matched voltage and matched capacity — so your pack stays balanced from the very first cycle, with no weak links
• Visual inspection — no swollen casing, no dented corners, no terminal corrosion
• Manufacturer's data sheet verified by Gobel Power technicians — we guarantee the product is authentic and brand new

HSEV- sits below the top HSEV tier (which adds the official per-cell test report), but is well above ESS and LSEV grades that only match voltage/IR or skip capacity matching entirely. Your order includes flexible busbars and epoxy sheet as standard.

Build ideas:

• 16S DIY battery pack — ~16.1kWh at 51.2V for home solar energy storage
• 12V / 24V / 48V off-grid builds — discharges down to -30°C for cold climates
• Server rack batteries, marine & RV house power, commercial ESS — standard prismatic format drops into existing enclosures

The 1C/1C continuous rating (314A) gives headroom for high-power inverters and fast full-rate charging.

Shipping: all battery cells ship by sea freight (1–2 months, door-to-door, tax-free — we've paid the tax); air freight (under 15 days) is available on request. Small spare parts can ship by UPS/DHL. Cells are packed in anti-static, shock-proof packaging, and any cell damaged in transit will be replaced free of charge.

Payment: PayPal, credit card, bank/wire transfer (TT), or Alibaba Trade Assurance. Every order ships with matched HSEV- cells plus flexible busbars and epoxy sheet.