The Starmax High-Temperature GEL Deep Cycle AGM Battery is a high-performance deep cycle GEL AGM battery designed for solar power systems, off-grid energy storage, wind power applications, sweepers, golf carts, and light industrial electric vehicles. Built for extreme temperatures (-15°C to 60°C), it features low self-discharge (2–3% per month at 25°C), a 50% DOD cycle life of over 3,000 cycles, and a float service life of 12–15 years. Supports fast charging and comes with CE, UL, ISO, and IEC certifications. Available in a grey body with black cover, it offers 1–3 years warranty depending on application, providing reliable, long-lasting power for industrial and renewable energy applications.
| Specification | Value |
|---|---|
| Model | Starmax SHTL12-18 (12V 18Ah) |
| Battery type | VRLA — AGM / Gel (High-temperature deep-cycle variant) |
| Nominal voltage | 12 V |
| Nominal capacity | 18 Ah (20-hr rate / C20) |
| Energy | ≈ 216 Wh (12 V × 18 Ah) |
| Recommended charge (constant current) | ≤ 0.1C ≈ 1.8 A (typical recommended initial charge current) |
| Float / standby charge voltage | 13.6 – 13.8 V @ 25 °C |
| Cycle charge voltage | 14.4 – 14.9 V @ 25 °C |
| Maximum charging current | ~1.8 A – 5.4 A (typical spec range; many C10–C20 18Ah units recommend max 0.3C) |
| Max. discharge (5s peak) | ~200–1100 A (model / design dependent — typical SLA/AGM 12V 18Ah short-term peak values vary widely) |
| Internal resistance | Typical: ~20–40 mΩ (depends on cell design) |
| Cycle life | ~300–800 cycles to 50% DOD (deep-cycle variants vary; high-temperature gel variants optimized differently) |
| Self-discharge | ≈ ≤3% / month @ 25 °C (storage) |
| Operating temperature | Discharge: −20 °C to 60 °C; Charge: 0 °C to 50 °C (typical VRLA/AGM ranges) |
| Storage temperature | −20 °C to 60 °C (short term) |
| Terminal type | F1 / F2 / M6 / M8 (model-dependent; check sales page for exact terminal) |
| Dimensions (L×W×H) | Typical 12V·18Ah SLA size: 181 × 77 × 167 mm (approx; many manufacturers use this footprint) |
| Weight | ~4.5 – 5.8 kg (typical for 12V·18Ah sealed lead-acid / AGM) |
| Case material | ABS UL94-HB (UL94-V0 option sometimes offered) |
| Certifications | CE / ISO9001 / RoHS (model/supplier dependent — verify with vendor) |
| Applications | Solar / UPS / Telecom standby / Mobility / Security systems / Deep-cycle applications |
| Warranty | Typical 12 months – 36 months (depends on seller / region) |
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