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.
| Spec | Detail |
|---|---|
| Model / Name | Starmax SHTL12-26 (listed / equivalent models: Starmax STG12-26, CSPower HTL12-26) |
| Type | Deep-cycle GEL / VRLA (sealed, maintenance-free) |
| Nominal Voltage | 12 V |
| Nominal Capacity (20-hr) | 26.0 Ah (@ 20 hr rate) |
| Capacity (10-hr) | 23.0–24.2 Ah (vendor & test rate differences: CSPower lists 23 Ah @10-hr; Starmax lists 24.2 Ah @10-hr) |
| Capacity (5-hr / 1-hr) | CSPower: 5-hr = 20.5 Ah; 1-hr = 15.9 Ah |
| Internal resistance (fully charged @25°C) | ≤ 11.5 mΩ (CSPower) |
| Max short discharge current | 1260 A (5 s) (CSPower) |
| Designed floating life | 15 years @ 25°C (CSPower HTL series) |
| Cycle life / DOD | ~1,750 cycles @ 50% DOD (CSPower HTL spec) |
| Recommended charge (constant voltage) |
Standby/Float: 13.6–13.8 V (initial charge current <6 A). Cycle use: 14.4–14.9 V (initial charge current <6 A). (CSPower technical data) |
| Self-discharge | ~3% per month @25°C (CSPower) |
| Operating temperature | Discharge/Charge/Storage: approx. -25°C to +60°C (CSPower); some vendors claim -40°C to +60°C for high-temp types |
| Dimensions (manufacturer variations) |
CSPower HTL12-26: 166 × 126 × 174 mm (L × W × H). ≈ 6.535 × 4.961 × 6.850 in. :contentReference[oaicite:0]{index=0} Starmax STG12-26 (site listing): 6.57 × 6.89 × 4.92 in (different orientation/measurement order). :contentReference[oaicite:1]{index=1} Made-in-China sample listing: 175 × 166 × 125 mm ≈ 6.890 × 6.535 × 4.921 in (different pack variant). :contentReference[oaicite:2]{index=2} |
| Weight |
CSPower: 8.5 kg (±3%) ≈ 18.74 lb. :contentReference[oaicite:3]{index=3} Starmax listing: 19.6 lb ≈ 8.89 kg. :contentReference[oaicite:4]{index=4} Note: small discrepancies exist between vendor listings — both values are close (≈18.7–19.6 lb). |
| Case material | ABS case (UL94:HB; UL94:V0 version available) (Starmax data sheet / listing). :contentReference[oaicite:5]{index=5} |
| Terminal | Typical bolt/terminal types: T2 / M6x14 (CSPower HTL table shows T2 M6×14 for HTL12-26). :contentReference[oaicite:6]{index=6} |
| Certifications | CE / UL / ISO / IEC (varies by supplier/listing). :contentReference[oaicite:7]{index=7} |
| Typical applications | Solar (off-grid), UPS, mobility, golf, wind, sweepers, forklifts, telecommunications, emergency lighting. :contentReference[oaicite:8]{index=8} |
| Warranty (typical listing) | CSPower example: 3 years (35–40°C average); Made-in-China samples show 2 years on some listings — confirm with supplier. :contentReference[oaicite:9]{index=9} |
| Notes / Vendor differences |
– Starmax lists the STG12-26 (their product page) with 6.57 × 6.89 × 4.92 in and 19.6 lb. :contentReference[oaicite:10]{index=10} – CSPower HTL12-26 technical sheet gives the detailed electrical parameters (internal resistance, charging voltages, cycle life). :contentReference[oaicite:11]{index=11} – Made-in-China supplier pages show multiple variant specs (dimensions/packaging) — dimensions/weight can vary by manufacturer/terminal style. Always confirm exact part number and datasheet with your supplier before purchasing. :contentReference[oaicite:12]{index=12} |
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