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What Is The GPL-27T AGM Battery?
The GPL-27T AGM battery is a valve-regulated lead-acid (VRLA) battery utilizing Absorbent Glass Mat (AGM) technology. It features a sealed design with electrolyte absorbed in glass fiber separators, enabling spill-proof operation and high current discharge. Optimized for applications like automotive start-stop systems, backup power, and telecom infrastructure, it offers extended cycle life (500–1000 cycles), low self-discharge, and tolerance to deep discharges. Charging requires ≤14.5V to prevent overvoltage damage.
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How does AGM technology work in the GPL-27T?
The GPL-27T uses AGM separators to immobilize sulfuric acid within glass fibers, creating a recombinant oxygen cycle. This design eliminates free liquid, reduces gassing, and allows vertical/horizontal installation. During charging, oxygen migrates from positive to negative plates, recombining with hydrogen to form water—minimizing water loss. Pro Tip: Avoid exposing AGM batteries to temperatures above 45°C to preserve separator integrity.
What are the key specs of the GPL-27T?
Typical specs include a 12V nominal voltage, 27Ah capacity (C20 rate), and 500–800 cranking amps (CA). Dimensions approximate 190mm x 130mm x 220mm, weighing ~20kg. Terminal types vary (e.g., SAE, DIN). For example, a GPL-27T can power a mid-sized UPS for 2–4 hours. Pro Tip: Always check cold-cranking amps (CCA) for automotive compatibility—values below 400A may struggle in sub-zero climates.
| Parameter | GPL-27T | Standard Flooded |
|---|---|---|
| Cycle Life | 500–800 | 200–400 |
| Self-Discharge | 1–3%/month | 5–10%/month |
Where is the GPL-27T commonly used?
Primary applications include automotive start-stop systems, marine electronics, and solar storage. Its vibration resistance suits off-road vehicles, while sealed construction makes it ideal for medical devices. Practically speaking, hospitals use GPL-27T batteries in mobile equipment carts due to zero maintenance. Warning: Don’t pair with alternators exceeding 14.8V—voltage spikes degrade AGM cells.
How should the GPL-27T be charged?
Use a three-stage charger (bulk/absorption/float) with 14.2–14.5V absorption and 13.2–13.8V float. Bulk charging at 10–30% of Ah capacity (2.7–8.1A for 27Ah) prevents overheating. For instance, a 5A smart charger refills 50% capacity in 3 hours. Pro Tip: Never charge below -15°C—risk of internal ice formation persists even with AGM’s low electrolyte volume.
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| Charger Type | Voltage | Current |
|---|---|---|
| AGM-Specific | 14.5V max | ≤8.1A |
| Generic | 15.5V max | Variable |
What maintenance does the GPL-27T require?
AGM batteries are maintenance-free but benefit from annual voltage checks (12.6–12.8V at rest). Clean terminals with baking soda to prevent corrosion. If stored, keep at 50% SOC and recharge every 6 months. Imagine a neglected GPL-27T dropping to 10.5V—sulfation becomes irreversible after 48 hours. Pro Tip: Use dielectric grease on terminals to block moisture ingress.
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FAQs
Yes, provided your charging system stays ≤14.5V. Retrofit kits may require vent tube adjustments—consult vehicle manuals for BMS compatibility.
Does the GPL-27T work with solar controllers?
Only MPPT/PWM controllers with AGM profiles. Bulk/absorb settings must align to 14.5V max—generic lead-acid modes risk undercharging.
How long does the GPL-27T last in storage?
Up to 12 months at 25°C when pre-charged to 12.8V. Store below 30°C—every 8°C rise doubles self-discharge rates.
