Trojan 8V-GEL · Solar battery 8V 140Ah GEL
Specifications
| Brand | TROJAN |
|---|---|
| Part number | 8V-GEL |
| Voltage (V) | 8 |
| Capacity (C20) | 140Ah (c20) |
| Capacity (C5) | 114Ah (c5) |
| Technology | GEL |
| Length | 262.00 mm |
| Width | 181.00 mm |
| Height | 276.00 mm |
€841.10
VAT included
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Trojan 8V-GEL 8V 140Ah is a solar battery designed for PV systems with daily charge/discharge cycles. Tolerates extreme temperatures well, with low self-discharge during winter shutdowns or between stays at vacation homes.
Why this solar battery?
- Designed for solar systemsoptimised for daily charge/discharge cycles
- Handles extreme temperaturesin technical rooms or outdoor installs
- Minimal self-dischargewhen left idle over winter or holidays
Voltage
8 V
Capacity
140 Ah
Dimensions
262×181×276 mm
Technology
GEL
Weight
32 kg
Model
TROJAN GEL
Solar battery Trojan 8V-GEL 140Ah 8V
8VVoltage
140AhCapacity
32kgWeight
For off-grid photovoltaic installations and storage systems, the Trojan 8V-GEL stores 140 Ah with GEL technology through daily charge and discharge cycles. Its 262 × 181 × 276 mm make it the exact replacement for the 140 Ah battery fitted as standard to many off-grid PV systems.
- Low self-discharge during the darker months.
- GEL: excellent resistance to deep discharge and long cycle life.
- Compatible with common MPPT and PWM controllers.
- Maintenance-free in off-grid installations.
What the Trojan 8V-GEL is for
The Trojan 8V-GEL is designed for off-grid photovoltaic installations and storage systems. Size the capacity so as not to discharge more than 50% daily and you will greatly extend its life. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 32 kg and 6 terminals.
Technology inside the Trojan 8V-GEL
Trojan builds the 8V-GEL to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position.
GEL technology fixes the acid in a solid gel. That removes maintenance and leaks and gives very long cycle life, in exchange for slightly slower recharging and lower peak current than an AGM.
Size, terminals and hold-down of the Trojan 8V-GEL
In terms of format, the Trojan 8V-GEL measures 262 × 181 × 276 mm (length × width × height) and weighs 32 kg. It uses 6 terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.
Trojan: the maker behind the 8V-GEL
Trojan Battery is the world reference in deep-cycle batteries: golf carts, cleaning machines, aerial platforms and solar systems rely on its T2 technology and longevity. We guarantee that every Trojan arrives new, charged and with the manufacturer's full warranty.
Care and maintenance
Size the installation so as not to discharge the battery more than 50% daily and set the controller to the battery technology. GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte.
Manufacturer's warranty
The Trojan 8V-GEL comes with the manufacturer's official warranty against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you.
When you get it and how to return it
Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.
BCOM-TROJAN-8V-GEL
Data sheet
- Brand
- TROJAN
- Reference
- 8V-GEL
- Model
- TROJAN GEL
- Voltage (V)
- 8
- Length
- 262.00 mm
- Width
- 181.00 mm
- Height
- 276.00 mm
- Weight
- 32 Kgs
- Technology
- GEL
- Terminal type
- 6
- Capacity (C20)
- 140Ah (c20)
- Capacity (C5)
- 114Ah (c5)
Specific References
- MPN
- 8V-GEL
4,81/5
Verified purchasesLatest verified reviews
★★★★★Martin Gallardo
15/06/2026Buen asesoramiento
Gracias a baterias.com pude elegir la batería más adecudada para mi vehículo
★★★★★Hector Reyes
19/01/2026Oye, un 10
Recomiendo esta web, excelente servicio
★★★★★Domingo NuÑez
16/01/2026No sabía que el asesoramiento era gratis, de 10
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★★★★★Jose Antonio Rojas
16/01/2026Recibí la batería en 1 día
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12/10/2025Me asesoraron en la batería
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Recommended accessories
How to change the battery
Guide to replace a cyclic battery (12V 4-30Ah) for UPS, mobility scooter, alarm or backup device. Estimated time 10-15 minutes. Important: discharge residual voltage before handling.
Step 1. Power off and unplug the device
Unplug the device (UPS, scooter, alarm) and leave it off for at least 30 seconds to discharge residual capacitor voltage. Work on an insulating surface.
Step 2. Locate the battery compartment
Usually under the seat (mobility scooter/wheelchair), in the rear module of the UPS, or behind a side panel with screws. Check the device manual for unusual models.
Step 3. Disconnect the negative (−) first
With insulated gloves, remove the negative (−) cable first. Some UPS have protection fuses — note their position before removing.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Typical weight 1-15 kg depending on capacity. Many cyclic batteries are AGM/GEL — keep them upright. Do NOT invert the battery: even sealed, residue may exist.
Step 6. Fit the new battery
Same orientation and type (AGM, GEL or flooded). Polarity must match the device, not a chassis (this is not a car). Make sure terminals do not touch metal parts of the compartment.
Step 7. Connect the positive (+) first
On cyclic devices the order is reversed compared to cars: positive (+) first, negative (−) afterwards. Tighten without forcing — the plastic terminal housing of cyclic batteries damages easily.
Step 8. Initial charge before first use
Cyclic batteries ship at 60-80%. Before first use, connect the device charger for 8-12 hours (or use an AGM/GEL smart charger if available). This avoids short cycles and extends lifespan.
Frequently asked questions
Is the Trojan 8V-GEL a GEL battery? What is GEL used for?
Yes, this model is a GEL battery: sealed lead-acid where the electrolyte is in gel form. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). Requires a GEL-specific smart charger — max charge voltage ~14.1 V (vs 14.4-14.7 V for AGM). Lifespan 6-10 years.
How do I fit the 8V-GEL model in my device?
In most devices it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On devices with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.
What is the service life of the 8V-GEL model?
Expected lifespan of the Trojan 8V-GEL is 6 to 10 years in cyclic use (marine, caravan, solar) with controlled discharges. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.
What size is this battery?
Dimensions (length × width × height) are 262×181×276 mm — also written as 262x181x276 mm — following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.
What are the equivalents of the 8V-GEL model?
Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop devices. See the "Equivalents" section to view recommended options at the same performance level.
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