Trojan 31-AGM SV · Solar battery 12V 100Ah AGM
Specifications
| Brand | TROJAN |
|---|---|
| Part number | 31-AGM SV |
| Voltage (V) | 12 |
| Capacity (C20) | 100Ah (c20) |
| Capacity (C5) | 82Ah (c5) |
| Technology | AGM |
| Length | 325.00 mm |
| Width | 173.00 mm |
| Height | 238.00 mm |
€607.90
VAT included
Trojan 31-AGM SV 12V 100Ah 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
12 V
Capacity
100 Ah
Dimensions
325×173×238 mm
Technology
AGM
Weight
30 kg
Model
TROJAN AGM RELIANT
Tardó un poco más de lo habitual porque eran 8 baterías y vinieron por mensajería industrial.
Juan Francisco PerezMe atendieron muy bien
Pedro PerezNormalmente no compro en línea, pero ellos se encargan de dar un trato cercano y profesional. No me arrepiento de haber comprado en esta web
Iker Santiago
Reviews originally written in Spanish
Solar battery Trojan 31-AGM SV AGM Reliant 100Ah 12V
12VVoltage
100AhCapacity
30kgWeight
For off-grid photovoltaic installations and storage systems, the Trojan 31-AGM SV from the AGM Reliant range stores 100 Ah with AGM technology through daily charge and discharge cycles. It replaces the original battery without adaptation in off-grid PV systems with a 325 × 173 × 238 mm format: same 100 Ah capacity.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Optimised for daily charge and discharge cycles.
- Good tolerance to extreme temperatures.
- Long life on float and moderate cycling.
Will it fit your current battery tray?
It has external dimensions of 325 × 173 × 238 mm and weighs 30 kg. It uses 6 15 terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
What the Trojan 31-AGM SV is for
With 100 Ah, the Trojan 31-AGM SV stores the energy from your panels for the night and cloudy days. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 30 kg and 6 15 terminals.
The Trojan 31-AGM SV: AGM Reliant range and AGM technology
Within the Trojan catalogue, the AGM Reliant series groups the references designed for this use. The 31-AGM SV is the 100 Ah model of that family, with the same performance as its siblings in other sizes.
AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly.
Why choose Trojan batteries
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.
Official warranty
The Trojan 31-AGM SV 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.
Usage and maintenance tips
Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. In the darker months, check the voltage periodically and avoid full discharges.
Shipping, delivery and returns
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 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-31-AGM SV
Data sheet
- Brand
- TROJAN
- Reference
- 31-AGM SV
- Model
- TROJAN AGM RELIANT
- Voltage (V)
- 12
- Length
- 325.00 mm
- Width
- 173.00 mm
- Height
- 238.00 mm
- Weight
- 30 Kgs
- Technology
- AGM
- Terminal type
- 6 15
- Capacity (C20)
- 100Ah (c20)
- Capacity (C5)
- 82Ah (c5)
Specific References
- MPN
- 31-AGM SV
5,00/5
Latest reviews
Reviews originally written in Spanish
★★★★★Juan Francisco Perez
18/05/2026De un día para otro
Tardó un poco más de lo habitual porque eran 8 baterías y vinieron por mensajería industrial.
★★★★★Pedro Perez
26/01/2026Muy buen servicio
Me atendieron muy bien
★★★★★Iker Santiago
02/01/2026Atención telefónica ideal
Normalmente no compro en línea, pero ellos se encargan de dar un trato cercano y profesional. No me arrepiento de haber comprado en esta web
★★★★★Pablo Garcia
08/12/2025Recibí la batería al día siguiente
Tardó un poco más de lo habitual porque eran 8 baterias y vinieron por mensajería industrial.
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 31-AGM SV model AGM? What does this technology offer?
Yes. The 31-AGM SV from Trojan uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for devices with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.
How do I fit the 31-AGM SV 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.
How long does the Trojan 31-AGM SV battery last?
Expected lifespan of the Trojan 31-AGM SV is 5 to 8 years in mild-climate device use with Start-Stop. 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 are the measurements of the 31-AGM SV model?
Dimensions (length × width × height) are 325×173×238 mm — also written as 325x173x238 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.
Which batteries are equivalent to the Trojan 31-AGM SV?
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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