Trojan 27-GEL · Solar battery 91Ah GEL
Specifications
| Brand | TROJAN |
|---|---|
| Part number | 27-GEL |
| Voltage (V) | 12 |
| Capacity (C20) | 91Ah (c20) |
| Capacity (C5) | 76Ah (c5) |
| Technology | GEL |
| Length | 324.00 mm |
| Width | 171.00 mm |
| Height | 234.00 mm |
Trojan 27-GEL 12V 91Ah 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
Where it fits: the Trojan 27-GEL is one of our batteries for solar applications, belongs to our Trojan batteries and by capacity it sits among our 91Ah batteries.
The Trojan 27-GEL in practice
27-GEL vs Trojan 31-GEL
The Trojan 27-GEL offers 91 Ah and 0 A cold cranking in a 324 × 171 × 234 mm case. The Trojan 31-GEL, same brand and technology, goes up to 102 Ah and 0 A with 5 mm more length and costs €42.00 more. The difference shows on diesels and in hard winters; for a daily-driven petrol car the extra is not needed.

Solar battery Trojan 27-GEL 91Ah 12V
For off-grid photovoltaic installations and storage systems, the Trojan 27-GEL stores 91 Ah with GEL technology through daily charge and discharge cycles. It measures 324 × 171 × 234 mm, the format sought by anyone replacing a 91 Ah battery in off-grid PV systems.
- Long life on float and moderate cycling.
- Good tolerance to extreme temperatures.
- Optimised for daily charge and discharge cycles.
- GEL technology: gelled electrolyte, fully sealed and maintenance-free.
Will it fit your current battery tray?
In terms of format, the Trojan 27-GEL measures 324 × 171 × 234 mm (length × width × height) and weighs 29 kg. It uses 7 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.
What the Trojan 27-GEL is for
Designed for off-grid photovoltaic installations and storage systems, the Trojan 27-GEL tolerates extreme temperatures and long periods of low activity. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 29 kg and 7 terminals.
Technology inside the Trojan 27-GEL
The 27-GEL is one of the Trojan references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue.
In a GEL battery the electrolyte is gelled with silica: it is fully sealed, cannot spill and tolerates deep discharge very well. It is the preferred technology in electric mobility, marine service and heavy-cycling applications.
What Trojan does differently
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. All the Trojan batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Warranty and coverage
The Trojan 27-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.
Care and maintenance
GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. In the darker months, check the voltage periodically and avoid full discharges.
Delivery times 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.
Codes and references Trojan 27-GEL
| Brand | Trojan |
|---|---|
| Manufacturer range | TROJAN GEL |
| Manufacturer part number (MPN) | 27-GEL |
| Also known as | 27GEL · 27 GEL |
| EAN-13 barcode | 8404653001322 |
| Dimensions (length × width × height) | 324 × 171 × 234 mm (324x171x234) |
Other 91Ah batteries: We stock 3 models of 91 Ah to compare by price, technology and cold cranking: see all 91Ah batteries.
Recommended accessories
Compatible vehicles
The Trojan 27-GEL fits 22 vehicles. Most searched below:
Frequently asked questions
Is the 27-GEL model a gel battery? Where is it used?
Yes. The Trojan 27-GEL is GEL: sealed lead-acid in which the electrolyte is a gel. Designed for cyclic use (solar installations, motorhomes, electric wheelchairs, motorcycles), it tolerates deep discharges very well. It needs a GEL-specific smart charger: its maximum charge voltage is lower than that of an AGM.
What are the dimensions of the Trojan 27-GEL battery?
Check the room available in your device, because a single millimetre too much can stop the clamp from closing. Its dimensions are 324×171×234 mm, also written 324x171x234 mm; the height already includes the terminals.
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