Trojan 31-AGM · Solar battery 100Ah AGM

Solar battery Trojan 31-AGM 100Ah 12V

The 12 V, 100 Ah Trojan 31-AGM solar battery with AGM technology is designed for off-grid photovoltaic installations and storage systems. Measuring 341 × 173 × 233 mm, it is the direct replacement for off-grid PV systems fitted from the factory with a 100 Ah battery of this format.

• AGM: faster recharging and better cycle resistance than a conventional battery.
• Low self-discharge during the darker months.
• Maintenance-free in off-grid installations.
• Compatible with common MPPT and PWM controllers.

What the Trojan 31-AGM is for

With 100 Ah, the Trojan 31-AGM 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 31 kg and 6 terminals.

Technology inside the Trojan 31-AGM

The 31-AGM 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 an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.

Will it fit your current battery tray?

The Trojan 31-AGM is made in the 341 × 173 × 233 mm format and weighs 31 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.

Why choose Trojan batteries

Founded in 1925 in California, Trojan invented the golf cart battery and remains the standard in deep-discharge applications that demand thousands of cycles. We guarantee that every Trojan arrives new, charged and with the manufacturer's full warranty.

Usage and maintenance tips

Size the installation so as not to discharge the battery more than 50% daily and set the controller to the battery technology. In the darker months, check the voltage periodically and avoid full discharges.

Manufacturer's warranty

The Trojan 31-AGM 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.

Shipping, delivery and returns

Same-day dispatch from our warehouse for in-stock orders placed before 6:00 pm: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for 14 days if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.