Trojan 31-AGM battery for solar energy storage, rated 100Ah 12V

In short: Spec sheet headline for the Trojan 31-AGM: 100Ah 12V, made with solar power systems in mind. Measure twice, order once: dimensions decide most swaps.

Trojan 31-AGM: what it is and who it suits

Spotted Trojan 31-AGM on your installer's plan? That is the code to search. Deep-cycle construction lets it be drained and refilled daily. Plenty of off-grid owners compare batteries online before renewing a bank.

100Ah suits engines with modest electrical demands.

Before you order: a quick checklist

• ✓ Chemistry: AGM. Some vehicles and chargers are programmed for a specific type, so check before swapping.
• ✓ Check 341 × 173 × 233 mm against the tray, not just the old battery.
• ✓ Capacity 100Ah: equal to or a little above your old label is ideal.

Measurements, ratings and codes

Your questions answered

Care tips for AGM batteries

Glass-mat batteries are sealed, with small valves that only open if pressure builds up. Backup systems rely on AGM because it can wait, fully charged, for years without fuss. Keep AGM batteries away from sustained heat, which shortens their life.

More options

Finished comparing? Placing your order online takes a couple of minutes. Recycling the old battery is easy at most tips and garages.

• Other batteries for solar power systems
• All Trojan products on baterias.online

Fitting and everyday care

Holiday homes off the grid often sit unused for months between visits. Read the resting voltage of each battery once a month and note it down. Sitting partly charged for weeks lets sulphation take hold in lead batteries.