Description
The Trojan J305-AES is a 6-volt, 279 Ah agm (trojan aes) battery for house loads such as electronics, lighting and pumps. It weighs about 95 lb, so plan for a secure, vented battery box and a solid hold-down. The case follows a BCI 902 footprint; confirm your tray size and terminal orientation before you buy. Reserve capacity is 603 minutes at a 25 A draw. The sealed AGM design is maintenance-free and spill-resistant.
Highlights
- 6 V, 279 Ah AGM (Trojan AES)
- BCI 902 footprint
- 95 lb
- Best for: House Bank
Specifications
| Brand | Trojan |
|---|---|
| Model / SKU | J305-AES |
| Nominal voltage | 6 V |
| Capacity | 279 Ah (20-hr rate) |
| Chemistry | AGM (Trojan AES) |
| Reserve capacity | 603 min @ 25 A |
| BCI group size | 902 |
| Dimensions (L × W × H) | 11.66 × 6.94 × 14.09 in |
| Weight | 95 lb |
| Reserve minutes | @25 Amps / 603; @75 Amps / 176 |
| Energy | 1.92 kWh (20-hr) |
| Operating temperature | -40°F to 140°F (-40°C to 60°C) |
| Terminal options | Automotive Post & Stud Terminal DT, M8 Insert, M8 with LT Adapter |
Specs are from the manufacturer. Check your boat’s battery compartment, terminal layout and charging system before you order.






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