ESM ULTRA 31/1800

You live in your truck, you work in your truck, but your batteries don’t always start your truck. In cold or freezing weather, after a night of running hotel loads on batteries or sitting in line at a weigh station with anti-idle laws, your batteries frequently do not have the power needed to start your engine.

Don’t leave starting to batteries. The Engine Start Module from Maxwell Technologies will provide the power to start your truck consistently, for the life of your truck.

Replace a battery or add the Engine Start Module to a heavy duty truck for reliable starting from -40°F to 149°F (-40°C to +65°C)

Features and Benefits

  • 1800 Cold Cranking Amps (3-sec start) provides Engine Start reliability
  • No lead. No acid
  • Improves overall system power performance
  • Shock & vibration resistant
  • Built-in overcharge protection
  • Low total cost of ownership
  • Cold weather reliability down to -40°F
  • Faster cranking
  • Industry standard BCI Group 31 form factor
  • Recharges fully in less than 15 minutes
  • Long-life - limited 4 year full replacement warranty**
Voltage Input voltage (B+) 10 - 18 V
Output voltage (max.) 16.2 V
Cold cranking amps1 1800 CCA (3 sec. crank)
Peak power2 32.8 kW
Maximum recharge time 20 minutes (recharge from battery at 10 A)
BCI Group 31
13”L x 6 13/16” W x 9 7/16” H
(330mm L x 173mm W x 240mm H)
Terminals SAE 3/8"-16 UNC, 3 each
Environmental Design for heavy truck battery box environments
Weight 21 lbs (9.5kg)
Current draw 25 A max. (from battery)

1. CCA = C x (Vmax - Vmin) / (T + C x ESR)
2. Peak Power = V2max / (4 x ESR)
3. The vehicle starter solenoid must be the only connection to the STARTER+ terminal. May require new wire to connect cab loads/alternator to batteries.
C = 1000 F (min.) | Vmax = 16.2 V (for 0° C) | Vmin = 7.2 V (per SAE)
T = 3 sec. | ESR = 0.002 Ohm (max.)