CTEK D250SE 20A Onboard Dual Input Charger (40-315)

CTEK 40-315 D250SE 20A Onboard Dual Input Charger is a powerful, fully automatic 5-step charger designed for charging 12V lithium or lead-acid service batteries from 40–300Ah while on the move. Its dual input supports alternator, solar, and wind power sources, and it automatically maintains both service and starter batteries for optimal performance. Ideal for vehicles without mains power access, it features selectable charging modes and built-in temperature compensation for all-weather reliability.

Features:

• Dual input (alternator and solar in parallel).
• Smart alternator compatible.
• Selectable lithium* and lead-acid charge modes.
• Temperature sensor for optimized charging.
• Splash and dustproof (IP65 rated).

Benefits:

• Maximizes battery capacity without mains power.
• Maintains both service and starter batteries automatically.
• Works in all weather conditions with temperature compensation.
• Efficient MPPT solar regulator for optimal solar power use.
• Safe, reliable, and compact for onboard installation.

Technical Specifications:

• Model: 40-315
• Input: 11.5–23V, 25A
• Output: Max 14.4/14.2/14.7V, 20A
• Battery Types: 12V WET, EFB, Ca/Ca, MF, AGM, GEL, LiFePO4
• Battery Capacity: 40–300Ah
• Protection: IP65 (splash and dustproof)
• Ambient Temperature Range: -4°F to +122°F (-20°C to +50°C)
• Warranty: 2 years