Triple Battery Advanced Automatic Charging Relay (ACR) - 24VTwo Independent ACRs in One Device reduce installation space and time. Significantly lowers the out-of-state current draw.Features: Eliminates Dead Start Batteries by sharing charge sources with all batteries and isolating batteries when no charge sources are present Simple Robust Installation:Integrated sealed plug eliminates corrosion, includes DT04 harness. A single device reduces installation time, space, cost, and points of potential failure An additional low-amp output can be used to report device status remotely. Bullet-proof Construction: Sealed unit, high-temperature materials allow mounting anywhere. Integrated thermal overload shutdown protection Ultra Low Off-State Current: Compare two typical ACRs (20 mA) vs Dual ACR @ 1.3 mA Adjustable Off-Voltage for Auxiliary Battery Priority provides the ability to share start battery energy for auxiliary without risking engine starting ability. Start/Engine Isolation input option for ensuring sensitive electronics do not experience voltage sags and spikes from the cranking event. Start Assist input option to ensure maximum cranking amps available when necessary. 4 Year Industry-Leading Warranty table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Truck Freight: No Oversized: No