ONLINE LED STORE 12V DC 120 Amp Split Charge Relay Switch - 4 Terminal Relays for Truck Boat Marine

Works great for wiring a sub panel to an ignition switch so you don't kill your battery

I used it in a solar water heater project. I'm using PV panels to run power to a DC element in water heater tank. The red #8 wires coming in from the PV panels run thru the relay on to the element. I used a 12vDC transformer (wall wart) to run a small amount of power thru the thermostat on the water heater, then back up to the relay so the thermostat setting controls the relay, allowing power to flow from the roof panels to the DC element and heat water. Normal water heater thermostats are not rated for DC and will burn up the contacts in the thermostat fairly quickly. This relay is rated for 120amp (!) which is way overkill for the 20-30 amps or so my panels will send to the element, so this ought to last a long time.

I used this as a final cut off point between batteries and motor controller on an e-scooter. The motor was not able to handle low speed torque and it literally fried itself to a crisp. The controller and this relay were not affected by the high current draw.

Good quality works

Great relay. Build well