How to use load function on solar charge controller?

[ewarnerusa]

Hello,
I have never quite understood how the load function works on many solar charge controllers. For example, I'm looking at a 60A rated MPPT controller that offers a load function up to 20 amps. I know what a diversion load or dump load is to divert unused current into a heating element. But I don't think that is what these typical load functions on solar charge controllers do. Can someone explain it for me? Thanks!

[SunEagle]

Usually the "load" output on a charge controller is for some low wattage lighting. Turning on the output is different for each controller.

[Bala]

I have a controller in my off grid system just for the load function. With this controller i can set low v cut out and a cut in v. Essentially i use it to switch off the non critical loads if there is not enough sun.

Using relays and contactors i run a 240v pump on a timer, a 24v to 12v reducer, a 24 night light and v meter.

[littleharbor2]

I have a controller in my off grid system just for the load function. With this controller i can set low v cut out and a cut in v. Essentially i use it to switch off the non critical loads if there is not enough sun.

Using relays and contactors i run a 240v pump on a timer, a 24v to 12v reducer, a 24 night light and v meter.

Sounds like a Trace/Xantrex C series controller in "Load Control" mode.

For the loadout function on small charge controllers are meant for small, many times, timer controlled loads. Don't ever connect a big load like an inverter to this output, go straight to the battery.

[Bala]

Sounds like a Trace/Xantrex C series controller in "Load Control" mode.

For the loadout function on small charge controllers are meant for small, many times, timer controlled loads. Don't ever connect a big load like an inverter to this output, go straight to the battery.

No, its a Plasmatronics PL40. The load function is controlling coils on relays, so only milliamps of load on the circuit.

[ewarnerusa]

I have a controller in my off grid system just for the load function. With this controller i can set low v cut out and a cut in v. Essentially i use it to switch off the non critical loads if there is not enough sun.

Using relays and contactors i run a 240v pump on a timer, a 24v to 12v reducer, a 24 night light and v meter.

What is the trigger for when load function comes on/off?

[Bala]

What is the trigger for when load function comes on/off?

I have it set to turn off at 24v

It will not turn back on until 28.2v

It also had a 10 minute time delay, so a spike to low or high setting will not trigger.