IBC tote rain collection wired with pump

I'm wanting to put in an IBC tote for supplying my raised flower bed and future vegetable bed rows. Curious how I could wire in a pump to turn on with the sprinkler multi-zone timer I intend to hook up to it.

what about doing solar?

Some irrigation timers have a 'master valve' output intended for a main valve that is upstream of the individual zone valves

An appropriately specced relay controlled by this output could power the pump, or I suppose the relay could be wired to all the indivividual zone outputs..

You would be wise to include a float switch in the circuit to protect your pump from burning up when the water runs out!

Solar, could work based on location, but will it have enough oomph? I don't even know how much water pressure will come out without a pump. However one raised flower bed is about 15 feet away and is maybe 20x15. I was going to put sprayers on that one. The other is going to be one long raised vegetable bed 18 inches x 100 feet or so so there's just one irrigation line. Then on the fence (where the bed is anchored to) I was going to put rain gutters there for strawberries and lettuce and other small rooted plants with one line per gutter. If i didn't need one then great, but I guess I'll have to see if it needs to be done first. I just don't want my irrigation timer/valve device to switch on and not have enough to matter.

I've seen the relay thing online too, but I'm terrible imagining these things. If I saw a wiring diagram I could put it together.