How to Choose an Irrigation Controller: Stations, Power & Connectivity

How to Choose an Irrigation Controller

Choosing an irrigation controller starts with a few practical questions: How many zones need to be controlled? Is mains power available? Will the controller be installed outdoors or inside a valve box? And do you need remote or smart control?

Two controllers can have a similar station count while being designed for completely different installations. A conventional 230 VAC wall-mounted controller, for example, should not be treated as interchangeable with a battery-operated controller designed for DC latching solenoids.

This guide explains the main differences to check before ordering.

1. Start with the number of irrigation zones

Each independently controlled irrigation zone normally requires a controller station.

If the system currently has four valves operating as four separate zones, you generally need at least four available stations. If expansion is planned, choosing additional station capacity at the beginning can avoid replacing the controller later.

For example, Hunter's X2 family is available in 4-, 6-, 8- and 14-station configurations. The X2-401-E is the four-station 230 V version, while X2-601-E and X2-801-E increase the station capacity to six and eight respectively.

Flow Supply Store links:
Hunter X2-401-E · Hunter X2-601-E · Hunter X2-801-E

2. Determine whether mains power is available

The next major distinction is between mains-powered controllers and battery-operated controllers.

A wall-mounted controller such as the Hunter X2 or Rain Bird ESP-RZXe uses mains input power and provides low-voltage outputs for irrigation valves. Rain Bird's international ESP-RZXe outdoor models are available in 4-, 6- and 8-station versions using 230 VAC input and 24 VAC outputs. Rain Bird

Battery-operated controllers are designed for locations where electrical power is unavailable or impractical, such as remote valve boxes, isolated landscape zones or retrofit installations.

The Hunter NODE-100, for example, is a single-station battery controller supplied with a DC latching solenoid. Hunter specifies DC latching solenoids for the NODE and states that conventional 24 VAC solenoids will not operate with it.

Hunter NODE100 Battery-Operated Controller

This distinction is important: a battery-operated controller is not automatically a drop-in replacement for a conventional AC controller simply because the number of stations matches.

3. Check the solenoid and valve requirements

The controller and valve electrical requirements need to match.

Conventional irrigation controllers commonly operate AC solenoids, while many battery controllers use DC latching solenoids that require only a short electrical pulse to change state.

According to Toro's documentation, the TEMPUS DC LCD range uses 9 VDC latching outputs and is designed for locations without a conventional power supply. Toro Equipment and Irrigation

Toro TEMP-1-DC-L Battery Controller

Before ordering a replacement controller, check the existing controller model and the solenoid type fitted to the valves.

4. Decide whether you need smart control

Not every irrigation system needs Wi-Fi.

For a simple installation with predictable schedules, a standalone controller may provide everything required. Remote connectivity becomes more useful when users need to adjust schedules from another location, manage multiple properties or monitor irrigation without accessing the controller physically.

There are also important differences between Bluetooth and Wi-Fi/cloud connectivity.

Toro's TEMPUS DC uses integrated Bluetooth, allowing compatible models to be programmed locally through the TEMPUS app without requiring a permanent internet connection.

Hunter's X2 follows a different approach. The base X2 is a conventional controller, while adding the optional WAND module provides Bluetooth and Wi-Fi connectivity for Hunter's Hydrawise platform. The WAND module should therefore not be assumed to be included with a standard X2 controller unless the product listing explicitly says so.

Rain Bird's ESP-RZXe is also listed as LNK2 WiFi Ready, meaning smart connectivity depends on the appropriate compatible accessory rather than being something to assume from the controller name alone.

5. Check where the controller will be installed

Installation environment matters almost as much as station count.

A controller mounted inside a building has different enclosure requirements from one installed on an exterior wall. Battery-operated controllers may go even closer to the irrigation hardware.

Toro describes TEMPUS DC as an IP68 waterproof controller intended for applications where mains electricity is unavailable, including installation close to the valve system.

The Rain Bird ESP-RZXe family, meanwhile, distinguishes between indoor and outdoor models in its international range.

Always match the exact model suffix and enclosure, rather than assuming every controller within a product family has the same installation rating.

6. Think about future expansion

A four-station controller may be completely appropriate for a four-zone residential system, but future expansion can change the calculation.

Before ordering, consider whether the project may later add turf areas, planting zones, drip irrigation or other independently controlled sections.

Also check whether expansion is achieved by buying a larger fixed controller or by installing expansion modules. Expansion modules are controller-family specific and should never be assumed to work with another controller simply because the station count or connector looks similar.

Which type should you look at?

For a standard outdoor AC-powered system, start by comparing controllers such as the Hunter X2 and Rain Bird ESP-RZXe.

For a remote location without mains electricity, battery-operated platforms such as Hunter NODE or Toro TEMPUS DC are more relevant.

For remote internet management, check whether the controller has built-in connectivity or requires an additional module such as Hunter WAND or Rain Bird's compatible Wi-Fi accessory.

The deciding factor should always be the complete installation—station count, voltage, solenoid type, enclosure, connectivity and system requirements—not just the controller brand.

Before ordering

Record the existing controller model, number of active zones, power supply, valve/solenoid type and installation location. For replacement projects, preserving the existing electrical architecture is generally safer than choosing a different controller type based only on features.

Browse the full Controllers & Timers collection to compare current models from Hunter, Rain Bird, Irritrol and Toro.