SI Switch · Smart Energy Control

Turn any circuit into
an intelligent solar load.

SI Switch transforms ordinary electrical circuits into energy-aware devices that automatically operate when solar is available — reducing grid consumption, protecting battery reserves and improving the return on your solar investment. No appliance replacement required. Retrofits into your existing installation.

Talk to an installer Buy Now →

SI Switch — live relay status and power draw

Live · Lounge Underfloor

Running

Heater Mode · ECM auto

Power Draw

2,421 W

241 V · 10.0 A3.8 kWh today

7-Day Consumption

16.08 kWh

Tracked · Solar served first

Live demo — no hardware needed

See your geyser switch on solar. Right now.

Watch SI Switch automatically turn the geyser on when solar surplus is available — then power it down when the sun drops. The ECM score, prepaid tracker and full portal, live. No account, no hardware.

✨ Try it live

Opens instantly · No sign-up

What SI Switch does

More solar used. Less wasted. Less bought.

☀️

Maximise Solar Self-Consumption

Automatically runs loads when excess solar is available, reducing reliance on Eskom and improving the return on your solar investment. The load only runs when the energy is already there — no expensive grid top-ups required.

💰

Lower Electricity Bills

Uses available solar energy first. Every kWh consumed from surplus solar is a kWh that doesn't come from the grid — at your current municipal tariff rate. Across a pool pump, geyser or heat pump, that adds up fast.

⚡

Intelligent Energy Decisions

Powered by the SI Energy Comfort Margin (ECM), the switch makes real-time decisions based on your solar production, battery status, household demand and grid conditions — not a fixed timer that doesn't know what the sun is doing.

📱

Full Remote Control

Monitor power consumption, override schedules, switch the load on or off and receive alerts — from anywhere, using the SI Portal app. No VPN, no IT setup.

🔔

Smart Notifications

Receive push alerts when the load starts or stops, when abnormal power draw is detected, or when the device requires attention. Know what's happening without being there.

🛡️

Fail-Safe Local Operation

All automation logic runs on the device itself. If internet connectivity is lost, the switch continues operating against its last-known schedule and ECM state — no cloud dependency for the core function.

🔧

Easy Retrofit Installation

Installs into existing electrical systems without replacing appliances or rewiring. A qualified installer can have it commissioned in under an hour. No new equipment to purchase — your existing load becomes the smart load.

📊

Energy Monitoring

On-board energy metering tracks real power draw and accumulated consumption. Review daily kWh consumed, operating hours and estimated cost savings in the SI Portal app.

Typical Applications

Any load that benefits from knowing when solar is available.

If it draws power, runs on a schedule, and doesn't care exactly when it runs — SI Switch can make it smarter.

🏊

Pool Pumps

Run your pool on solar and let the app tell you when the filter is dirty or the pump is running dry — using power draw alone, no extra sensors.

🚿

Geysers

Heat water using available solar energy instead of expensive grid power. One of the highest-return applications — geysers are typically the biggest single load in a home.

🌡️

Heat Pumps

Optimise operation to maximise solar usage and minimise battery drain. Heat pumps draw significant current — running them on surplus solar instead of the battery extends battery life.

🏠

Underfloor Heating

Automatically heat the slab during periods of surplus solar generation. The thermal mass holds the heat long after the circuit switches off — smart operation, comfortable results.

💧

Water Pumps

Intelligently manage boreholes, irrigation and transfer pumps. Fill tanks or run irrigation during the solar peak — the timing is automatic, the savings are real.

⚡

Electric Heaters

Use available solar energy to maintain comfort without excessive grid consumption. Pre-heat the room during the solar window instead of drawing from battery or grid in the evening.

🔌

General Loads

Any appliance or circuit that benefits from intelligent scheduling and energy-aware control. If it can wait for the sun, SI Switch can make that happen automatically.

App Preview

SI Switch in your pocket.

Monitor live power draw, override automation, review consumption history and receive alerts — all from the SI Portal app.

SI Switch — live relay status, 2421W, Heater Mode

Relay ON · 2,421 W · Heater Mode

SI Switch — operating mode selector and 4-window timer schedule

Operating modes & 4-window timer schedule

SI Switch — 7-day energy summary, 16.08 kWh consumed

7-day summary · 16.08 kWh consumed

App Store is a service mark of Apple Inc., registered in the U.S. and other countries.

Pool Pump Mode

It doesn't just save electricity. It saves your pump and your pool.

Pool Pump Mode turns SI Switch into an active pool health monitor. Most pool owners backwash on a fixed schedule — wasting thousands of litres of water whether the filter needs it or not. SI Switch watches the pump's power draw in real time. A clean filter allows free water flow and the pump draws full wattage. As the filter loads up, flow drops and so does the power. When it falls below your threshold, the app flags it as Dirty. Backwash only when it's actually needed — not before, not after.

💧

Save thousands of litres a year

Backwash only when the filter is actually dirty — not on a guess or a fixed weekly schedule.

🏊

Protect your pool water quality

A blocked filter strains the pump, reduces circulation and compromises water chemistry. Know the moment it needs attention.

Dry Run Protection addresses the number one cause of pool pump failure worldwide. Suction loss, a clogged skimmer basket, a closed valve or a low water level — all result in the pump running without water. Most homeowners only find out when the motor burns out. SI Switch detects near-zero current draw while the pump is running and cuts power before damage occurs. A configurable grace period allows for normal priming so you don't get false trips.

🛡️

Save thousands of rands on pump repairs and replacements

Pool pump replacements routinely run R3,000–R8,000 installed. Dry run is the leading cause. Built-in protection costs nothing extra and runs silently in the background every time the pump is on.

SI Switch Pool Pump Mode — Filter Status: Clean, 272W draw, pump ON

✓ Filter clean · 272 W

SI Switch Pool Pump Mode — Filter Status: Dirty, wattage below threshold

⚠ Filter dirty · clean needed

SI Switch Pump Mode settings — filter threshold, dry run protection, grace period

Settings · threshold & dry run

🔍 No extra sensor needed

Power draw is the sensor. Clean filter = free flow = full watts. Dirty filter = restricted flow = fewer watts. The metering already built into SI Switch does all the work.

💧 Backwash only when needed

A typical backwash uses 400–600 litres of water. Do that weekly on a schedule instead of on demand and you waste tens of thousands of litres a year for no reason.

⚙️ Set once, forget

Dial in your filter's clean threshold and dry run grace period from the app. SI Switch monitors silently every time the pump runs — no manual checks required.

The Hardware

DIN rail. Wi-Fi. 63 A.

SI Switch is built around a proven DIN-rail smart relay with real-time power monitoring. It clips directly into your distribution board and connects to the SI Portal over Wi-Fi — no additional hubs, no rewiring.

SI Switch DIN rail relay — Tongou TO-Q-SY2-JWM, 63A, Wi-Fi, power monitoring

63A DIN rail relay · Wi-Fi

SI Switch retail box with Solaire Intelligence branding

Retail packaging

Rated current 63 A

Supply voltage 100–240 V AC

Connectivity Wi-Fi 2.4 GHz

Monitoring Real-time power

Form factor DIN rail (35 mm)

Installation Certified electrician

Order online

SI Switch

R1,350 incl. VAT

🚚 R160 shipping in SA

✓ SI Switch DIN rail relay unit
✓ 63A · 100–240V · Wi-Fi 2.4GHz
✓ SI Portal app access (iOS)
✓ 4-window timer + ECM auto mode
ℹ Requires DB installation by your electrician

Secured by Yoco · Card & instant EFT accepted

Add to cart to bundle with other products, or buy directly.

Not a timer. An energy decision.

Traditional smart switches run on fixed timers. SI Switch runs on the Energy Comfort Margin (ECM) — a real-time score that combines solar production, battery state of charge, household load and grid conditions into a single number from 0 to 20. When the score is high enough, the load runs. When conditions change, it stops. Automatically.

16–20

Strong surplus — run all loads

8–15

Moderate — priority loads only

0–7

Low — loads suppressed

Learn more about ECM →

Technical Specifications

Everything the installer needs to know.

Controller	Wi-Fi MCU, on-device firmware
Energy metering	On-board energy meter — real W, kWh & power factor
Output	Relay contact — configurable load circuit
Automation	ECM-driven + up to 4 manual schedule windows per day
Connectivity	Wi-Fi 2.4 GHz · MQTT · SI Portal cloud
Power supply	220 V AC, ~1–2 W idle
Local intelligence	Continues operating if internet is unavailable
Remote access	SI Portal app — monitor, control & notifications
HA integration	Auto MQTT discovery, no YAML required
Dry-run protection	Available for pump applications
Maintenance mode	Suspend automation during servicing
Origin	Made in South Africa

Turn any circuit into
an intelligent solar load.