TOMZN TOB9DC-63 Smart WiFi DC Breaker & Timer Switch for Solar & Battery (8–90V DC, 63A)

Smart WiFi DC Breaker & Timer Switch for Solar & Battery Systems in Pakistan

As solar installations multiply across Pakistan, one weak link keeps showing up: the DC side of the system has no smart control. Your panels, charge controller and battery bank run through ordinary DC MCBs that can only be flipped by hand, usually mounted on a rooftop combiner box or inside a DB you can’t reach. The TOMZN TOB9DC-63WIFI Smart DC Breaker changes that. It is a genuine WiFi DC breaker and timer switch, built for direct current, that you turn ON or OFF from your phone and automate with schedules.

This is not an AC WiFi breaker. It is engineered specifically for 8V–90V DC circuits, making it one of the few smart DC switches available in Pakistan for solar PV strings, 12V/24V/48V battery banks, DC lighting and off-grid loads. If you also need to monitor and control your AC mains, see our full Smart Circuit Breaker & Energy Analyser Meters category.

What This Product Is For: Remote Switching & Timers

The core job of the TOB9DC is simple and powerful: remote ON/OFF control and automatic timer-based switching of a DC circuit. Instead of walking to the DB or climbing to the roof every time you want to isolate a solar string or a battery line, you do it from the Tuya app on your phone, from anywhere. And instead of remembering to switch a DC load on and off, you let the built-in timers do it on a fixed schedule, a countdown, or a repeating loop.

Why a DC-Specific Breaker (Don’t Use an AC Breaker on Solar)

This is the single most important thing our technical team tells every solar customer. DC current does not cross zero like AC does, so the arc created when you break a DC circuit behaves very differently. A breaker meant for AC is not designed for that, which is why you should never force an AC breaker onto a DC solar string. The TOB9DC is purpose-built for continuous direct current. Always match the breaker to the current type.

8-90V DC Solar & Battery Remote Breaker

Key Features at a Glance

• Remote ON/OFF: turn your solar or battery circuit on and off from anywhere via the Tuya / Smart Life app
• Three timer modes: fixed schedule, countdown timer, and cycle (loop) timing for repeating DC loads
• True DC operation: 8V to 90V DC working voltage, 1A–63A rated current
• Voice control: pairs with Amazon Alexa and Google Assistant
• Relay last status memory: returns to its previous ON/OFF state after a power cut
• Child lock: disable the physical button remotely so no one can change the circuit state
• Scenario automation: link to other Tuya devices with “if this then that” rules
• Built tough: flame-retardant housing, tunnel-type terminals for secure high-current contact, –25°C to +70°C operating range
• Easy install: single-pole (1P), standard 35mm DIN-rail mount, CE marked

Technical Specifications

Where to Use It: Real Pakistani Use Cases

How It Differs From a Standard Solar DC Breaker

App Setup: Get Running in Minutes

1. Download the Tuya Smart or Smart Life app from the Play Store or App Store and create a free account.
2. Make sure your phone is connected to a 2.4GHz WiFi network. This breaker does not support 5GHz, so on dual-band routers select the 2.4GHz band.
3. Mount the breaker on the 35mm DIN rail. Wire power input to the top terminals (+/–) and load output to the bottom terminals (+/–), observing correct DC polarity.
4. Press the orange manual button so the breaker is powered, then tap “Add Device” in the app and follow the pairing prompts.
5. Once paired, you can rename it, set your timers and schedules, enable child lock, and add it to Alexa or Google Assistant.

Installation note: DC circuits at solar and battery voltage carry real current. We strongly recommend installation by a qualified solar technician or electrician. Always observe correct +/– polarity.

Build a Complete Smart Setup

The TOB9DC handles the DC side. To automate the rest of your home or office, pair it with other Omni Smart devices:

• Smart Circuit Breaker & Energy Analyser Meters for AC mains monitoring and control
• Timer Switch for Water Pump for scheduled AC pump operation
• Electric Geyser Timer Device to automate your geyser on a schedule
• Smart Plugs & WiFi Sockets for plug-in appliances
• Smart Home Automation Sensors to trigger devices automatically
• Zigbee Automation Devices for a wider mesh network
• WiFi CCTV Cameras to keep an eye on your solar setup and property

Why Buy From Omni Smart

Omni Smart has been Pakistan’s smart home specialist since 2015, with 5,000+ installs nationwide. We don’t just ship boxes. Our team understands solar and DC systems, and we’ll help you confirm this breaker matches your setup before you order. Browse our full range in the Omni Smart, or reach us through the contact page. Every TOMZN TOB9DC-63 comes with a 1-year warranty, cash on delivery across Pakistan, and genuine after-sales support on WhatsApp.

Frequently Asked Questions

What is the main purpose of this breaker?
Remote switching and timer automation of a DC circuit. You turn your solar or battery DC line ON and OFF from your phone, and run it automatically on a schedule, countdown or repeating loop.

Can I use this on the AC side of my house wiring?
No. The TOB9DC is a DC-only device (8–90V DC). For AC mains, geysers and house circuits, see our AC smart circuit breaker range instead.

Will it work with my 12V, 24V or 48V battery bank?
Yes. The 8V–90V DC working range covers standard 12V, 24V and 48V battery systems used in Pakistani solar setups.

Does it need internet to work?
The manual button always works, even offline. Remote app control, timers and voice commands need a 2.4GHz WiFi connection.

Can it handle my full solar string current?
It is rated 1A–63A. Confirm your string or battery circuit current stays within 63A. For higher DC currents you would move up to a DC-MCCB class device. Message us and we’ll advise.

Is it safe to install myself?
Because DC circuits carry continuous high current, we recommend a qualified technician. If you’re comfortable with DB and DIN-rail work, follow the polarity and top-input / bottom-output wiring exactly.

What’s in the box and what’s the warranty?
You receive one TOMZN TOB9DC-63WIFI smart DC breaker. It’s covered by a 1-year warranty from Omni Smart with COD available nationwide.