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Eight small green circuit boards with digital displays and relay modules

WISDUM

WISDUM 12V-36V DC Low Voltage Protector Pack of 8

SKU CH-9DPX-PWVXP

Protects 12-36 V DC batteries from over-discharge with a digital cut-off relay, adjustable thresholds and factory-reset function, supplied in a pack of eight

  • Prevents battery over-discharge with automatic cut-off at preset voltage
  • Compatible with lead-acid, lithium-ion and solar panel batteries
  • Digital display shows voltage with ±0.1V accuracy
  • Factory reset by holding both buttons on power-up showing 888
  • Compact board measures 57 x 42 x 19 mm

WISDUM Low Voltage Protector Pack

This pack supplies eight identical DC protection modules designed for 12 V to 36 V battery systems. Each unit monitors voltage and uses a built-in relay to disconnect the load when a user-defined threshold is reached. The modules suit lead-acid, lithium-ion and solar-panel batteries but are not intended for battery packs. They are aimed at hobbyists and technicians who need repeatable over-discharge protection across multiple circuits.

Build Integration and Wiring

Each board measures 57 x 42 x 19 mm and draws minimal power while monitoring. The relay acts only as a switch and does not change the voltage passing through it. Users must provide a suitable enclosure, wiring and a separate power cut-off switch because the relay itself does not isolate the supply after disconnection. Settings are retained through power loss, so the module resumes operation without reconfiguration.

Capacity Limits and Headroom

The relay is rated for a maximum of 10 A below 12 V and must stay under 8 A above 12 V to avoid contact damage. Voltage measurement accuracy is ±0.1 V and the default disconnect point is 12 V with a 2 V hysteresis. Factory reset is performed by holding both buttons while powering on until the display shows 888. The module cannot protect against over-current or short-circuit conditions.

Highlights

  • Prevents battery over-discharge with automatic cut-off at preset voltage
  • Compatible with lead-acid, lithium-ion and solar panel batteries
  • Digital display shows voltage with ±0.1V accuracy
  • Factory reset by holding both buttons on power-up showing 888
  • Compact board measures 57 x 42 x 19 mm

Specifications

No published specifications for this item yet.

Questions about this item

At what current does the relay contact become the limiting factor during continuous operation?

The relay is rated for up to 10 A below 12 V and must stay under 8 A above 12 V; sustained loads beyond those levels will damage the contacts.

How much power does the module itself draw while it is protecting the circuit all day?

The board consumes 0.1 W in standby, adding negligible heat to a sealed enclosure during 24-hour use.

What minimum wiring and battery type must already be in place for one of these protectors to function?

You need a DC source between 12 V and 36 V — lead-acid, lithium-ion or solar-panel battery — and conductors sized for at least 8 A continuous current.

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