We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular grey charge controller with LCD screen

Grape Solar

Grape Solar PWM Charge Controller 40A 12/24V

SKU CH-3JZ8-2BWY8

A 40 A PWM charge controller for 12 and 24 V off-grid systems with LCD monitoring and remote display up to 40 ft

  • TypeKit Accessories
  • Solar Panel KitsOff-Grid
  • Kit AccessoriesCharge Controller
  • Selling UnitEach
  • Compatible with 12 and 24-Volt battery banks
  • Monitor system performance via integrated LCD display
  • Remote monitoring up to 40 ft within sight of controller
  • Load output enables running DC loads directly
  • PWM charge controller type for off-grid solar kits

Off-Grid 40A PWM Charge Controller

This Grape Solar charge controller manages 12 and 24-volt battery banks in off-grid solar installations. A built-in LCD display provides detailed system monitoring at a glance. The unit also includes a load output for running DC loads directly. Remote monitoring is possible up to 40 feet within sight of the controller.

PWM Regulation Under Sustained Load

Pulse-width modulation regulates the charge current by switching the solar input on and off to maintain battery voltage. During prolonged high-current charging the controller limits output to protect the battery bank. The 40-amp rating applies to the maximum solar array current the unit can handle continuously. Heat builds steadily under full load so adequate ventilation around the unit is necessary.

Installation Notes And Common Issues

Mount the controller vertically on a non-flammable surface with wire access from below. Connect the battery first, then the solar array, then the DC loads to avoid voltage spikes. The LCD menu requires manual selection of 12 or 24-volt mode before use. A frequent error is reversing the solar polarity which can damage the internal circuitry.

Highlights

  • Compatible with 12 and 24-Volt battery banks
  • Monitor system performance via integrated LCD display
  • Remote monitoring up to 40 ft within sight of controller
  • Load output enables running DC loads directly
  • PWM charge controller type for off-grid solar kits

Specifications

BrandGrape Solar
TypeKit Accessories
Solar Panel KitsOff-Grid
Kit AccessoriesCharge Controller
Selling UnitEach

Questions about this item

How much heat does the 40 A PWM controller produce when running all day?

The PWM design dissipates excess voltage as heat, so the 40 A unit will warm noticeably under full load; mount it in a ventilated space away from flammable material.

What battery bank voltage must I already have for this controller to work?

It is compatible with 12 V and 24 V battery banks, so you need one of those two voltages installed before connecting the controller.

Will the load output on this controller run DC devices I already own?

Yes, the load output lets you run DC loads directly through the controller up to its 40 A rating, provided the devices match your 12 V or 24 V bank voltage.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.