CBE PT642 12V Digital Test Panel image 1 CBE PT642 12V Digital Test Panel image 2
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CBE PT642 12V Digital Test Panel

£91.99(inc VAT) £119.99
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  Product Description
The CBE PT642 12V Digital Test Panel provides accurate real-time monitoring of your leisure battery voltage and solar panel charging performance when connected to the PRS300 solar charge controller. This compact 60 x 60mm touchscreen display lets you check exactly how many amps your photovoltaic modules are delivering to your battery at any given moment, plus the current battery voltage reading. Rather than guessing whether your solar setup is working properly, you get precise numerical data that helps you understand your power generation and consumption patterns whilst touring or off-grid camping.

Installation is straightforward thanks to the included 1.5m connection cable and wall-mounting spacer, though you'll need the specific CBE PRS300 solar regulator for this panel to function. It won't work with other brands or models of charge controller. The anthracite grey finish matches the popular Berker modular socket and switch ranges commonly fitted in European caravans and motorhomes, and the panel slots neatly into a standard Berker frame for a professional-looking installation. The touch-sensitive interface means there are no physical buttons to fail or get dirty over time.

One limitation worth noting is the exclusive compatibility with the PRS300 controller, which restricts your options if you're running a different solar charging setup or want to upgrade to an MPPT controller later. The PRS300 itself is a PWM regulator designed for 12V solar panels up to 300W maximum, and it can handle lead-acid, gel, and AGM battery types through selectable charge profiles. For those with the right equipment combination, this panel delivers clear visibility of solar system performance without needing to access the controller itself, which is often tucked away in a locker or under seating.

* Image 2 is for identification purposes only.

CBE PT642 12V Digital Test Panel Features


  • Digital touch display shows battery voltage and solar charging current
  • 1.5m connection cable with wall mounting spacer included
  • Real-time monitoring of photovoltaic panel performance
  • Exclusive compatibility with CBE PRS300 solar charge controller

Specifications
  • Cable Length : 1.5 metres connection cable supplied
  • Dimensions : 60 x 60 millimetres (width x height)
  • Colour : Anthracite grey finish
  • Compatibility : PRS300 solar charge controller only
  • Voltage Range : 12V DC leisure battery systems


Key Features


Digital Touch Display
Touch-sensitive screen eliminates physical buttons, shows voltage and current numerically.

1.5m Connection Cable
Pre-fitted cable reaches from controller to display location, includes mounting hardware.

60 x 60mm Size
Compact footprint fits standard Berker frames, matches caravan electrical accessories.

Real-Time Monitoring
Instant updates on solar panel output and battery condition during charging cycles.

PRS300 Compatibility
Designed specifically for PRS300 PWM controller, up to 300W solar panel systems.

Frequently Asked Questions

Will the CBE PT642 work with solar charge controllers other than the PRS300?
No, the PT642 is designed exclusively for the CBE PRS300 solar charge controller and will not function with other brands or models including newer CBE MPPT controllers like the PRM350 or PRM400. The communication protocol between the panel and controller is proprietary to this specific pairing. If you have a different solar regulator, you will need to source a compatible display unit designed for that particular controller model.
What information does the PT642 display panel actually show?
The PT642 displays two key measurements: your leisure battery voltage in volts (V) and the current being supplied by your solar panels in amps (A). This real-time data helps you monitor whether your photovoltaic modules are generating power and how much charge is flowing into your battery. The digital readout provides numerical values rather than vague LED indicators, giving you precise information about your solar charging system performance.
Can I install the PT642 panel remotely from where the PRS300 controller is located?
Yes, the included 1.5 metre connection cable allows you to mount the display panel away from the controller location, which is particularly useful because solar charge controllers are often installed in hard-to-access areas like under seats or in external lockers. The 1.5m cable length typically provides enough reach to position the display panel somewhere convenient in your living space for easy monitoring whilst relaxing or cooking.
Does the PT642 fit standard caravan electrical accessories and frames?
The PT642 measures 60 x 60mm and is designed to fit Berker modular frames and modular plate systems commonly used in European caravans and motorhomes. The Berker range is a standard modular electrical system you will find in many leisure vehicles, particularly those built for the continental market. The anthracite grey colour matches the popular Berker socket and switch finishes. You may need to purchase a suitable Berker frame separately if you do not already have one fitted.
Why is monitoring solar charging current and battery voltage important in a caravan?
Monitoring allows you to see whether your solar panels are actually working and how much power they are contributing to your battery. A fully charged 12V leisure battery should read around 12.7 volts or higher when rested. Readings below 12.4 volts indicate the battery is significantly discharged. Seeing the charging current in amps tells you how hard your solar panels are working at any moment, which varies with sunlight conditions, panel angle, and shading. This information helps you manage your power consumption and avoid running your battery too low, which shortens its lifespan.
What is the difference between PWM and MPPT solar controllers and does it affect the PT642?
The PRS300 is a PWM (Pulse Width Modulation) controller, which is a simpler and less expensive technology than MPPT (Maximum Power Point Tracking). PWM controllers work well with solar panels that match your battery voltage, whilst MPPT controllers can extract more power from panels with higher voltages. The PT642 only works with the PRS300 PWM model and will not function with CBE's newer MPPT controllers such as the PRM350 or PRM400, which require the PT742 display panel instead.
How do I know if my solar panels are working properly using the PT642?
On a sunny day, you should see a current reading (amperage) displayed on the PT642 indicating power is flowing from your solar panels to the battery. The actual amperage will depend on your panel wattage, the intensity of sunlight, and whether your battery needs charging. If the panel shows zero amps during bright sunshine and your battery is not fully charged, this suggests a problem with your solar panels, wiring, or controller. Voltage readings will show whether your battery is accepting charge, typically rising from around 12.4 volts (discharged) towards 13.5-14.4 volts during active charging.
What battery types work with the PRS300 controller that the PT642 monitors?
The PRS300 solar charge controller can charge lead-acid (wet cell), gel, and AGM (Absorbed Glass Mat) 12V leisure batteries. You select the appropriate charging profile using a switch located inside the controller housing itself. Different battery chemistries require different charging voltages to achieve full charge without damage, which is why this selection is important. The PT642 display will show the voltage and current regardless of which battery type you have selected on the controller.
EAN-13 : 8033123264754
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
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