CBE PRS300 Solar Charge Controller 12V 17A 300W Two PV Inputs for RVs Cabins Boats Compact Efficient

Solar Charge Controller - 17A 300W 12V - for Maximum Output Built by CBE and distributed by RVM, the PRS300 regulator is purpose‑built to squeeze the best performance from 12V photovoltaic arrays up to 300W. Its compact size (115 x 90 x 37 mm) makes it a practical fit for off‑grid cabins, RVs, boats, or any 12V solar setup where reliable charge control matters.

Why the PRS300 stands out

• Optimized for 12V PV modules up to 300W with two PV connections, letting you combine panels to reach your system’s needed power without overstressing the regulator.
• Three charging curves (A, B, C) to match different battery chemistries or preferences, with precise end‑of‑charge voltages of 14.1V (A), 14.3V (B), and 14.7V (C) and corresponding float voltages of 13.5V (A), 13.8V (B), and 13.5V (C). This enables tailored charging for lead‑acid, lead‑gel, and AGM batteries.
• Battery desulphation functionality automatically engages when the battery needs it, promoting longer life and better performance in deep‑cycle applications.
• LED status indicators provide at‑a‑glance insight: battery charging at maximum current until end charge, charge maintenance at a constant voltage, a wrong connection alarm, and regulator ON/OFF status (solar absent turns the regulator off automatically).
• Smart protection includes electronic reverse current blocking and reverse polarity protection, helping protect both panels and batteries in challenging environments.
• Automatic sunlight‑aware shutdown ensures no unnecessary draw when panels aren’t producing power, extending battery life and reducing wasted energy.

What it delivers in real‑world use

The PRS300 is a practical, no‑nonsense regulator for 12V systems that prioritize reliability and battery longevity. It’s ideal for:

• Rugged RV and marine installations where space is at a premium and a small, efficient regulator is essential.
• Off‑grid cabins or sheds powered by modest solar arrays who need safe charging, battery maintenance, and protection against miswiring or inadvertent shorts.
• DIY solar projects that require a trusted regulator capable of handling up to 300W with user‑selectable charge profiles.

How it works and practical tips

Connect up to two PV modules to the regulator to reach a combined input up to 300W. Choose the end‑of‑charge setting that best matches your battery chemistry, monitor the four LED indicators to verify charging status, and rely on the desulphation feature to keep stubborn batteries healthy over time. For testing and diagnostic purposes, you can pair the PRS300 with the PT642 test panel to verify charging current and battery voltage, ensuring your system is tuned for peak performance.

Technical snapshot

• 12V
• 300W total, 2 module connections
• 14.1V (A) / 14.3V (B) / 14.7V (C)
• 13.5V (A) / 13.8V (B) / 13.5V (C)
• 3
• Lead‑acid, lead‑gel, AGM
• Electronic reverse current blocking; reverse polarity protection
• Yes, automatic when needed
• 4 LEDs for Battery charging, Float/On, and alarms
• 115 x 90 x 37 mm
• PT642 compatibility

Note: This item is shipped directly from our local suppliers to ensure prompt delivery and availability. Product code RVL750J – 05.07.22.