The VRC-200 charge reference controller is the successor of the VRC-100 manufactured between 2015 and 2018. It was specifically designed to control unmodified, stock alternators equipped with an external voltage sensing input to provide fully configurable 3-stage charge control with advanced capabilities. The controller is able to both reduce or increase the built-in regulation voltage of the alternator and implement a fast, efficient charge profile while reducing stress on the batteries.
There is no need to dismantle the alternator, remove its regulator or worry about regulator polarity issues. A wire from the controller simply connects to the voltage sensing terminal on back of the alternator.
Originally developed for charging lithium iron phosphate (LiFePO4, also sometimes referred to as LFP) batteries on boards marine vessels with externally-sensed alternators, the VRC-200 controller is equally suitable for charging all types of 12V and 24V lead-acid batteries: flooded, SLA, AGM or gel. It also brings additional functionality for integration with lithium battery management systems.
With its unique current sensing capability, it is the smartest alternator controller on the market:
- Active Current Limiting allows keeping the charge current within the alternator continuous output capability without overheating for reliability and long service life. It also means higher sustained output at low RPM than what is experienced with traditional controllers that blindly reduce the field current.
- Smart Charge Termination makes use of the battery current information to determine when the charge is complete. This means an optimum absorption duration every time, without any overcharging when batteries are already full.
Battery temperature compensation is available for charging lead-acid cells optimally by using an optional temperature sensor.
The controller is microprocessor-controlled and was engineered to provide industrial-grade robustness and ultra-low power consumption in standby mode.
For the owners of Volvo Penta D-Series engines, it is a highly effective plug-in upgrade for improving the charging characteristics of the excellent stock 14V/115A Mitsubishi A003TR0091ZT and A003TR0093ZT alternators. The VRC-200 is also directly compatible with the Valeo alternators of many older Volvo MD-Series engines.
In doubt, please get in touch first to discuss your application before ordering. The VRC-200 controller is not a replacement for Balmar, Sterling, Mastervolt and other external regulators. It works with the built-in regulator of the alternator, without modifications.
The VRC-200 controller can be integrated to build cost-effective very high performance and high reliability charging solutions using high-output alternators such as the Delco SI-Series featuring Remote Sense, as well as the Bosch LHX and the high-efficiency Eco-Tech models. Many Japanese automotive alternators also feature a “S” terminal for battery voltage sensing and are directly compatible as a result.
Download Product Manual (Current model, Hardware Rev 5+)
Product Manual for 2019 model, Hardware Rev 4 (this model has terminal #1 at the bottom)