MPPT250HV MPPT Solar Charge Controller, 25 Amps, up to 100 volt open circuit input from solar panels, 12 volts DC out.

MPPT 250 HV and MPPT 250 Maximum Power Point Tracking (MPPT) PV Charge Controllers increase charge current by up to 30%. 15 % current boost is common. Patent pending design squeezes the last amp from your PV array without squeezing your budget. For new installations or upgrading present systems, the MPPT 250 and MPPT250 HV will make the difference. Conventional PWM Charge Controllers waste energy by tying the PV array directly to the battery. 20 to 30 % of your PV power is immediately wasted. The MPPT 250 and MPPT250 HV break the PV direct connection by electronically tracking the PV array Maximum Power Point and converting wasted power into higher charge current. All at about the same cost of conventional Charge Controllers. For maximum efficiency, they should have an input wattage of at least 68 Watts.  They will operate with less input at lowered efficiency. A battery bank with a capacity of at least 100 Amp Hours is recommended.

Description:
The model MPPT250HV is a 25 amp high performance current boosting solar control optimized for use with the Kaneka GSA211 60 watt solar panels. The MPPT250HV allows for input voltage conversion. This increases the Maximum Power Point voltage and allows for higher boost current over wider operating conditions. You can charge a 12 volt battery from a high voltage solar panel. A high accuracy digital volt and amp meter displays battery voltage and charge current. An auxiliary 100 ma 13.8 volt trickle charger is provided to keep the engine/generator start battery fully charged. A 15 amp capacity low voltage disconnect protects the battery from over discharge conditions. Proper battery charging is maintained over a wide temperature range with the battery temperature sensor. Battery float voltage is accurately regulated. Night time battery discharge is eliminated through the use of a high efficiency Schottky diode. Maximum normalized input power to the MPPT250HV is 250 watts.

Operation:
When power is available from the solar panel, the microprocessor measures and determines the optimum operating point of the solar panel to produce the highest charge current possible to the battery. There is no interaction between the MPPT 250 or MPPT250 HV and other battery charging systems. The float voltage is factory set to 14.1 volts. The float voltage is adjustable. When the battery voltage reaches the float voltage the red Float LED turns on. At this point, charge current to the battery will gradually diminish to maintain the float voltage. As soon as a load is turned on, maximum charge current is applied to the battery. Temperature compensation adjusts the float voltage to properly charge the battery over a wide temperature range. When the battery is warm the float voltage will drop and when the battery is cold the float voltage will rise. They are well suited for flooded, deep cycle and gel type batteries. A low voltage disconnect is included to protect the battery from excessive discharge by automatically turning off a load, such as lights that may have been left on. Load is disconnected when the battery voltage is 12.0 volts or lower. When the batteries are recharged to 12.6 volts the low voltage disconnect reconnects the load. The yellow LED on the face of the MPPT250HV is lit when the load is connected. Operation of the low voltage disconnect is fully automatic. Maximum low voltage disconnect load current is 15 amps. Do not connect the low voltage disconnect to inverters.

Note: The MPPT 250 and MPPT250 HV do not come with a mounting box since they were designed for the RV market. They fit the Specialty Concepts footprint exactly and are a much better controller. The MPPT 500 and MPPT 500 HV do come with a mounting box.

Note: All BZ products come with a limited five year warranty.

Note: For optimal Maximum Power Point Tracking performance, it is recommended that MPPT charge controllers be used in conjunction with uniform solar arrays consisting of multiple, identical solar panels. MPPT charge controllers will still work with mixed arrays, but at reduced efficiencies, which defeats the whole point of MPPT technology. These devices were designed to calculate the most efficient charging characteristics given the assumption of a uniform array. Mixed arrays, by definition throw this calculation off.