Go Power! 25 Amp Digital Solar Regulator is one of the most popular solar regulators in the RV market. This regulator is used to ensure that the batteries will not be overcharged by the solar system and has a 5 year warranty as well as a very robust shunt style regulator. This regulator is capable of handling up to 395-Watt of solar and has a digital display that will show Voltage as well as the amperage going into the batteries at a given time. All instructions are provided.