10A PWM solar controller
PrIce: £23 This is a simple controller that governs the maximum voltage going into the battery, but does not have the efficiency of the PMMT unit. It does have many features, however, including protection against reverse polarity, overcharge, deep discharge and overnight drain back from battery to panel. It does not have a display, but can be connected to an MT50 remote screen, or via a Wi-Fi module to your phone, or an RJ45 to USB cable to your laptop, allowing you to monitor and alter a whole range of parameters, including battery type and cumulative charge and discharge totals. It works on 12V or 24V.