Thank you for asking this question. I will give you three reasons why REhub 12/24V 40A solar charge controller is a better Solar Charge controller than any other charger in the market
 Battery Net Current Monitoring and Control : REhub has an extra battery Terminal : to which the Inverter’s Battery -Ve cable is also connected. This port monitors the net current delivered to the batteries – and therefore the Loads ( through the Inverter) can get as much current as possible from the Batteries and Solar Yet the Net Positive current delivered to the batteries is limited to what is safe for the batteries. To give you an example, let us say that you have 150AH batteries. If you carefully read the battery manual, you will notice that the battery manufacturer recommends a maximum of 10% to 15% of the battery AH as the Charge rate to the batteries. However , you may require Solar Panels that can deliver say 40A current to meet your load requirements. If the Load is not there and Battery is in Bulk charge mode, with other chargers, all the available current just flows into the battery. This does not charge the battery faster ( If this were possible, we will all be driving E-Vehicles with Lead acid batteries by now). Only the Battery reaches its gassing Voltage, heats up, loses Electrolyte etc. In REhub however because of the Battery net current monitoring and control, the net positive current delivered is controlled to what is safe for the batteries. So you get real back up and utilization of the installed Solar energy.
 90V ( Updated : Latest models now support 110V) Open circuit for even 12V Battery system Voltage. With 90V Open circuit support, you can connect 2 X 72 Cell panels ( Say 2 numbers of 300Wp) in series to the 12V battery. This results in power coming into the unit at higher Voltage and Lower Current. Lower current means lesser I2R losses. Also higher Voltage provides more headroom for charging even under cloudy conditions. 72 Cell panels ( called 24V panels in Market parlance) cost significantly lesser per Wp compared to 12V panels. You save on system cost and get better output with REhub.
 Our 40A rating is CONTINUOUS rated. Which means depending on your Load distribution through the day, you could be connecting more panels , whose Peak output can exceed 40A , yet REhub will safely limit the output to 40A and run with output of 40A through the day if required.
Beyond this : The product is COMPLETELY designed, manufactured in INDIA with cutting edge Power electronics that deliver higher efficiency in a smaller package ( Higher Power density)