Victron Energy BlueSolar MPPT 75/15 Solar Charge Controller.  (Non Bluetooth Version) 

For the bluetooth version please see;
https://www.cmmarine.co.nz/products/victron-smartsolar-mppt-75-15-12-24v-15a

A highly efficient and intelligent solar charge controller designed to charge and maintain 12V or 24V lead-acid or LiFeP04 batteries from 12/24V solar panels. Thanks to its ultra-fast MPPT controller, programmable battery management and innovative tracking algorithms, the charger gets the most out of your solar panels, even during cloudy weather, with charging currents up to 15A. The adaptive 3-stage battery charging includes bulk, absorption and float to charge your battery as quickly as possible and then keep the battery in optimum condition

FEATURES
- Supports Lead-acid and LiFeP04 Batteries
- Ultra-fast MPPT controller
- Fully Programmable Battery Charge Algorithm

SPECIFICATIONS
Battery Voltage: 12/24V (auto-select)
Rated Charge Current: 15A
Nominal PV Power: 220W/12V, 440W/24V
PV Short Circuit Current: 15A max. 
PV Open Circuit Voltage: 75V max.
Peak Efficiency: 98% 
Charge Voltage: 
- Absorption: 14.4V/28.8V (adjustable)
- Float: 13.8V/27.6V (adjustable)
Continuous Load Current: 15A
Low Voltage Load Disconnect: 11.1V/22.2V or 11.8V/23.6V or Battery Life Algorithm
Low Voltage Load Reconnect: 13.1V/26.2V or 14V/28V or Battery Life Algorithm
Screw Terminals: 6mm2 (AWG10)

Dimensions: 100(h) x 113(w) x 40(d)mm

Remotely control and monitor the extensive features of Victron Energy BlueSolar MPPT solar charge controller by attaching a Bluetooth dongle (sold separately) and pairing it with your smartphone or other device via VictronConnect

For Bluetooth Dongle, see: VE.Direct Bluetooth Smart Dongle