Victron Phoenix Smart IP43 Charger 24/25(1+1) 230V

With boat owners in mind this adaptive 5-step charger can provide either 30A or 50A of charge to each of three battery banks. Or the Phoenix 1+1 model provides 3A to the starter-battery, the rest to the ‘house’ bank. 24V models are available with 16A/25A charge. Bluetooth enabled, you can monitor the charger and set alarms straight from your phone. Adaptive, intelligent, dynamic charge features – see the datasheet on the downloads tab. 

You must purchase the following mains lead to power this unit as it doesn't come with one or a means to wire one in: https://www.bimblesolar.com/victron-charger-mainslead