EV Charger support

Discussed in https://github.com/WillCodeForCats/solaredge-modbus-multi/discussions/564

^{Originally posted by mikedeluca March 27, 2024}
So I was digging around to try to figure out why some sites batteries work and at others they don't show up and I ran across a Modbus address that wasn't one of the 3 inverters.

{'c_id': 'SunS', 'c_did': 1, 'c_length': 65, 'c_manufacturer': 'SolarEdge', 'c_model': 'SE-EV-SA-US-40P', 'c_version': '0004.0019.0036', 'c_serialnumber': '63002925', 'c_deviceaddress': 4, 'c_sunspec_did': 103, 'c_sunspec_length': 50, 'current': 0, 'l1_current': 0, 'l2_current': 0, 'l3_current': 0, 'current_scale': -32768, 'l1_voltage': 0, 'l2_voltage': 0, 'l3_voltage': 0, 'l1n_voltage': 0, 'l2n_voltage': 0, 'l3n_voltage': 0, 'voltage_scale': -32768, 'power_ac': -32768, 'power_ac_scale': -32768, 'frequency': 0, 'frequency_scale': -32768, 'power_apparent': -32768, 'power_apparent_scale': -32768, 'power_reactive': -32768, 'power_reactive_scale': -32768, 'power_factor': -32768, 'power_factor_scale': -32768, 'energy_total': 0, 'energy_total_scale': -32768, 'current_dc': 0, 'current_dc_scale': -32768, 'voltage_dc': 0, 'voltage_dc_scale': -32768, 'power_dc': -32768, 'power_dc_scale': -32768, 'temperature': -32768, 'temperature_scale': -32768, 'status': 1, 'vendor_status': 0, 'rrcr_state': 0, 'active_power_limit': 100, 'cosphi': 0, 'commit_power_control_settings': 0, 'restore_power_control_default_settings': 0, 'reactive_power_config': 0, 'reactive_power_response_time': 0, 'advanced_power_control_enable': 0, 'export_control_mode': 0, 'export_control_limit_mode': 0, 'export_control_site_limit': 0}

This is ID 4 on the Modbus TCP. The model and serial match my Solaredge EV Charger. Feels like this would be interesting functionality to add... I'll try to do some more scanning of registers