Pure Sine Wave Inverter Charger

An inverter charger is three things in one box: an inverter that makes 230V from your battery, a mains charger that recharges the battery from AC power, and a transfer switch that swaps between them on its own. With mains present it runs your loads and charges. When the mains drops out the inverter picks up in about 10 milliseconds, which is fast enough that a computer does not notice. Also they can be used as a UPS, switching over from transfer mode to inverter and battery mode when the mains AC power drops out.

Two kinds here, and the difference is whether solar is built in.

The straight inverter chargers take mains only. They are low frequency transformer units, heavy, and built to start hard loads: 2000W and 3000W at 12V, 5000W and 6000W at 24V, each surging to three times its continuous rating. That surge is why they start a compressor or a bore pump that a lighter inverter will not.

The solar inverter chargers add an MPPT controller, so one box takes panels, battery and mains and decides where the power comes from. 1000W at 12V, 3500W at 24V and 5000W at 48V. This is the usual choice for an off grid house: one unit to wire, one display to read.

The MIDEA HEC2 is a different thing again. A 6kW hybrid with its own 10.2kWh battery built in, running on grid or off grid. That is a whole house system rather than a component.

Pick the battery voltage before the wattage. 3000W at 12V is already about 280 amps of battery cable, 24V halves that and 48V quarters it, which is why everything larger is 24V and 48V. Tell us the loads and we will size it.