Inverter RS Smart Solar 2. General Description The Inverter RS Smart Solar is a combined inverter and MPPT solar charger. It is designed to operate with a 48V battery bank, a PV input voltage range of between 65-450V and produces a pure AC sine wave at 230V. 2.1. High efficiency Outstanding inverter/charger efficiency - Maximum efficiency of 96%. The inverter is short circuit proof and protected against overheating, whether due to overload or high ambient temperature.
Ultra-fast Maximum Power Point Tracking (MPPT) - Especially in case of a clouded sky, when light intensity is changing continuously, a fast MPPT algorithm will improve energy harvest by up to 30% compared to PWM charge controllers and by up to 10% compared to slower MPPT controllers. Advanced Maximum Power Point Detection in case of partial shading conditions - If partial shading occurs, two or more maximum power points may be present on the power-voltage curve. Conventional MPPTs tend to lock to a local MPP, which may not be the optimum MPP. The innovative SmartSolar algorithm will always maximize energy harvest by locking to the optimum MPP. 2.2.
Frequency shift function This section's information does not apply when the AC input is connected and functioning properly, or when ESS is operating normally. Frequency shifting is not possible with the AC input connected. Frequency shifting is possible only when the AC input of the Inverter RS Smart Solar is disconnected. When external PV inverters are connected to the output of the inverter, excess solar energy is used to recharge the batteries, just as with the internal MPPT solar controller. Once the battery absorption voltage is reached, charge current will reduce by shifting the output frequency higher.
This frequency shift is automatic and does not require configuration on the Inverter RS Smart Solar, though the AC PV inverter may require additional configuration. This feature is used for battery over charge protection and solar assist. The Inverter RS Smart Solar does not allow complete charging of the battery from an AC PV inverter to fully 100% State of Charge. That is a safety precaution to prevent overcharging of the battery when the AC PV output cannot be adjusted quickly enough to prevent a system shutdown, so when charging from AC PV, there is some capacity left in the battery remaining to absorb this surplus.
To complete a full charge from solar, connect PV to the internal MPPT solar charger, or another DC MPPT. 2.3. High power inverter High peak power - The inverter is able to supply a maximum AC output power to a peak 9000W or 50A AC, for 3 seconds. This supports smooth operation for motor start up and other demanding surge loads. Continuous power output, with solar boost - Continuous output power at 25C t ambient, at 52VDC, is 5300W. When combined with solar power from the built-in MPPT this increases approximately 10% to 5800W. Isolated PV connections for additional safety - Full galvanic isolation between PV and battery connections provide additional overall system safety.
Temperature Protected - Over-temperature protection and power derating when temperature is high. Page 3 General Description