AMPS Technology
- AMPS inverter modules deploy Twin Sine Inverter (TSI) technology
- Each inverter module has a DC input as well as AC input
- When AC power is available, i.e. 99.9% of the time on North American grid, inverters draw power from AC grid but output fully conditioned AC power
- Input voltage: +15% to -20% (97-138VAC on120VAC)
- Output voltage regulation: +/- 2%
- When AC power is not available, or outside the acceptable voltage range, (i.e. outside of +15%/ -20%), inverters draw DC power automatically, but there is NO transfer time since inverters have DC input all the time
Highly Reliable Technology
With TSI technology, each inverter module acts like an individual UPS and can separate itself from the system, in case of failure. Hence, TSI eliminates the need for Static Transfer Switch (STS), which, in traditional double-conversion systems, is often the single point of failure. Moreover, there is no transfer time when the module switches from AC to DC mode.
AMPS Inverter Topology
Though each inverter module has DC input all the time, it only draws from batteries when needed. The ‘intelligence,’ i.e. when & how much to draw from DC, is managed by a high voltage DC bus inside each inverter module.
High Efficiency Technology
- AMPS offers up to 94% inverter efficiency - highest among traditional double conversion -48VDC systems which typically deliver ~85% efficiency
- High efficiency possible due to AC to AC conversion
- However, BIG difference between AMPS system and other inverters in AC mode - even in AC-to-AC conversion, AMPS inverters deliver fully conditioned, line-regulated AC power!
- AC to AC conversion mode with line conditioning is called Enhanced Power Conversion (EPC) mode
- In EPC mode, AMPS inverter modules deliver up to 94% efficiency; only limitation is no galvanic isolation
