ASP 16~20kW

Three Phase Low Voltage

Yes, but the DC side must be engineered for high current. The ASP 16–20kW EU series keeps a 40–60Vdc battery range and lists up to 360A charge/discharge current on the 18kW and 20kW models. That makes cable size, busbars, battery BMS capability, disconnects and overcurrent protection critical. A 48V inverter at this power level is not simply a larger version of a small residential system; the battery connection and thermal design need to be treated as high-current infrastructure.

The larger PV allowance helps the system collect more energy across changing irradiance and support simultaneous loads plus battery charging, while continuous AC output remains limited by the inverter rating. The 20kW model supports up to 30kW PV, and the platform uses a 160–800V MPPT range with a 1000V maximum PV voltage. An off grid solar inverter should still be string-designed from module Voc, current and temperature correction; the 30kW figure is not permission to exceed electrical input limits.

Three-phase sites often have many single-phase branch circuits, so demand can shift heavily toward one phase for short periods. The ASP specification gives the 3 phase inverter additional tolerance when one phase is temporarily more heavily loaded. This can reduce nuisance limitations in mixed-load buildings, but it does not replace proper phase balancing. Continuous branch-circuit design should still distribute loads sensibly, and the total three-phase demand must remain within the inverter’s rated operating limits.

The bypass path allows accepted grid or generator power to feed loads directly when that source is available. SRNE lists a 60A bypass for the ASP 16–20kW platform, while grid/generator input can be higher than the inverter’s own rated output. Bypass current is separate from battery-derived 20kW inverter power, so it should not be added to the inverter rating as if both were continuous conversion capacity. Source breakers, conductors and downstream distribution need to be sized for the current that may pass through.

SRNE lists a no-neutral connection option for supported three-phase systems. This can simplify wiring in installations whose electrical architecture does not require an N conductor, but it should only be used when the connected loads and local wiring rules are compatible with that topology. A three phase solar inverter serving mixed single-phase loads will often need a neutral path. The correct connection method should therefore be selected from the actual load distribution and the manual rather than from a preference to reduce conductors.

Yes, SRNE specifies parallel expansion up to six units, so six 20kW inverters can provide 120kW of rated inverter capacity when configured. The difficult part is not simply multiplying the kW. A large ASP 16–20kW three phase off grid inverter system needs a battery bank capable of very high aggregate current, appropriately divided PV input, synchronized communications, large AC distribution equipment and coordinated protection. If that scale is anticipated, the initial project should be engineered for expansion from the beginning.