PVI 1800/PVI 2500
Installation and Operation Manual
39
Input DC (PV) specifications for PVI 1800/PVI 2500 inverter
PVI 1800
PVI 2500
Input voltage MPP range
125V-350V DC
125V-350V DC
Maximum open circuit voltage
(under all conditions)
400V DC
400V DC
Nominal Input Current
7.3A DC
10.2A DC
Maximum input current
10A DC
14A DC
Maximum PV short-circuit current
15A DC
20A DC
Maximum input power
(inverter limited)
1980 Watt
2750 Watt
Maximum recommended
PV power (modules @ STC)
2200 Watt
3200 Watt
Ground fault detection, interrupt
yes
yes
This maximum recommended power is a nominal figure based on an array with a
relatively optimal tilt angle and orientation (south) as well as other average conditions.
Array over-sizing is used because PV modules rarely run at their STC ratings. However,
if the array is oversized too much clipping of maximum power by the inverter can occur in
optimal conditions. PV module STC conditions are rarely achieved because the cells are
usually at a higher temperature when full 1-sun is available, or when cells are at STC
temperatures, the sun's intensity is often times less than 1-sun. Because STC conditions
are rarely achieved, array over-sizing of 10-20% achieves best overall economic trade-off
with inverter and array costs. The maximum recommended power to be connected to the
inverter is very much dependent on average weather conditions, economic optimization,
tilt and of the array and orientation (for example south, or rotating array). For arrays that
are flat or nearly flat in northern location where the sun's rays are never close to being
perpendicular to the array, the array can be oversized more than these recommendations.
For locations that are hazy or cloudy for most of the year, also more array over -sizing may
be appropriate. For arrays aiming at the sun or rotating arrays that face the sun all the
time, less array over-sizing may be a good choice.
Output to AC grid connection:
The PVI 1800/PVI 2500 is designed to feed power into a standard 60Hz, 240 or 208V AC utility service
or 208V AC provided within a facility by a step down transformer (for example, from 480V AC service).
As required by NEC, there must be a dedicated 2-pole circuit breaker for the PV inverter connection.
This circuit breaker (and wiring) must have a rating of 15A. The inverter is designed to work with the
range of AC voltage for a 240V AC or 208V service defined by UL1741.
