User Manual

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885-0001 REV C
Typical operating modes for this conguration: Back-up/Off-grid, Grid Sell, Peak-Load Shaving, Pass Through,
AC Coupled Charging, and Grid Charging.
AES Battery
Mains
Load Panel
Critical AC
Load Panel
Conext
Combox
Xanbus
DC
AC
Grid-Interactive
Inverter
Conext Inverter Conext System
Control Panel
AC Coupled Solar Power
Battery Max Power
Critical Load
5.2.1 Considerations for Sizing of Discover AES Battery Banks in AC Coupled Systems
When retrotting existing AC Coupled solar systems with Schneider Conext inverters and AES batteries the
following sizing guidance should be followed:
If the grid is disconnected: If the grid is disconnected:
A - C = B
Grid-Interactive inverter power – critical load consumption = Power
supplied to the battery based inverter
If C ~ 0 then: If critical load consumption ~ 0:
A = B
Grid-Interactive inverter power = Power supplied to battery based
inverter (limited to maximum battery power)
Therefore: Therefore:
A must be < B
Grid-Interactive inverter power must be < Maximum rated power of the
battery bank (Necessary to not fault battery system)
Guidelines for AC coupled system design:
Battery capacity (energy) should > PV rating (STC)
5.3 Off-Grid with DC Coupled Solar and Generator
This conguration is typically installed when there is no grid present. Normally the goal is to reduce diesel
consumption. Solar and other auxiliary DC Charging sources such as hydro-electric are the primary battery charging
source. A generator is used to charge during dark periods of the day, or when the primary sources are unavailable.
Typical operating modes for this conguration: Back-up/Off-Grid, Gen Charging, and Gen Support.
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Table 8. AC Coupled Solar System Battery Bank Sizing.
Figure 7. Grid-Tie with AC Coupled Solar diagram.