Detailed Description - Studer Solsafe concept Application Note

Detailed description

The Solsafe concept
The Solsafe concept is a backup system for grid
connected solar installations.
This solution enables to secure totally or
partially the power supply in case of a power
cut, and to keep on using the solar energy being
produced.
Note that all inverter-chargers of Studer Innotec
are bi-directional. This allows integrating any of
them into the Solsafe concept.
Figure 3, Solsafe concept
Compared to other similar solutions, the Solsafe
concept offers the following advantages :
 It allows a great flexibility by choosing
independently the
(matching the solar generator) and the
stand-alone power (matching the peak
consumption of the user).
 The grid-feeding inverter can be chosen with
high voltage input range (lowering wiring
costs).
 The wiring can be optimized by placing the
grid-feeding inverter near the solar field
 It allows a possible upgrade of existing grid-
connected installations.
 The inverter-charger allows a fast charge
from the grid (important in case of frequent
power cuts hindering a complete charge of
the battery).
 The power available in case of islanding is
added (inverter-charger Pnom + grid-feeding
instantaneous power).
 Its allows an upgrade of existing stand-alone
installations that are connected to the grid
afterwards (adding value to the investment)
 It standardizes the amount of products to
maintain and makes the staff training easier
(this concept can be implemented with all our
combis, XTH, XTM, XPC, Compact and
HPC).
 It allows to work with standard grid-feeding
inverters (SolarMax, Fronius, ...).
 It ensures that no grid-feeding from the
battery is possible.
grid-feeding power
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Application Note 003
The Solsafe system can be fully wired by the
installer. In that case, Studer is only supplying
the inverter-charger (Xtender
series) and the ARM-01 Module (for Compact
series only).
The wiring schematics for the Solsafe system
and Solsafe three phase system are at disposal
in the appendices (available at the end of this
document).
Solsafe S-Box
For the Solsafe system a cabling
solution exists, the S-Box.
The S-Box offers :
 Hassle free cabling
 Quick installation
 Easy commissioning
The S-Box can be supplied in 4
versions :
 S-Box 25A for Compact Series (S-Box-25C)
 S-Box 25A for Xtender Series (S-Box-25X)
 S-Box 25A with ENS Module for Compact
Series (S-Box-25C-E)
 S-Box 25A with ENS Module for Xtender
Series (S-Box-25X-E)
or Compact
Figure 2, S-Box