BOSS – Installation, Operation and Maintenance Manual
A l e n c o n S y s t e m s L L C - P a g e
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BOSS Features
BOSS- Bi-Directional Optimizer for Storage Systems
Alencon’s BOSS is an integral part of multi-rack Electrical Storage System (ESS) that increases
the utilization of the battery, extends battery life and improves safety.
Figure 5: ESS with BOSS
The BOSS is comprised of several DC-to-DC converter units (DCDC) that are connected
between a common DC BUS and each individual battery string (rack). Each DC-DC converter
autonomously controls the charge and discharge current into a battery rack.
Galvanic Isolation
The main safety feature of the BOSS is the galvanic isolation incorporated in each DCDC. Due
to galvanic isolation each battery rack is isolated from the DC BUS, the common earth ground,
and from each other up to 2500 VDC potential. This means that in case of a fault in one rack,
the remainder stays completely isolated from the other racks preventing catastrophic fault
currents.
