Tripp Lite 5kVA Owner's Manual page 8

Features (Rear Panel)
10kVA Power Module
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10kVA Transformer Module
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10kVA Battery Module
* Expandable Battery Module (Tripp Lite model #
BP240V10RT-3U) shown. Depending on the model ordered,
the 10kVA Power Module may have been shipped with an
expandable Battery Module (like the one shown above) or
one which is not expandable. All 10kVA Power Modules,
however, are fully compatible with BP240V10RT-3U Battery
Modules (sold separately) if extended runtime is required.
see page 9 for feature descriptions
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