MNBE-B, D, D3R, E Instructions
(continued)
Rev: A Page 9 of 10
Battery Configuration:
The MNBE-B is designed for eight batteries. The following diagrams show three different ways
to configure the battery bank. This is not meant to show all methods of inter-connecting the
battery bank. It is the installer’s responsibility to ensure that all wiring conforms to NEC
ANSI/NFPA 70 and all local codes.
This configuration shows a 24 volt hook up using 12 volt group 31 batteries. Notice that in this
configuration there are 4 parallel strings. Parallel strings can be a problem when too many are
involved in cyclic applications such as in an off-grid installation. This set up poses no problems
in a power back up application where batteries are normally floated. In an off-grid home, this
battery bank would not be large enough for acceptable performance. You could add a couple
more battery enclosures side by side, but the quantity of paralleled strings using these 12 volt
batteries would be excessive. It would be advisable to go to 6 volt golf cart sized batteries to cut
the paralleled strings in half.
