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Wiring Multiple Batteries

NOTE

  • The Sol-Ark 15K-2P-N hybrid inverter requires two positive and two negative 2/0 AWG cables, as specified in the Sol-Ark documentation.

    • The HELIOS ESS Battery to Inverter Power Cables (950-0070), with two sets of positive and negative 2/0 AWG cables, satisfy Sol-Ark’s requirement for the battery to inverter cables.

  • Paralleling batteries with the conduit box requires the HELIOS ESS Parallel Wire Kit (950-0068), which includes a pair of 2/0 AWG battery cables (positive and negative) and one CAT6 or higher cable.

    • One parallel wire kit is required to parallel two batteries. Two kits are required to parallel three batteries, which is the maximum number of HELIOS ESS batteries you can connect in parallel with conduit boxes.

NOTE

In a multiple battery installation with the conduit box, depending on the requirements in your area, you may have to connect conduit between each conduit box for the battery cables (required in the US and in Canada).

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Conduit in Two and Three-Battery Systems

  1. On the battery, unscrew the battery terminal cover plates to access the positive battery terminals.

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Remove Battery Terminal Cover Plate

  1. Pass the two positive battery cables in the HELIOS ESS Battery to Inverter Power Cable set (950-0070), from the inverter, through the conduit box, and out the conduit to the sides of the conduit box, as required.

  2. Connect one of these positive battery cables to a battery on one end of the battery bank, and connect the other positive battery cable to the battery on the other end of the battery bank. Push the cable connectors against the receiving pins of the batteries to secure the connections.

  3. Connect the lugs of these positive battery cables to the inverter’s positive battery ports.

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Positive Battery Cables to Batteries at Opposite Ends

  1. Repeat steps 1 to 4 to connect the negative battery cables (950-0070) to the negative battery ports on the inverter and to the negative terminals on the batteries at opposite ends of the battery bank. Push the cable connectors against the receiving pins of the batteries to secure the connections.

  2. Connect the lugs of these negative battery cables to the inverter’s negative battery ports.

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Negative Battery Cables to Batteries at Opposite Ends

  1. Connect the positive battery cable in the HELIOS ESS Parallel Wire Kit (950-0068) to the receiving pins of the positive battery terminals as shown in the following diagrams. Similarly, connect the negative battery cable to the receiving pins of the negative battery terminals as shown in the following diagrams. Push the cable connectors against the receiving pins of the batteries to secure the connections.

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Parallel Battery Cables: Positive to Positive, Negative to Negative

  1. After all the battery cables are connected, connect the CAN communication cables. (See the next section.)

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