Main Diagram
LITHIONICS BATTERY, CLEARWATER, FL 33765 USA | PH: 727.726.4204 | FAX: 727.797.8046 | WEB: LITHIONICSBATTERY.com 4
The main diagram depicts the general layout of the system. The 2/0 AWG battery positive cable is connected to the main positive distribution bus via a 300A
post-mounted fuse and an isolation switch.
The inverter is connected to the positive distribution bus via a 250A class T fuse and an isolation switch. The class T fuse block should be mounted as close
as possible to the positive distribution bus. The inverter switch is required for inverter isolation and inrush management when first turning on the system. The
chassis DC grounding cable (green) should be sized not less than one size smaller than the DC positive conductor and have a capacity such that the DC
positive fuse has an amperage rating not greater than 135% of the current rating of this ground wire.
If the positive cable supplying the inverter shorts to ground internally, then the chassis ground cable needs to be able to carry enough current to blow the
inverter fuse without melting and possibly causing a fire
The Lithionics IonGage monitors battery voltage, current, power, amp-hours consumed and state of charge.
The Victron Smart MPPT charger is connected to the positive distribution bus via a 40A Maxi fuse. The PV solar array is connected to the MPPT charger
via a circuit breaker. The specified circuit breaker is only rated at 48VDC; if your PV solar array has an open circuit voltage that is higher, then another circuit
breaker with a higher voltage rating must be substituted.
The Sterling Battery to Battery charger is connected to the positive distribution bus via a 50A Maxi fuse (80A for the Sterling BB1260 charger). It also has
a fuse at the starter battery; this fuse must be installed as close to the battery as possible.
Wiring note:
A total DC power circuit resistance between a single Lithionics battery and a 3000W inverter can be as low as 5 mOhm (0.005 Ohm), when using short wires
to connect the battery to the inverter. With a typical battery voltage of 13.5V, this can result in an inrush peak current of 2,700 Amps (!!!) from the battery to
the inverter capacitors. This surge only lasts around 1 millisecond but could be enough to damage the Battery Management System (BMS) or even damage
the inverter. The minimum required wire size and length stated in the wiring diagram are provided to ensure minimum circuit resistance of at least 5.6 mOhm
to reduce the inrush under 2,400A. For more information refer to Lithionics Support page, FAQ Section at this link https://lithionicsbattery.com/support/
