*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker
should be X times current of 1 unit. “X” indicates the number of inverters connected in parallel.
Recommended breaker specification of AC input with single phase:
Note1: Also, you can use 50A breaker for only 1 unit, and each inverter has a breaker at its AC input.
Note2: Regarding three phase system, you can use 4 poles breaker, the rating is up to the current of the
phase which has the maximum units. Or you can follow the suggestion of note 1.
Recommended battery capacity
WARNING! Be sure that all inverters will share the same battery bank. Otherwise, the inverters will
transfer to fault mode.
Please follow the above minimum wire size requirement.
One cable is always best, but if there is a problem obtaining for example 100mm²cable, use 2*50mm²or
3*35mm² instead, as long as the square area adds up. Performance of any product can be improved by
thicker cable and shorter runs, so if in doubt round up and keep the length as short as possible.
Battery cables must have crimped (or preferably, soldered and crimped) copper compression lugs unless
aluminum mechanical lugs are used. Soldered connections alone are not acceptable. High quality, UL-listed
battery cables are available .These cables are color-coded with pressure crimped, sealed ring terminals.
Battery terminal must be clean to reduce the resistance between the DC terminal and cable connection. A
buildup of dirt or oxidation may eventually lead to the cable terminal overheating during periods of high
current draw. Use a stiff wire brush and remove all dirt and corrosion from the battery terminals and cables.
Note: for lead acid battery, the recommended charge current is 0.2C(C-battery capacity)
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