Freedom Lite Marine Installation Manual Revision 1
P a g e
22 | 26
3
The main breaker switch keeps
tripping each time I attempt to
switch it on
There are several potential causes:
1.
The Battery Management System has not been
switched on. The ON button must be pressed for
5 seconds. On release the SoC Display must
remain illuminated.
2.
High inrush current on certain inverters – First
preference is to pre charge the DC bus by
switching on the solar charge controllers if
present and in daytime. If this is not possible
switch on the AC feed into the inverter and
switch on the inverter. Some will then pre
charge the DC bus. If this is also not possible (at
night, off grid with no generator), try to close
the breaker twice in quick succession – the
second attempt must be within a second, before
the inverter capacitors discharge again. This
reduces the inrush current on the second closing
attempt. If this does not work after the second
attempt investigate the other options. Note that
closing a breaker onto a DC bus without pre
charging is not recommended.
3.
Short circuit on the DC Bus or faulty inverter or
MPPT causing high currents
4.
In a system with multiple Lites in parallel the
reason could be that the battery you are trying
to switch on is at a vastly different voltage to the
others – the voltages must be similar (within 2V
of each other) on all batteries when switching
them onto a common DC bus.
If none of the above solves the problem you will need to
contact Freedom Won or your authorised installer for
assistance with this issue.
It will be necessary to establish the reason for the error
before continuing with normal operation of the system.
Repeated tripping and resetting is potentially damaging
for the breaker.
4
After resetting the BMS the main
breaker still will not stay up.
First check whether the battery SOC is at 100% or below
10% by holding in the ON button and observing the SOC
display.
If the SOC is at or below 10% the tripping is most likely
because the battery is fully discharged and the BMS is
protecting the cells from further discharge. Ensure that
there is no chance of load being applied to the battery
by isolating the AC output from the inverter. Ensure that
the AC input to the inverter is live so that the charger
may begin charging the battery after you switch it on.
Alternatively an MPPT can be used for this immediate
charge if there is sunshine at the time. An alternator
