BlackMax – Installation and Operation Manual
Page 28 of 36
Issue date: 24/11/2023. Version 13.0
FAQs and Trouble shooting
1.
“I lost power!” What should I do?
R: The most likely reason for this is that the battery has reached the low SOC limit and has stopped inverting (producing 240V
power). In this situation, turn the system off, start the generator, turn your BlackMax on again as recommended in the
“Shutdown and Start-up” procedure in this manual. HOWEVER, be sure to leave the Power OUT breaker turned off. This will
allow all the power generated to go directly to the battery and not to the load. Let the batteries charge for 15 minutes and then
turn on the main breaker.
NOTE:
You can turn the main breaker on again but be careful not to use more than is being produced. This will lead to draining
the batteries even more and possibly damaging them.
If you do not have a generator, then wait until there is PV power available. The inverter will automatically recharge the battery
and turn back on once the battery is at a safe level.
2.
What happens if my Troppo batteries go completely flat, with no lights on the battery itself?
R: This will happen if the BlackMax is re-started and the battery not immediately charged. Contact RedEarth’s technical support
on 1800 733 637.
NOTE:
This system will still work in Emergency Power Mode – meaning that limited power will be available when the solar panel
are in sunlight.
3.
My Generator is not charging the batteries. What does this mean?
R: The first and most obvious thing to check in this situation is that the Power IN breaker is turned on. If so, the power produced
by the generator might not be within the inverter’s acceptable range. Look at the generator requirements in Attachment C of the
installation manual. Some cheap generators do not produce power of sufficient quality to charge the batteries, even though
they can still run simple loads like fans and heaters. Another possibility is that the generator is supplying power to the loads and
there is not enough to recharge the batteries. Try turning off the Power OUT breaker for a while and see if the batteries are now
taking charge.
4.
How do I know if the battery is full/empty?
Because the Troppo batteries don’t interact/communicate with the inverter, the SOC is a calculation based on voltage
parameters. What this means is that the SOC is not always accurate.
The best way of estimating the SOC of the batteries is by analysing the Voltage. In the example on the right, if the battery has
about 53V, the SOC is neat to 100% (blue arrow). Or, if at 48V, the SOC is below 6% (red arrow).
With a range between 64 and 45 Volts, identify the SOC according to Appendix A in this manual.
Troppo-4841
State-of-charge (SOC) vs. battery
voltage (with no load)
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