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OutBack Power Systems
Lithium Battery Upgrade HELP
For Upgrading an Outback system from lead to lithium batteries (48V) ​the settings you need to change are:
0.
Set your Inverter DC Cutoff voltage to 24.0V - (This is very important to not drain your battery to a level it will trigger its internal low voltage protection)
3.
SET EQ charge to the same voltage as bulk
6.
Turn Temperature Compensation OFF
1.
Set Bulk/absorption charge to battery manufacturer specifications (LIFEPO4 is 56.8V normally) [You would set the inverter to the same settings]
4.
Set EQ Time to 0 or lowest setting
7.
Set any battery monitor / SHUNT charge efficiency to 98%
2.
Set Float charge to battery manufacturer specifications (LIFEPO4 is 55.2V normally)
5.
Set EQ to OFF if option available
8.
Set Absorb Time to 2 hours (setting is non-critical)
9.
Absorb End Amps: this one has a varying range; you can let me know what yours is set to. Also depends on wiring and components.
WE RECOMMEND USING an OutBack Mate3 Remote screen with your system. It has all the options in an easy to use interface.
STEPS to recover drained lithium battery for Outback off grid solar power systems
1. Have a working multimeter ready, set to DC voltage
2. Shutoff a DC breaker to inverter (large breaker usually, rated 175A or 200A).
3. Disconnect the positive battery cable from battery and put in a safe spot not touching metal (you may tape it with electrical tape) - make sure it does not touch the negative terminal
4. Put your multimeter probes to the positive and negative terminals of the battery and get a reading - if possible take a picture and send to me, or note there reading and text to me - 707-234-7395
5. If 12V battery reads under 10.0V, or 24V battery reads under 20.0V or a 48V battery reads under 40.0V, that usually means its internal low voltage shutoff has been triggered. In some cases, this means the battery needs to be jumped back on. This instructions also apply if battery is a very low state of charge (10.0V to 12.2V for 12v battery, 20.0V to 24.4V for 24V battery or 40.0V to 48.8V for 48V LIFEPO4 batteries)
6. Sometimes letting the battery rest for 30 minutes or overnight it will kick itself back on. Other times you should jump it.
7. Use a 24V battery source or 24V battery jump starter (can purchase on AMAZON) to boost the battery on.
8. Having a spare lead acid battery/bank of 24V is good to have for backup. If you have 2x 12v batteries, get them to the same state of charge before putting in series for 24 volt.
9. To jump start from a 24v spare battery, use battery cable from the jumper battery, hold the positive to your normal battery positive and the jumper negative to your normal battery negative, hold for 10 seconds, you may see a spark. Now test again the normal battery with the multimeter to see if it has revived above 23.0V
10. You now want to charge the battery immediately. Connect a solar charge or a wall charger to charge the 24V before you can use it. If using solar, let it charge for a day, then you can turn on the system again once the battery has some proper charge.
11. Once you're reconnected, go into your outback settings and set things properly as listed at the top of this page, especially the DC CUTOFF - set to 24.0V so that when the battery is low the system shuts off and the battery does not turn on its internal protection.
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