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6. FAQ / TROUBLESHOOTING
6.1 Frequently asked questions (FAQ)
Can I continue to use my previous
charger?
It depends on which charger is installed. If the charger
has a setting for GEL or AGM batteries, it can usually be
used. However, the final charging voltage should not ex-
ceed 14.6V. Charging curves for lead-acid batteries with
liquid electrolyte must not be used. Ideally, the charger
should have an IU characteristic curve for LiFePO4 bat-
teries.
Which LiFePO4 battery do I need to
replace my two heavy AGM batte-
ries with 95Ah each?
If the previous capacity was sufficient, two 95Ah AGM
or gel batteries can be replaced with one 100Ah battery.
Should the lithium battery remain
permanently on the charger over
winter?
This is not necessary, on the contrary. Fully charge the
battery to approx. 60-80%, then disconnect or discon-
nect the battery from the vehicle.
In my vehicle it sometimes gets
50°C and more in the summer. Will
this damage my lithium battery?
The lithium batteries can be operated up to 60°C wit-
hout any problems.
And what does it look like at
sub-zero temperatures?
Discharging down to -20°C is also possible here, but
when charging below 0°C, charging must be limited or
prevented. This can be done with a charge booster and /
or a temperature-controlled charger.
Do the batteries fit into the instal-
lation space in which my previous
batteries were installed?
If 92-95Ah AGM batteries or 80Ah GEL batteries were
installed, the lithium battery will also fit, it has the same
dimensions and mountings. In the VW Bus the 90Ah fits
under the seat, in the Ducato the 100Ah.
Does the lithium battery always
or regularly have to be completely
discharged?
No, lithium batteries do not have a memory effect, they
can be operated constantly in a partially charged state.
Is it true that lithium batteries are
very expensive compared to lead
batteries?
No, the opposite is the case. Lithium batteries have
the lowest costs per cycle compared to lead batteries,
this is due to the high number of cycles. Of course, the
purchase price is many times higher, but here, too, prices
have fallen sharply in recent times.
Can I also operate an inverter in the
vehicle on my lithium batteries?
Lithium batteries are particularly suitable for inverter ope-
ration, as the voltage level remains constantly high du-
ring discharge and thus the inverter does not switch off.
However, the maximum continuous discharge current of
the battery must not be exceeded.
Can I expand lithium batteries
with a parallel connection of other
batteries?
Yes, as long as the manufacturer, type and capacity are
the same. Also, the age should not be too far apart, as
well as the voltages of the battery must be aligned.
Further questions?
Please contact your seller or ask us by email: service@
fritz-berger.de
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