Does a LiTime battery need a new charger or converter in my RV?
Short answer: Usually the charging source needs a lithium profile. LiTime recommends a 14.6V charger sized to the battery: 20A for its 100Ah Group 24 and Group 27, 40A for the 200Ah and 60A for the 230Ah. A converter that only does lead-acid voltages will run the battery but may never fill it.
What LiTime asks for
LiTime states a recommended charger for most of its RV batteries:
| LiTime battery | Recommended charger |
|---|---|
| 12V 100Ah Group 24 Bluetooth | 14.6V 20A |
| 12V 100Ah Group 27 Bluetooth | 14.6V 20A |
| 12V 100Ah TM | 14.4 ± 0.2V CC/CV at 20A |
| 12V 200Ah Bluetooth | 14.6V 40A |
| 12V 230Ah Bluetooth | 14.6V 60A, or a 60A MPPT |
Several of these batteries also need a charger connected to switch on at first use, so having the right charger is part of the install.
Why the old converter is the problem
Many factory RV converters were built for lead-acid and hold a lower voltage than lithium wants. The battery will power the RV, but it may sit partly charged for its whole life, and the state-of-charge reading in the app will tell you so. Converters that have a lithium mode, or replacements with one, avoid that.
Your options
- Replace the converter with a lithium-profile model of the right size.
- Add a dedicated lithium charger on shore power. The Renogy 12V 20A LFP charger matches LiTime's 20A recommendation for the 100Ah models; for 200Ah and up, the Victron Blue Smart IP22 has larger 12V variants.
- Do not forget the alternator path. Charging from the tow vehicle or chassis needs a DC-DC charger with a lithium profile, such as LiTime's 40A model.
Solar
Set the solar controller's battery type to lithium. LiTime's own 100A MPPT stops charging below 32°F and resumes at 41°F, matching the batteries' low-temperature limits.
What you need
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