Solution for Charging Lithium RV Batteries with Parallax 7345 Panel

Updated 08/06/2025 | Published 03/17/2024

Products Featured in This Question

Go Power Automatic Transfer Switch with Quick Connect Cables - Plastic Case - 30 Amp - 120V

(38)

$391.99

Progressive Dynamics 4000 Series Mini RV Converter w/ Charge Wizard and AC/DC Distribution Panel

(454)

$233.36

Question:

I have a Leisure travel 2011 free flight 30 amp class b rv.with a parallax 7345 converter. It also has an onan generator. I’m adding a 230 amp lithium battery with a 2000 watt inverter. I am planning to update the converter to fully charge the battery but need to know if I will need to add an additional transfer switch. Can you assist me please.

asked by: John

Expert Reply:

Hey John, you'd need a new panel like the Progressive Dynamics Mighty Mini part # PD4045KA which is the most similar to your Parallax 7345 except is Lithium battery compatible.

There isn't a lower section replacement available for what you have that would allow it to work with lithium batteries.

You would not need to change your current transfer switch or add an additional one.

expert reply by: Jameson C

John B.

3/19/2024

Thanks so much for the reply. I will be ordering the pd4045. My concern is accidentally running the generator or shore power when the new inverter is also on. Isn’t that a problem? Please advise.

Jameson C.

3/19/2024

@JohnB Do you have a transfer switch currently?

Bruce J.

8/6/2025

Hello Jameson, Your reply to John B. is misinformation. All John would need to do is replace the lower converter section with the Parallax 45RU if they plan to use one lithium battery or can upgrade to a 55amp with a 55RU for multiple batteries. This would only require dealing with 4 wires and would utilize the existing upper AC and DC distribution panels. Then they would only need to install the added 4400LBU lithium specific charging module. This would cost much less and require much less work for installation not to mention no modifications would be needed for the RV cabinet for fitment. Have a wonderful day Jameson.

Jameson C.

8/6/2025

@BruceJ If Parallax still offers that part that would work. We used to have a lower section replacement for that unit as well but we aren't able to get it any more which is why I recommended that route but thanks for the additional info!