Upgrading Power Dynamics 4500 Power Center With Lithium-Compatible Setup In 2016 Keystone Impact RV

Updated 10/29/2026 | Published 10/28/2026

Question:

Hi My name is Chris and I’m wanting to upgrade my power distribution box in my rv. I have a 2016 impact from keystone. The distribution box part number I believe is PD4590K18L. I do have 2 AC units so it is a 50 amp service. I’d like to get a smart distribution panel because I was wanting to upgrade to lithium batteries soon. Any suggestions would be great thank you! Chris

asked by: Chris G

Expert Reply:

Hey Chris,

For your PD4590K18L, I recommend the Progressive Dynamics 4500 Series Power Center # PD4590K18LS8. This is the current 50-amp replacement with the same 90-amp converter output, so it will work well with the 50-amp service and dual A/C setup in your Keystone Impact.

The big upgrade is that this version has Progressive Dynamics' Charge Wizard and can be switched between lead-acid and lithium charging profiles, so you'll be ready when you make the move to lithium batteries. Since your trailer is a 2016, I would replace the complete power center rather than trying to update just the older converter section.

Are you planning to go with a single lithium battery or a larger multi-battery bank?

expert reply by: Andrew N

Chris G.

10/28/2026

I’ll probably go with multiple larger bank batteries. So with the Progressive Dynamics 4500 Series Power Center # PD4590K18LS8 does it automatically detect the lithium battery or is there a switch that needs to be manually flipped to change the inverter to lithium?

Andrew N.

10/29/2026

@ChrisG The Progressive Dynamics # PD4590K18LS8 doesn't automatically detect lithium batteries. You'll need to manually flip the switch from lead acid (LA) to lithium (LI) on the DC distribution board behind the front panel. Once switched, it'll charge your lithium batteries at the appropriate voltage!