Heavy Duty High Output Jump Starter Pack For 12V AND 24V Batteries In Diesel Pusher Class A RV

Updated 02/05/2026 | Published 01/28/2026

Question:

Hey, I’ve got a diesel pusher RV and dual 12v batteries that aren’t easy to reach. Cable length matters to me. What is a good jump starter to look at? cold weather kills these batteries so I normally leave it running while getting lunch or dinner.

asked by: Ron

Expert Reply:

Hey Ron - that’s a really important detail, and yes, the cold is a complete menace to most batteries!

The Projecta Intelli-Start 3,000A jump starter # VX55NR uses 59-inch jumper leads, which are significantly longer than the other Projecta models. That extra reach makes a big difference on RVs and coaches where batteries are tucked away or spread out.

Between the cable length, 12V AND 24V support, and higher starting capacity, it’s a much better fit than smaller units for RV setups like yours. The price is a bit higher, but I like to "buy once cry once" and have the peace of mind.

Where are your batteries located on the coach?

expert reply by: Andrew N

Ron

2/5/2026

They’re in a rear compartment and pretty tight to get to, which is why cable length has been such a headache. One more thing, if the batteries are really run down from the cold, will this actually help bring them back, or is it just for quick jumps?

Andrew N.

2/5/2026

@Ron That helps a lot, Ron. That's definitely a scenario where the longer cables make a big difference. The # VX55NR isn’t only a quick “hit and hope” jump like most jump packs. Its manual override mode lets you apply power long enough to wake up a cold, heavily discharged battery before starting, which is huge for RVs or trucks that sit in freezing winter temps. Once it’s running, you can leave the clamps on and the unit recharges itself from the alternator, often in under a minute. If you don’t mind sharing, about how far apart are the batteries back there, and are they set up as 12V or 24V? This charger works for both configurations.