Heeler RV Electrical

RV DC-TO-DC CHARGING · KELOWNA / OKANAGAN

CHARGE THE RV WHILE YOU DRIVE.

DC-to-DC charging can turn travel time into useful battery recovery, especially with lithium. The right setup depends on the tow vehicle or motorhome alternator, cable length, available current, battery chemistry and how much charging you actually need on the road.

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What gets reviewed

The vehicle and RV are treated as one charging path so the charger, conductor size and protection are matched to the real installation.

System review

  • Tow-vehicle or alternator charging source and available current
  • Existing 7-way charge circuit and what it is currently doing
  • Lithium battery-bank size and desired travel-time recovery
  • DC-to-DC charger output and input-current requirements
  • Cable length, conductor sizing and voltage drop
  • Protection at both ends of the charging circuit
  • Ignition or engine-run control where required by the charger design

When DC-to-DC charging may help

  • The RV battery arrives at camp with little meaningful recharge from the tow vehicle
  • A lithium bank has more charge capacity than the factory 7-way circuit can usefully provide
  • Solar production is inconsistent while travelling or during shoulder seasons
  • You move camps frequently and want travel time to contribute to charging
  • A camper van or motorhome needs a controlled alternator-to-house-battery charging path

A practical RV-first process

1Understand the RVExisting batteries, converter/charger, solar, distribution, tow charging and the loads you actually want to run.
2Size the system togetherBattery capacity, charging sources, inverter loads, protection and wiring are considered as one electrical system.
3Install and verifyConnections, protection, charging behaviour and system operation are checked before the job is considered complete.

Common questions

Why not just use the factory 7-way charge wire?

A factory charge line can provide some current, but long cable runs and relatively small conductors often limit useful charging. A DC-to-DC charger provides controlled charging and can make better use of a properly sized dedicated circuit.

How many amps should a DC-to-DC charger be?

Charger size depends on the alternator or tow vehicle, battery bank, travel time and wiring that can reasonably be installed. Bigger is not automatically better.

Can DC-to-DC charging and solar work together?

Yes. They are separate charging sources and can complement each other when each controller is configured for the battery system.

Related RV electrical services

Lithium battery upgradesMatch the charging system to a higher-use battery bank.RV solar installationAdd charging while parked and camping.RV electrical troubleshootingTrace weak or inconsistent tow-charge performance.
Mobile service area: Kelowna · West Kelowna · Lake Country · Peachland · Summerland · Vernon · Penticton. Service availability depends on the job and location.

Start with the RV you already have.

Send the basic RV information, the loads you want to run and a few photos. That gives Heeler RV Electrical a useful starting point before equipment gets recommended.

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