HEELER RV ELECTRICAL · FIELD REFERENCES
Practical electrical references for RV technicians, electricians, builders and advanced owners who are diagnosing real systems. Battery capacity, charge sources, converter behaviour, solar recovery, DC-to-DC charging, monitoring and storage are treated as one electrical system.
These records describe individual systems. Recorded equipment, completed work, recommendations and missing measurements are identified separately. A match to your RV model is a starting point for comparison, not proof that your wiring is the same.
Heeler RV reviewed this Jayco Talon’s battery, charging and disconnect arrangement, replaced the flooded batteries with a 12 V / 240 Ah Trojan AGM bank, and prepared a custom owner’s manual covering the retained equipment, charging and storage. Lithium, inverter and shunt upgrades were not installed as part of this work.
READ THE FINDINGS AND LIMITATIONSUse these guides to understand a problem and prepare for a system review. Calculator outputs are estimates based on your inputs; general guidance is not a measurement or a compatibility guarantee for your RV.
Build daily Wh from actual loads, then compare battery carry, parked days, solar contribution and vehicle charging.
ChargingDC-to-DC ChargingAlternator source, input current, charger output, cable length, protection, voltage drop and useful Wh returned while driving.
Shore chargingConverter & Charger ReferenceCharge profile, output sizing, battery chemistry, conductor path and the difference between a weak battery and a weak charger.
Battery systemsLithium IntegrationBattery chemistry, converter compatibility, solar controller settings, charging paths, protection and monitoring.
SolarRV Solar SystemsArray size, roof constraints, controller limits, wiring, voltage drop and realistic daily charging contribution.
Battery sizingHow Many Amp-Hours?Turn daily electrical use into a practical battery-bank target instead of choosing capacity by guesswork.
RuntimeRV Battery RuntimeConvert Ah to Wh, account for usable capacity and inverter losses, and estimate realistic runtime from actual loads.
Solar sizingHow Much Solar?Size solar from daily energy use, charging conditions and the amount of battery energy that needs to be replaced.
DiagnosisBattery Not ChargingTrace shore, converter, solar and vehicle charging paths with measurements before replacing components.
Parasitic loadBattery Dies OvernightSeparate undersized storage from unexpected loads, poor charging and parasitic draw.
Starlink powerStarlink in an RVTranslate Starlink watts and hours of use into daily Wh, battery capacity and charging requirements.
These are the kinds of electrical questions this resource library is being built around.