Ford E-Series (E350/E450) RV Chassis: Complete Guide
Essential guide for Ford E-Series Class C motorhome chassis covering suspension, maintenance, and common issues.
Essential guide for Ford E-Series Class C motorhome chassis covering suspension, maintenance, and common issues.
Master your RV electrical system from house batteries to shore power. Covers 12V DC, 120V AC, inverters, and charging.
Protect your RV from freeze damage with this comprehensive winterization and de-winterization guide.
Protect alternator from lithium battery high current draw using DC-DC charger for current limiting or temperature-controlled relay. DC-DC charger is best solution. Direct connection without protection risks alternator failure.
Your 30 amp generator will power any RV converter charger. For lithium, get charger with proper LiFePO4 profile. Progressive Dynamics, IOTA with IQ-Lifepo4, or Victron all work well. Match amp rating to battery bank capacity.
LiFePO4 lithium batteries like the Dyness can replace lead acid batteries, but you'll likely need to upgrade your converter/charger to a lithium-compatible model. The BMS protects the battery from overcharging and provides longer life with faster charging.
Check LiFePO4 at rest - 13.2-13.4V is full. Clean panels, check all connections for corrosion, verify charge controller is set for lithium. 2150W solar should charge easily if system is working.
Storage temp spec may be more lenient than charging temp - verify with your battery docs. Most LiFePO4 stores fine below zero. Options are indoor storage at 50% SOC or leaving in RV with heating pad. Main concern is charging temp not storage.
For 1800W toaster oven, need 2300W+ running watt generator at 80% capacity. Battery alternative requires 400Ah lithium with 3000W inverter. Most practical: hybrid approach with 200Ah battery for essentials and small generator for cooking.
Dual purpose lithium batteries work for coach use but dedicated deep cycle lithium is better for house banks. Dual purpose compromises between starting and cycling. For RV house batteries, deep cycle LiFePO4 provides better value and cycle life.
Your Ford E350 Class C likely has a factory-installed charge isolator or solenoid limiting current to 20 amps to protect the original lead-acid batteries. This is normal behavior and adding a DC-DC charger was the right solution for lithium batteries.
Install low voltage disconnect relay in line feeding Ecoflow alternator charger. Victron Battery Protect or similar cuts power at set voltage. Set disconnect at 12.8V for LiFePO4 to stop at about 20% remaining capacity.
Yes, you need a DC-DC charger to safely charge your lithium battery from your truck's alternator. Installing one between your truck's charge line and battery will prevent alternator damage and provide optimal lithium charging.
The 2017 Ford E450 has a 175-220 amp alternator depending on configuration. For DC to DC charging of LiFePO4 batteries, size your charger at 30-50% of alternator rating, typically 40-60 amps.
Sawtooth patterns in Victron MPPT readings are often normal during float charging. The controller pulses current to maintain voltage. Check if battery is charging properly - if so, patterns are normal.