Have the charger for sale for $150, only one year old works fine, just upgraded to a larger one, have the user manual I can send as well.
15 Amp Three Battery Application Charger
Meets all Guest Harsh Environment Guidelines
For Flooded, Gel and AGM Batteries
Self-Protecting under Extreme Conditions
Vibration and Shock Protected
Fully Potted to Waterproof Electronics
3-Stage Switching Electronic Circuit
Maintenance Mode Protects Batteries in Storage
Short Circuit Protected
Ignition Protected
Reverse Polarity Protected
Total Amps: 15
Number of Outputs: 3