Product Description
VMAX 36V Lithium Marine Battery Charger
The VMAX VBC3620LFP is a 36V 3-stage smart lithium battery charger and maintainer designed for portable charging or mountable for on-board marine and RV installations. It delivers up to 20 amps with a LiFePO4-specific profile for fast, safe charging and long battery life. A waterproof, mountable design and automatic maintainer capability allow continuous connection for shop, storage, or dockside use. Built to VMAX standards, it’s a reliable solution for 36V lithium systems that prioritizes safety and simplicity.
Features & Benefits
- Smart 3-Stage Charging – Optimizes charge time while maximizing battery lifespan.
- On-Board, Waterproof Construction – Permanent mounting option for onboard convenience.
- Automatic Maintainer Mode – Safe for long-term connection to keep batteries ready year-round.
- Multiple Connection Types – Alligator clamps and ring terminals simplify installation and daily use.
- Anderson Style Connectors – Allows charger to be connected and disconnected easily without tools.
- Extended Reach Convenience – 7.5 ft base cord plus 3.5 ft connection cable for 11 ft total reach.
- Wide Operating Temperatures – Suitable for environments from -20°F to 115°F for year-round use.
3-Stage Charging Profile
The VBC3620LFP uses a 3-stage profile optimized for 36 volt lithium batteries: Bulk at 43.8V up to 20A, Absorption at 43.8V tapering from 20A to 1A, and Float at 43.8V for long term maintenance without overcharge.
Why Choose a VMAX 36V Lithium Battery Charger?
The VBC3620LFP is a commercial grade 20A LiFePO4 charger for 36V systems that need on-board, waterproof installation. Its lithium specific setpoints, wide-range AC input, and included ring terminal & alligator clamp leads make it a straightforward upgrade for trolling motors, house banks, and other marine/RV loads. The long cord lengths and pre-drilled mounting brackets allow versatile installation options, and the float charge supports batteries that sit for weeks or even months between trips.
| Voltage | 36 Volts |
| Battery Type | Lithium (LiFePO4) |
| Bulk Charge Voltage @ 20A |
43.8 Volts |
| Absorption Charge Voltage |
43.8 Volts 20A - 1A |
| Float Voltage | 43.8 Volts |
| Operating Temperatures |
-20°F - 115°F |
| Connection Type | Alligator Clamps & Ring Terminals |
| Length | 11.5" (292 mm) |
| Width | 4.5" (114 mm) |
| Height | 3.2" (81 mm) |
| Weight | 6.85 lbs (3.1 kg) |
| Base Cord Length | 7.5' (2.3 m) |
| Charging Cord Length |
3.5' (1.0 m) |
| Input Voltage | 100-240V AC |
| Warranty | 1 Year |
