Product Description
VMAX VBC3620LFP LiFePO4 On-Board Charger & Maintainer
The VMAX VBC3620LFP is a 36V 3-stage smart lithium battery charger and maintainer engineered for on-board marine and RV installations. It delivers up to 20A 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 storage or dockside use. Built to VMAX standards, it’s a reliable solution for 36V lithium systems that prioritizes safety and simplicity.
VBC3620LFP Features:
- Smart 3-Stage Charging – Optimizes charge time while maximizing battery lifespan
- On-Board, Waterproof Construction – Permanent mounting for convenient use
- Automatic Maintainer Mode – Safe for long-term connection to keep batteries ready
- Multiple Connection Types – Insulated alligator clamps and ring terminals simplify installation and daily use
- Anderson Style Connectors – Allows charger to be connected and disconnected easily without tools
- Extended Cable Lengths – 7.5 ft base cord plus 42 in charging lead (≈11 ft total) for extended reach
- Wide Operating Temperatures – Operates from −20°F to 115°F for year-round use
- Compact Size – 11.5" x 4.5" x 3.2" housing improves mounting options
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 the VBC3620LFP?
Within VMAX’s lithium charger lineup, the VBC3620LFP is the purpose-built 20A LiFePO4 option for 36V systems that need on-board, waterproof installation. Its chemistry-correct setpoints, wide-range AC input, and included ring/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. Backed by VMAX with a 1-Year warranty.
| Input Voltage | 100-240VAC |
| Battery Type | LiFePO4 |
| Nominal Voltage | 36V (38.4V) |
| Bulk Charge Voltage @ 20A |
43.8V |
| Absorption Charge Phase |
43.8v 20A - 1A |
| Float Voltage | 43.8V |
| Operating Temperature |
-20°F - 115°F |
| Connection Type | Alligator Clamps & Ring Terminals |
| Length | 11.5" |
| Width | 4.5" |
| Height | 3.2" |
| Weight | 6.85 lbs |
| Wall Cord Length | 7.5' |
| Charging Cord Length |
42" |
