This is a 48V charger built for daily field use — it plugs into a standard wall outlet, connects to your battery bank with an M8 ring terminal, and holds up outdoors with an IP65 rating. If you run a 48V lithium system and need a portable charger you can leave on-site, this is that part.
This charger is built around a fixed 57.6V DC output, which matches the charge voltage 48V lithium battery banks expect at full absorption. That fixed output — not a "universal" multi-voltage design — is what lets it charge efficiently without you needing to set voltage or chemistry profiles. The IP65 housing and M8 ring terminal connection reflect a design intended for field and outdoor use rather than indoor-only environments.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Critical Fitment & Requirements
- Output: 57.6V DC, 20A — sized for 48V nominal lithium battery banks.
- Battery-side connection: M8 ring terminal.
- AC input: 110VAC/220VAC cable for direct connection to a standard wall outlet.
- Enclosure rating: IP65 weatherproof.
- NOT rated for 12V, 24V, or 96V+ battery systems — the 57.6V output is specific to 48V nominal banks.
- NOT compatible with battery terminals other than M8 without a separate adapter or terminal change.
Loose M8 ring terminal connections are a common source of nuisance faults on 48V charge circuits — resistance at the lug heats up under sustained 20A draw and can trip a charger's internal protection or, worse, degrade the terminal over repeated charge cycles. Torque the M8 lug to the battery manufacturer's spec using a digital torque wrench rather than a standard hand tool, then verify the connection is cold under load with an infrared thermometer or multimeter voltage-drop check after the first full charge cycle. This is standard practice under NEC guidance on secure, low-resistance terminations for DC circuits, and it prevents localized heating that shortens terminal and cable life.
Key Benefits
- Fixed 57.6V DC output matched to 48V lithium chemistry — no manual voltage selection needed.
- 20A output current for practical daily recharge times.
- IP65 weatherproof housing rated for outdoor and job-site exposure.
- Compact, portable form factor for moving between sites or storage.
- Direct 110VAC/220VAC wall outlet compatibility — no external step-down transformer required.
- M8 ring terminal connection for a secure, torque-rated battery-side interface.
| Spec | Value | Unit |
|---|---|---|
| Output Voltage | 57.6 | V DC |
| Output Current | 20 | A |
| Nominal Battery Voltage | 48 | V |
| Input Voltage | 110/220 | VAC |
| Terminal Connection | M8 | Ring Terminal |
| Ingress Protection | IP65 | Rating |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: 48V nominal lithium battery systems that accept an M8 ring terminal charge input and a 57.6V DC / 20A charge profile.
- Fits: Installations with access to a standard 110VAC or 220VAC wall outlet.
- Does NOT fit: 12V, 24V, or 96V+ battery systems — output voltage is fixed at 57.6V DC.
- Does NOT fit: battery terminals other than M8 without a separate adapter.
| Category | Rating / Note |
|---|---|
| Ingress Protection | IP65 |
| Terminal Type | M8 Ring Terminal |
FAQ
What size are the terminal lugs?
This charger uses an M8 ring terminal for the battery-side connection.
Is this charger rated for 48V systems?
Yes. It outputs 57.6V DC, which is the correct absorption/float voltage for a nominal 48V lithium battery bank. It is not rated for 12V, 24V, or 96V+ systems.
What is the output current of this charger?
20A output current, per BigBattery's listed specification for this model.
Can I use this outdoors?
It carries an IP65 weatherproof rating, so it is built to handle dust and water exposure in outdoor or job-site conditions.
What wall outlet does this plug into?
It comes with a 110VAC/220VAC cable, so it plugs directly into a standard wall outlet without an adapter.
Warranty & Registration
Manufacturer warranty terms for this charger are not detailed in the source data provided. [NEEDS VERIFICATION] Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's official warranty documentation and registration process.
