58.8V 40Ah Electric Hydrofoil Battery Pack — IP68 Waterproof Underwater Hot-Swap NCM Battery, Factory Direct OEM
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Balder Power 58.8V / 40Ah NCM lithium battery pack engineered for electric hydrofoil boards, underwater thrusters, and e-scooter propulsion systems
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IP68 waterproof, tested to 10–20m submersion depth; supports underwater hot-swap battery exchange without surfacing
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110–130A continuous discharge (2.75C) — sustains 6,000–8,000W motor systems at full load; max charge current 0.5C
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RS485 BMS communication port; Panasonic-process cell manufacturing; Japanese-imported IC multi-level protection
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UN38.3, CE, CB, ISO, CCC, PSE certified — factory direct wholesale, custom voltage / capacity / waterproof rating / OEM accepted
Descrição do produto
The Balder Power 58.8V 40Ah NCM lithium battery pack is purpose-built for the electric hydrofoil, underwater thruster, and marine e-scooter market segment where three operational requirements are non-negotiable: high-depth waterproofing, high-rate continuous discharge, and the ability to exchange the battery mid-session without removing the board from the water.
At 58.8V fully charged with a 40Ah capacity, this pack delivers approximately 2,352Wh of usable energy — enough to sustain a 6,000–8,000W lift motor through extended riding sessions while maintaining a continuous discharge rate of 110–130A (2.75C). The 395 × 300 × 90 mm form factor and 12.5 kg weight were designed to fit the hull battery compartments used across the majority of production eFoil platforms without structural modification, allowing direct drop-in integration for board OEMs and retrofit deployment into existing rental fleets.
The IP68 waterproof rating is validated to 10–20 meters submersion depth — the defining technical differentiator in this product category. Where standard IP67 batteries are designed for momentary immersion, the Balder Power pack uses a multi-barrier sealing system that maintains integrity under sustained hydrostatic pressure at depth. This enables the pack’s headline operational feature: underwater hot-swap capability, meaning a depleted pack can be replaced with a charged unit without surfacing the board, dramatically increasing daily session throughput for rental schools and resort operators. The enclosure uses Panasonic-process cell manufacturing standards internally, with Japanese-imported IC protection logic providing multi-level safeguards covering overcharge, over-discharge, over-temperature, and short-circuit conditions.
For procurement teams evaluating this battery for fleet supply, B2B distribution, or OEM board manufacturing, the RS485 communication port enables real-time state-of-charge and health telemetry integration with motor controllers and rider remotes. Custom configurations — including voltage, capacity, enclosure dimensions, and IP waterproof rating — are accepted with OEM/ODM agreements.
Parâmetros técnicos
| Parâmetro | Especificação |
|---|---|
| Marca | Balder Power |
| Química | NCM / LiFePO4 (configurable) |
| Tensão Nominal | 51.8V (nominal) / 58.8V (fully charged) |
| Capacidade nominal | 40Ah |
| Energia | ~2,352 Wh |
| Classificação IP | IP68 — Submersible 10–20 meters depth |
| Corrente máxima de descarga contínua | 110–130A (2.75C) |
| Corrente de carga máxima | 0.5C |
| Porta de comunicação | RS485 |
| Underwater Hot-Swap | Supported |
| Proteção | Overcharge, Over-discharge, Over-temperature, Short-circuit (Japanese-imported IC) |
| Cell Process | Panasonic manufacturing standards |
| Temperatura de operação | −20°C to +60°C |
| Ciclo de vida | 500–2,000 cycles |
| Dimensions (L × W × H) | 395 × 300 × 90 mm (15.55 × 11.81 × 3.54 in) |
| Peso | 12.5 kg (27.56 lb) |
| Certificações | UN38.3, CE, CB, ISO, ICC, CCC, MSDS, PSE |
| Garantia | 12 meses a partir da data de envio |
| Aplicativo | Electric hydrofoil boards, underwater thrusters, underwater e-scooter propulsion |
| OEM / ODM | Accepted — voltage, capacity, dimensions, IP rating, enclosure markings customizable |
| Local de origem | Guangdong, China |
Características e vantagens
✅ 🌊 IP68 to 10–20 Meters: True Deep-Water Waterproofing
The Balder Power pack is rated and tested to IP68 at 10–20 meters submersion depth, meeting the operating conditions of high-performance eFoil boards that routinely submerge the battery compartment during aggressive riding, wipeouts, and dock launches. The sealing architecture uses dual-barrier O-ring gaskets at the enclosure join line combined with epoxy potting compound at all cable penetration points, ensuring no single seal failure creates an ingress path. This standard goes substantially beyond the IP67 rating common in recreational marine accessories, which is certified only for momentary immersion to 1 meter — inadequate for active hydrofoil operation where the hull sits at or below the waterline throughout a session.
✅ ⚡ Underwater Hot-Swap: Zero Downtime Battery Exchange
The pack is specifically engineered to support underwater battery exchange — the connector and locking mechanism allow a depleted unit to be removed and a charged unit installed while the board remains in the water, with no requirement to surface, dry internal compartments, or remove the board for turnaround. This capability was developed directly in response to the operational workflow of rental schools and resort operators where maximizing the number of paid sessions per board per day is a primary revenue driver. The 0.5C maximum charge current allows a depleted pack to return to full capacity in approximately two hours on a compatible shore charger, maintaining a charge rotation schedule that keeps boards active across a full operating day.
✅ 🔋 110–130A Continuous Discharge with TOP Japanese IC Multi-Level Protection
At 110–130A continuous (2.75C), this pack delivers sustained power output to 6,000–8,000W motor systems without thermal throttling under normal operating conditions. The BMS uses Japanese-imported IC protection logic providing multi-level full-envelope coverage: overcharge protection, over-discharge cutoff, over-current response, over-temperature shutdown, and short-circuit protection — all operating within milliseconds of fault detection. Cell manufacturing follows Panasonic-process standards, providing the cell consistency and formation quality required for reliable 2.75C operation across the rated 500–2,000 cycle life. The RS485 communication port allows the battery to report voltage, state of charge, and fault status to the motor controller and rider remote in real time, reducing overdischarge events and warranty claims in fleet operations.
Embalagem e entrega
Embalagem segura e em conformidade
Para garantir o transporte seguro de mercadorias perigosas da Classe 9, todas as baterias são protegidas com Lã de pérola de alta qualidade (espuma EPE) e envolto em Caixas certificadas pela ONU. Para envios em grande quantidade, utilizamos embalagens resistentes. Paletes de madeira compensada ou plástico Embalado em filme termoencolhível, em total conformidade com as normas internacionais de transporte.
Opções de envio global (Incoterms)
Oferecemos condições de envio flexíveis para atender às necessidades do seu negócio, incluindo: FOB, CIF e DDP (Porta a Porta com impostos incluídos).
- Por mar: A opção mais econômica para pedidos em grande quantidade.
- Por via aérea/expressa: Entrega rápida de amostras (DHL/UPS/FedEx).
- De trem: Serviço CR Express confiável para os mercados europeu e da Ásia Central.
Prazo de Produção
Nosso prazo de entrega varia de acordo com a personalização do produto:
| Tipo de produto | Amostras | Pedido em grande quantidade |
|---|---|---|
| Modelos padrão | 5 a 7 dias | 14 a 20 dias |
| Modelos personalizados | 7 a 14 dias | 14 a 28 dias |
Padrões Globais de Segurança e Conformidade com o Fabricante Original do Equipamento (OEM)
Ao integrar uma bateria de lítio personalizada em seu dispositivo, a conformidade com as normas regulamentares é imprescindível. Na Balder Power, nossas soluções de baterias OEM são projetadas desde o início para atender aos rigorosos testes de segurança internacionais. Garantimos que suas baterias personalizadas atendam aos padrões de desempenho CE, UL e IEC, além de fornecer os relatórios obrigatórios UN38.3 e MSDS necessários para um envio global sem problemas. Da prototipagem inicial à certificação final, eliminamos os obstáculos à conformidade para acelerar a entrada do seu produto no mercado.
Perguntas frequentes
Q1: What is the actual tested waterproof depth of this battery?
The Balder Power pack is IP68 rated and tested to 10–20 meters submersion depth, with vacuum pressure testing and water-tank immersion performed on every production batch. This substantially exceeds the IP67 standard used by most recreational marine accessories, which covers only momentary immersion to 1 meter — insufficient for active eFoil operation where the battery compartment remains at or below the waterline throughout a session. Third-party test reports are available upon request for distributor qualification audits.
Q2: How does the underwater hot-swap feature work in practice?
The battery can be swapped while the board remains in the water, without surfacing or drying the battery compartment. The connector and locking mechanism are optimized for underwater operation with no special tools required. For best results, keep both hands submerged during the exchange to prevent air from entering the connector mating surface. This feature is particularly valuable for rental school and resort operators looking to maximize daily board utilization without interrupting session flow.
Q3: What is the minimum order quantity and is OEM/ODM customization available?
Standard wholesale minimum order is 10 units, with tiered pricing at 30, 50, and 100+ units. OEM/ODM customization covers voltage, capacity, enclosure dimensions, IP rating, RS485 protocol register mapping, and enclosure logo or color. OEM minimum is 50 units with a 7–10 working day lead time after sample approval. Engineering samples (1–3 units) are available before volume commitment. All shipments include full UN38.3 documentation for air and sea freight compliance.
Q4: What are the RS485 communication port specs and is CAN-bus motor controller compatibility available?
The RS485 port supports 9,600–115,200 baud. Protocol register mapping documentation is provided after purchase intent confirmation. For motor controllers using CAN-bus exclusively, an RS485-to-CAN bridge module (not included) achieves full compatibility. Custom BMS firmware for specific controller protocol requirements is available on OEM orders.
Q5: Does the battery support series or parallel configurations?
Series configuration is fully supported — two packs in series deliver 117.6V for higher-voltage motor systems. Parallel configuration requires an external pre-charge relay and voltage matching within 0.2V between packs before connection to prevent cross-charging current. OEM orders can include a parallel-enable safety lockout in the BMS firmware that blocks connection if the voltage delta exceeds the configured threshold. All electrical parameters are customizable for OEM system integration.
Q6: How should the battery be maintained in saltwater environments?
Rinse the external connector face with fresh water after each saltwater session and apply dielectric grease to the mating surfaces every 30–50 cycles. The O-ring seals can be inspected without special tools and should be checked for deformation or surface cuts every 200 cycles. Replacement seal kits are available as a spare part. External enclosure surface oxidation is cosmetic and does not affect IP rating unless the anodizing layer is mechanically damaged.
