Frequently Asked Questions

Solterra primarily focuses on Light Electric Vehicles (LEVs), offering solutions such as:

• Portable and onboard chargers for 2-wheelers and 3-wheelers
• Onboard chargers and communication modules for 4-wheelers
• Communication modules for public DC fast-charging infrastructure

Most of our products operate in the low-voltage domain, though we also offer select high-voltage solutions.

In addition to products, we provide engineering services including system design, concept development, enclosure design, and license-based technology transfers.

Our flagship product—the LEV DC Fast Charger (IEC 61851-25)—is currently under development and is planned to be launched in collaboration with the Bharat Charge Alliance (BCA).

Yes. We regularly customize CAN protocols to suit specific vehicle and BMS requirements. Our team works closely with customers to define message structures, fault handling, diagnostics, and overall system behavior for seamless vehicle integration.

Solterra chargers support all major battery chemistries, including:

• Lead Acid (VRLA and Flooded)
• Lithium-ion families such as LFP, NMC, NCA, and LTO

Charging profiles can be fully tailored based on chemistry, voltage, current, and lifecycle requirements.

Charging time depends on the charger power rating and the battery pack’s ability to accept power.
Our chargers range from 300 W to 12 kW, enabling charge times from under an hour to over 8 hours, depending on the application.

Yes. Solterra offers extensive customization options, including:

• Housing and industrial design
• Cable length and connector type
• RCD and protection features
• Firmware behavior and CAN messages
• Colors, branding, and LED indications
• Handles, mounting brackets, interlocks, and auxiliary power outputs

Yes. Our chargers are environmentally sealed and designed to withstand dust, water, vibration, electrical noise, and surges. With suitable customization, they can be used in portable, wall-mounted, or onboard configurations.

Environmental exposure is a major cause of power-electronics failure due to dust ingress, humidity, PCB dendrite formation, and arc tracking.
All Solterra chargers are IP67-sealed, ensuring high reliability and a long operational life even in harsh conditions.

Our chargers include comprehensive protections such as:

• Over-temperature
• Reverse polarity
• Short-circuit and overload protection
• Over-voltage and under-voltage protection
• Automatic cutoff and fault isolation
• Surge protection, EMI/EMC compliance
• Shock and vibration resistance

Additional protections can be implemented based on project requirements.

We do maintain reference pricing, but quotations are typically shared after finalizing technical requirements, drawings, and estimated annual volumes.

Yes. Our 4W portfolio includes:

• Onboard chargers
• Vehicle communication controllers (CHAdeMO, ISO 15118, GB/T)
• EVSE and charging communication modules

During AC-to-DC conversion, a small amount of power is lost as heat. Active cooling ensures the charger remains within safe operating and touch-safe temperature limits, improving reliability and extending product life.

Our chargers support a wide range of charging algorithms, including:

• CC-CV profiles
• Pulse and fast-response charging
• Smooth soft-start and controlled end-of-charge behavior

Slew rates and regulation accuracy are tuned to meet demanding battery and BMS requirements.

Solterra can manufacture over 25,000 chargers per month, with the ability to scale production based on customer demand and program timelines.

Our chargers currently support voltages ranging from 12 V up to 500 V, depending on the product family.

Solterra chargers are used across a wide range of applications, including:

• Electric two-wheelers and three-wheelers
• Golf carts and recreational vehicles (RVs)
• Electric motorcycles and marine systems
• Robotics, industrial equipment, and specialty battery systems

We support 10–15 standard connector options across AC and DC interfaces. Proprietary or customer-specific connectors can also be integrated.

Simply contact us. We will share a Customer Parameters Request Form, which helps capture electrical, mechanical, and functional requirements to recommend the right solution.

Absolutely. Once you complete the parameters request form, our engineering team will recommend the most suitable charger and configuration.

We typically offer a standard 3-year warranty, subject to usage conditions and contractual terms. Annual Maintenance Contracts (AMC) can also be arranged through bespoke agreements.

Yes. Our products are designed to comply with applicable IEC, AIS, and automotive standards, depending on the application and market.

Yes. We offer OEM and white-label solutions, including custom branding, labeling, and documentation.

Yes. We support prototyping, pilot builds, and pre-production runs, followed by volume scaling.

We provide complete technical documentation, including CAN files, pinouts, mechanical drawings, and test reports, along with engineering support during integration.

We support everything from prototypes and pilot runs to volume production of 25,000+ units per month. Indicative timelines: samples in 2 weeks and production in 4-6 weeks after specifications are frozen. MOQ depends on the product and level of customization, and pilot/low-volume orders are welcome.

Solterra Technologies is an Indian company, with design and manufacturing in India and offices in Ghaziabad, Bengaluru and manufacturing in Chennai and Bengaluru. Our facility can produce 25,000+ chargers per month, scalable to program demand.

Yes. Alongside our India range we offer UL/CE-rated certified portable chargers for North American and European deployment, and we export to EU, Africa, South Asia. Share your destination market and we’ll confirm the right certified variant.

Yes. Once we capture your requirements via the Customer Parameters Request Form, we provide samples or evaluation units so you can validate fit and performance before committing to volume.

Over CAN (2.0B / J1939), the charger and your BMS exchange target voltage and current, state-of-charge, temperature and fault status in real time. We tailor the message map, handshake and fault handling to your BMS for seamless integration.

Chargers: CAN 2.0B / J1939, RS485, and charge-control signals. Controllers and EVSE: CCS (DIN 70121 / ISO 15118), CHAdeMO (IEC 61851-25 / IS 17017-25), GB/T, and OCPP for networked charging.

Our chargers are rated for −25 °C to +65 °C, with forced-air cooling and IP67 sealing. Above the rated ambient, output is intelligently derated to keep the unit and battery within safe limits, then recovers automatically as temperature drops.

Yes. Firmware — including charging profiles and CAN behaviour — can be updated via CAN Tool / service tool / OTA Tool where supported, so units can be re-configured or improved after deployment.

IEC 61851-25 is the standard for DC fast charging of light electric vehicles. Our flagship LEV DC Fast Charger, under development with the Bharat Charge Alliance (BCA), brings standardised, interoperable DC fast charging to electric 2- and 3-wheelers and all Light EVs.

They are the major EV charging-communication standards: CCS (Europe/US, using DIN 70121 / ISO 15118), CHAdeMO (Japan), and GB/T (China). Solterra builds EVCC and EVSE controllers for all of them, so vehicles and chargers communicate reliably.

Yes. Our products are designed to the applicable Indian standards (AIS-156, IS 17017) and international IEC and automotive standards for the target application and market.

Match your battery pack voltage (12–96 V for most light EVs) and the charge time you need to one of our 300 W–12 kW models. Share your details in the Parameters Request Form (on request) and our engineers will recommend the exact rating and configuration.

Solterra chargers are designed and customized for India, IP67-sealed for harsh duty (electrical and mechanical, and deeply customizable (CAN, firmware, housing, connectors). You also get a 3-year warranty, local engineering support, and capacity for 25,000+ units/month — without import lead times and duties.

Yes. Beyond our product range we provide system design, concept development and enclosure design, plus license-based technology transfer for partners who want to manufacture under their own programme.

Sinpro is both a supplier/technology partner and a commercial partner to Solterra. The relationship spans hardware supply, distribution, and joint go-to-market efforts. Solterra and Sinpro collaborate for the Sinpro EV Show Center initiative, a joint showroom effort with planned locations in Ghaziabad and Bangalore.

Yes (PMSM/IPMSM + FOC controllers, 6–7.6 kW).

Yes our EVCCs support it.

Yes. Our Series power modules are well suited to battery-swapping cabinets, supporting wide-output DC charging with CAN-based control for multi-slot, independent-channel charging. We can tailor the module count, output range and communication map to your swap-station architecture.

Yes. Our chargers suit fleet and depot charging for electric 2-, 3- and 4-wheelers, with CAN-based control for overnight and opportunity charging across multiple vehicles. IP67 sealing and a −25 °C to +65 °C rating handle outdoor and high-duty depot environments, and we can scale capacity and add OCPP networking for centralised monitoring and load management.

Yes. As an Indian company with local engineering support, we provide after-sales service and spares from warehouse to warehouse across India, backed by a 3-year warranty. Our team handles diagnostics, repairs, replacement units and spare parts, with depot and remote support to minimise downtime.

Yes. We welcome distributors and channel partners across India and export markets. Partners get access to our full charger and power-module range, along with technical training, engineering support and co-marketing. Share your region and target segments and our team will discuss territory, terms and onboarding.

An onboard charger (OBC) is a power converter built into an electric vehicle that turns AC mains power into the DC current that charges the battery — so the charger travels on board with the vehicle. OBCs are typically 1–11 kW, CAN/J1939-controlled and IP67-sealed for vibration and weather. Solterra builds OBCs for light electric vehicles (LEVs), commercial EVs and off-highway machines.

An offboard charger (off-board, or DC fast charger) is a stationary unit at a charging station or depot that converts AC to DC outside the vehicle and feeds DC straight to the battery. Because it sits off the vehicle it can be far higher power (tens of kW and up). Solterra power modules are the building blocks of offboard chargers, battery-swapping stations and depot charging.

An onboard charger rides inside the vehicle and converts AC to DC on board (convenient, lower-power, slower). An offboard charger is a fixed station that converts power outside the vehicle and delivers DC directly to the battery (higher-power, enables DC fast charging). Most light electric vehicles charge with an onboard or portable charger; public fast-charging uses offboard chargers.

A light electric vehicle (LEV) is a small, light EV — electric two- and three-wheelers (e-scooters, e-rickshaws, delivery trikes), e-bikes, forklifts and similar micro-mobility. LEVs are the fastest-growing EV segment in India and Asia and usually run 24–96 V packs, charged by portable or onboard chargers rather than high-voltage DC fast chargers.

Match the portable charger to (1) your pack voltage (24–96 V for most LEVs), (2) the AC supply you have (single- or three-phase), (3) the charge speed you need in kW, (4) the chemistry/profile (lithium or lead-acid, CC/CV), and (5) the environment — for field use pick an IP65–IP67 sealed, rugged unit. Solterra portable chargers are IP67-sealed with configurable CC/CV profiles for two- and three-wheelers and light EVs.

A DC-DC converter steps the high-voltage traction battery down to a stable low-voltage rail (typically 12–13.8 V) that powers auxiliary loads — lights, controllers, sensors and infotainment. Solterra offers isolated and non-isolated DC-DC converter modules with a wide input range and IP67/IP68 sealing for electric vehicles of every size.

A power module is a compact, self-contained AC-to-DC conversion block (rectifier + active PFC + regulated DC output) that stacks to build larger chargers. Several modules combine into a scalable offboard DC fast charger without redesigning each part. Solterra power modules offer active PFC, a wide 200–1000 V output and hot-swap support for fast-charging, battery-swapping and depot infrastructure.