Improve limited EV dashboards and control charging with a smart aftermarket module

Many older and niche electric vehicles lack modern telematics and granular charging controls, leaving owners and small fleet operators unable to schedule charge, manage battery health, or optimize charging against rooftop solar. Approximately 6.0 million urban and small EVs globally represent this gap, and owners often have no OEM upgrade path. A compact aftermarket module that taps the vehicle CAN/OBD port, provides local edge intelligence for solar-aware and battery-preserving charge control, and pairs with a smartphone/web dashboard plus OTA updates could add both safety and convenience; an expected hardware-plus-service price around the $600 average aligns with demonstrated consumer willingness to spend. The timing is favorable because this submarket represents a $3.6 billion opportunity (6.0M vehicles × $600), while rising residential solar adoption and a stronger owner focus on battery longevity increase retrofit demand. This product can stand out through deep vehicle-specific integration (per-model harnesses and calibrated SOC/BMS profiles), edge-first privacy-preserving analytics to minimize cloud dependency, and installer and insurer partnerships to reduce user friction and liability. Strengths include a relatively low-competition retrofit niche and attractive unit economics with potential recurring telematics or smart-charging subscriptions; challenges are non-trivial — achieving broad hardware compatibility across models, securing safety and EMC certifications, and managing OEM warranty concerns will require capital and technical rigor. If you can demonstrate reliable vehicle integration and clear customer ROI in terms of battery life extension and solar self-consumption gains, the opportunity is worth pursuing, but expect a 12–24 month productization and compliance runway before scalable revenue.