Owned the full technical lifecycle — presales solution design through after-sales support — for Pylontech's commercial, industrial, and residential BESS portfolio across North America, acting as the primary technical interface for partners, integrators, and service providers. • Designed presales proposals and tailored BESS system recommendations based on customer requirements, site feasibility, and application constraints — directly supporting sales in winning new accounts. • Served as key technical liaison for major channel accounts, building and maintaining C&I partnerships including MMW (NS,Canada), EIS, BBP (Battery Backup Power), and First Light Solar. • Led technical agreement discussions with partners and customers, clarifying system specifications, warranty terms, and performance expectations to reach final sign-off. • Acted as primary escalation point for BMS faults, SOC/SOH discrepancies, and communication failures (CAN/RS485/Modbus), performing root-cause analysis and coordinating preventative fixes. • Collaborated directly with global R&D and engineering teams in Shanghai to relay field/customer feedback into product improvements and resolve complex technical issues. • Established a full test lab and demo facility in Dallas to support customer evaluations, hands-on training, and pre-deployment diagnostics. • Built KPI frameworks and streamlined internal service processes, improving first-call resolution and response times. • Developed and delivered technical training programs, webinars, and white papers on BESS safety, lifecycle, and best practices for distributors and installation partners. • Represented Pylontech at RE+, Intersolar, and NABCEP CE, presenting product capabilities, competitive positioning, and completed applications to prospective clients.

• Provided Tier-2/Tier-3 technical support and presales consultation for grid-tied, off-grid, and BESS-integrated inverter systems. • Partnered with sales teams on design reviews, technical presentations, and proposal support to help close and commission projects. • Performed remote diagnostics and on-site commissioning, resolving grid synchronization, firmware, and communication faults; configured feed-in limits, charge/discharge profiles, and grid protection settings. • Managed RMA cases and advanced troubleshooting; collaborated with installers, EPCs, and utilities to ensure NEC/UL interconnection compliance. • Delivered technical training to installers and distribution partners; authored internal knowledge-base articles feeding firmware improvement cycles. • Represented Solis at industry conferences, strengthening brand presence and customer relationships.