10kW Kelvin BTMS Battery Thermal Management System - 400-800V HV Liquid Cooling/Heating Chiller Unit

For sale: One complete 10kW Battery Thermal Management System (BTMS) recovered from industrial outdoor lithium battery energy storage packs. Brand: Kelvin (柯诺威 / Shanghai Kelvin New Energy Technology Co., Ltd.). Model: BTMS_10KW. Part #: E0-80007-00.

Key Specs (from factory plate):

•  Cooling capacity: 10kW (refrigeration cycle)

•  High-voltage power: 400-800V DC (orange HV cables included)

•  Low-voltage control: 9-32V DC

•  Production date: April 2023

•  Full integrated assembly: compressor/controller, condenser/radiator, coolant pump, accumulator, valves, piping, and mounting frame Photos show the exact unit you’ll receive — clean, no major damage, all major components intact and ready for reinstallation. Removed from working industrial packs; functions as a plug-and-play chiller/heater once plumbed and powered.

What this does for your DIY battery build (explained for beginners):

If you’re building a big lithium pack (LiFePO4, NMC, or LTO) for off-grid solar storage, home ESS, EV conversion, or a Powerwall-style rack, passive cooling (just fans or natural air) isn’t enough once you scale past ~20-30kWh. Heat kills batteries — high temps cause faster degradation, reduced capacity, and thermal runaway risk during fast charging or heavy discharge. Cold weather slashes performance and can permanently damage cells.

This pro-grade Kelvin BTMS solves that completely. It actively circulates a glycol/water coolant loop through cold plates in your battery modules:

•  Cools up to 10kW of heat (keeps cells safely at 15-35°C even in summer or under heavy 1C+ loads)

•  Heats in winter (via heat-pump/reverse cycle or integrated PTC — matches commercial 10kW cooling / 6-24kW heating systems)

•  Dramatically extends battery life (often 2-3x longer cycles), allows faster/safer charging, higher continuous power output, and full capacity in any climate It’s exactly the same tech used in electric buses, heavy trucks, and grid-scale storage systems. For a DIYer, this turns your homemade rack into a professional-grade setup without the $3,000+ price tag of buying new. Just plumb the coolant ports to your battery cold plates, hook up HV power straight from your pack (400-800V), add 12V/24V control power, and you’re golden. Advanced users can tap CAN bus for full integration with your BMS.

Condition & Notes:

•  Recovered/used but excellent shape (see photos)

•  Includes the full sealed unit as pictured — no missing major parts

•  High-voltage safety warning: This is NOT a beginner toy. Requires electrical knowledge and proper fusing. Professional installation strongly recommended. Sold as-is for experienced DIY builders only.