If you use Skelcap ultra capacitor, you will have better performance and reliability. See below: The SkelStart ESM 2.0 outperforms the Maxwell Ultra 31/1800 in several key areas. It provides significantly more power, with improved cold cranking power, peak power, and lower equivalent series resistance (ESR), enhancing reliability, especially in cold temperatures 1 . The SkelStart ESM can deliver almost 50 kW of peak power at -40°C, which is nearly the same as Maxwell's at 0°C 1 . Additionally, the SkelStart ESM has a higher maximum voltage and can operate more efficiently in harsh conditions compared to the Maxwell Ultra 31/1800, which has been noted for its electrical sensitivity and failure in certain conditions