SuiteCRM Opencart Integration is seamless and real-time, no dependency on admin to run a Cron job to pull or push data. “Once the information is keyed in one system it will push data to other systems instantaneously”.
OpenCart Integration - SuiteCRM E-COMMERCE Plugin is a free open source e-commerce platform for online merchants.
https://store.suitecrm.com/addons/opencart-integration
https://www.fynsis.com/suitecrm-opencart-integration/