This document highlights the problem of incompatibility of connectors for DC-application in 
photovoltaic systems (DC connectors) produced by different manufacturers. It addresses four 
particular issues in that context: 
• background information on incompatibility of DC connectors from different manufacturers; 
• observations and challenges concerning the handling of DC connectors from different 
manufacturers; 
• stakeholders concerned by the incompatibility of DC connectors; 
• recommendations for long-term standardization and interim measures to address 
incompatibility of DC connectors.dition 1.0 2019-11 TECHNICAL REPORT Incompatibility of connectors for DC-application in photovoltaic systems IEC TR 63225:2019-11(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright ？ 2019 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying an