The equalisation levy would bring the solar equipment manufacturers in SEZs at par with those in the domestic tariff area (DTA) which have not got the tax and other incentives received by the former, the companies said in a statement.
The companies, which include RenewSys, Webel Soar and Vikram Solar, have units located in SEZs.
"There was an apprehension that manufacturing units located in SEZ have availed certain benefits in past hence if the BCD is not levied while clearing the products from SEZ to DTA, it will put manufacturing units located in DTA at cost disadvantage," Vikram Solar's Chief Executive Office Saibaba Vutukuri said in the statement.