As a rule, the surrender value is generally more for single premium plans where the entire premium for the policy is paid at the beginning of the policy period. (policybazaar.com)
However, in case of single premium plan, you have already paid premium for all the years. (personalfinanceplan.in)
This is non participating single premium plan which offers assured guaranteed returns along with life cover to nominee after your death. (myinvestmentideas.com)