What is the maximum PSN wallet balance?

The maximum PSN wallet balance is $250 USD (or the equivalent in your local currency — for example £200 in the UK or €200 in Europe). If redeeming a voucher code would push your balance over this limit, the redemption will fail with error WC-40377-1. You need to spend some of your existing balance first before the new code can be added. PSN wallet codes cannot be partially redeemed.