Thanks, but a type B RCD , that can detect 30mA imbalance, and >6mA DC, is way more than £30
Type B RCD / RCCB 40A for EV Charge Point Installations. 2 pole, single phase, 30ma. 40 Amp
Type B RCD for EV charge point installations to meet latest 18th edition wiring regulations. 40A, 30ma. 2 pole (1p + N) for Single Phase installations, 54mm in width (takes up 3 standard slots/ways in a consumer unit) Rated for up to 40A, Breaking point 10kva AC and DC leakage protection, see...
shop.evchargersdirect.co.uk