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A 5BA lattice with an emittance of 200 pm*rad at 3 GeV and a circumference of 268.8 m is under design for ALBA-II. The injection is performed off-axis in a straight section only 4.7 m long with a single non-linear kicker needing a horizontal dynamic aperture larger than 6 mm. An optics of the injection section with asymmetric waists of the beta functions, low horizontal beta at the septum location and high beta at the kicker, has proved to perform better than a high beta section. This arrangement in the injection sections allows tuning equal phase advances and chromatic functions in all the cells and recover a pseudo 16-fold symmetric ring both on- and off-energy. The robustness of this solution in presence of errors has improved the injection efficiency with errors from 70% to 99%, keeping the dynamic aperture larger than 7 mm and the same lifetime still limited by the large tune shift with energy. The magnetic design along with the performances of the lattice with errors and the injection process are presented in this paper.
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