Free piston linear generator for low grid power generation Izzeldin Abdalla, Ezrann Z. Zainal A., Nur Amalina Ramlan, Firmansyah, Abd. Rashid A. Aziz and Morgan Heikal MATEC Web Conf., 131 (2017) 02007 Published online: 25 October 2017 DOI: 10.1051/matecconf/201713102007