APC UPS Battery Backup & Surge Protector with AVR, 1500VA, APC Back-UPS Pro (BX1500M) https://www.amazon.com/dp/B06VY6FXMM/ref=cm_sw_r_cp_api_i_p4QKDbB5K234R
Depending on the load and time needed to survive I sometimes add an external battery pack.
APC Back-UPS Pro 1500VA UPS External Battery Backup for Model BR1500G (BR248PG) https://www.amazon.com/dp/B0047E5B90/ref=cm_sw_r_cp_api_i_35QKDb1GC90FZ