solar panel: grade A, 25years life time, 10years warranty, 15years 90% 25years 80% efficiency
battery life time: AGM 5-7years, GEL 7-10years, adopt ABS durable shell, in special green color.
controller: PWM technology. (MPPT optional)
inverter: pure sine wave, low frequency design, with isolated transformer inside. could add AC input function for back-up when no sun.