Weighing kit with load cells designed to transform any hospital bed in bed scale. This new version has three innovative characteristics: - it is equipped with a wireless system; - it is powered by solar panels to increase their autonomy; - immediate installation without the use of jacks or tools that raise the bed. The weighing system consists of 4 load cells and is completely made in AISI304 stainless steel and aluminum. Each estensimetric load cell, has a capacity of 150 kg with 100% overload. The device has a digital display of the weight. Keyboard push button type membrane-protected polycarbonate. The system has a software that made out the control of the weight loss (accessory AC26).