... of each pump < 200W . 11.Suitable power electrical heating:1 relay for 1500W(1500w-4000w must be use SR802)12.Inputs: 4 ... sensors,13.1pcs*Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC),14.3pcs*NTC10K, B3950 sensor (≤ 135oC ... ) for tank, (PVC cable ≤105oC),15.Outputs:2 relays, for circulation pumps or 3-way electromagnetic ...