Autonomous wifi bridge
Power needs estimation
- 2 Ubiquiti Nano LocoM5 24v, 5,5W each, so approx 12W
- 1 Ubiquiti ToughSwitch 5PoE 24v, 2,5W, so approx 3W
- TOTAL => 15w under 24v
The estimation is voluntary "high". If we assume that the setup is used 24 hours a day at 100% of its capacity, it means 15*24=360Wh per day. We're not rich, so we assume that we will get lead-acid batteries. Because of the low yield of lead-acid batteries (10%), the capacity of the battery must be at least 150Ah. Finally, the solar panel have to produce at least 360Wh per day (this value depends of its size,yield, and the sun exposition). The maximum debited current from the batteries is 24/15 = 1.1A.
The setup has to be robust, with low temperature and humidity. So we have to take great hardware. The MPPT 100/15 seems to be great, it can take 400w under 24v solar panels.