Difference between revisions of "Autonomous wifi bridge"
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| − | == | + | == Schema/distances == |
| + | |||
| + | <pre>--------------- --------------- | ||
| + | | |-|| ||-| |-|| ||-| | | ||
| + | | | | | | | | ||
| + | | Location1 | | | | Location 2 | | ||
| + | | | | | | | | ||
| + | _______________ ___ _______________ | ||
| + | <-----------815m--------------> <-----763m---></pre> | ||
| + | |||
| + | Note: no osbtacles | ||
| + | |||
| + | || WiFi antenna | ||
== Power needs estimation == | == Power needs estimation == | ||
| − | * 2 Ubiquiti | + | * 2 Ubiquiti Nanostation LocoM 5 24v, 5,5W each, so approx 12W |
| − | * 1 Ubiquiti ToughSwitch 5PoE 24v, | + | * 1 Ubiquiti ToughSwitch 5PoE 24v, 1,5W |
| − | * TOTAL => | + | * TOTAL => So to have some margin, 15W |
The estimation is voluntary "high". | 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''' | + | If we assume that the setup is used 24 hours a day at 100% of its capacity, it means 15*24='''360Wh''' per dey. |
| − | per | + | The solar panel have to produce at least 360Wh per day. |
| − | + | The maximum debited current from the batteries to the WiFi installation is 15/24 = '''0.625'''. | |
| − | The maximum debited current from the batteries is 24 | ||
| − | == Solar | + | == Solar panel == |
At the Goutailloux, the solar power is 1,46kWh/m**2/d, so we can take large : 1,40. | At the Goutailloux, the solar power is 1,46kWh/m**2/d, so we can take large : 1,40. | ||
| − | If we take a 300Wc | + | If we take a 300Wc solar panel, the average power delivered a day is 300*1,4=420Wh per day, for the worst case (the december month). |
https://www.myshop-solaire.com/panneau-solaire-300w-mono-solarworld-_r_676_i_1560.html : 305€ | https://www.myshop-solaire.com/panneau-solaire-300w-mono-solarworld-_r_676_i_1560.html : 305€ | ||
| Line 27: | Line 38: | ||
== Battery setup == | == Battery setup == | ||
| + | === Lead/acid=== | ||
We want to have native 24v because we don't need DC/DC converter for the PoE. We can take 4 batteries of 80Ah each. | We want to have native 24v because we don't need DC/DC converter for the PoE. We can take 4 batteries of 80Ah each. | ||
| − | We can assemble 2 batteries in series to make a pack of 24v/80Ah, then do the same with the 2 others. Finally, we can assemble this 2 packs in parallel to obtain 24v/160Ah. | + | We can assemble 2 batteries in series to make a pack of 24v/80Ah, then do the same with the 2 others. Finally, we can assemble this 2 packs (connected in series) in parallel to obtain 24v/160Ah. |
| − | We | + | |
| + | === AGM === | ||
| + | |||
| + | The adopted choice is to have 2 AGM batteries of 25Ah in series. We will have to use this battery at 60%, so approximately 700 cycles, which is sufficient. | ||
| + | |||
| + | https://www.myshop-solaire.com/batterie-agm-12v-25ah-super-cycle-victron-energy-_r_572_i_1994.html | ||
| + | |||
| + | These batteries are not so expansive and seems to fit our needs. | ||
== WiFi relay prices == | == WiFi relay prices == | ||
| − | + | WiFi antennas will be loan. | |
| − | + | == Docs == | |
| − | + | * https://www.myshop-solaire.com/quel-regulateur-solaire-choisir-pwm-ou-mppt--_r_80_a_183.html | |
| + | * https://ragedecamp.eu.org/ | ||
| + | * https://www.ffdn.org/wiki/doku.php?id=formations:wifi | ||
| + | * https://www.ffdn.org/wiki/doku.php?id=memo_wifi_ubiquiti | ||
| + | * https://www.ffdn.org/wiki/doku.php?id=documentation:wifi_federes | ||
| − | + | == What do we need == | |
| − | + | ||
| + | We can buy some stuff, but we would like to recover as mush as possible from motivated people :) | ||
Latest revision as of 16:26, 29 July 2018
Contents
Schema/distances
--------------- ---------------
| |-|| ||-| |-|| ||-| |
| | | | | |
| Location1 | | | | Location 2 |
| | | | | |
_______________ ___ _______________
<-----------815m--------------> <-----763m--->
Note: no osbtacles
|| WiFi antenna
Power needs estimation
- 2 Ubiquiti Nanostation LocoM 5 24v, 5,5W each, so approx 12W
- 1 Ubiquiti ToughSwitch 5PoE 24v, 1,5W
- TOTAL => So to have some margin, 15W
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 dey. The solar panel have to produce at least 360Wh per day. The maximum debited current from the batteries to the WiFi installation is 15/24 = 0.625.
Solar panel
At the Goutailloux, the solar power is 1,46kWh/m**2/d, so we can take large : 1,40. If we take a 300Wc solar panel, the average power delivered a day is 300*1,4=420Wh per day, for the worst case (the december month). https://www.myshop-solaire.com/panneau-solaire-300w-mono-solarworld-_r_676_i_1560.html : 305€
Regulator
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. https://www.myshop-solaire.com/regulateur-solaire-victron-energy-mppt-75-15a-_r_370_i_10.html : 91.80€
Battery setup
Lead/acid
We want to have native 24v because we don't need DC/DC converter for the PoE. We can take 4 batteries of 80Ah each. We can assemble 2 batteries in series to make a pack of 24v/80Ah, then do the same with the 2 others. Finally, we can assemble this 2 packs (connected in series) in parallel to obtain 24v/160Ah.
AGM
The adopted choice is to have 2 AGM batteries of 25Ah in series. We will have to use this battery at 60%, so approximately 700 cycles, which is sufficient.
https://www.myshop-solaire.com/batterie-agm-12v-25ah-super-cycle-victron-energy-_r_572_i_1994.html
These batteries are not so expansive and seems to fit our needs.
WiFi relay prices
WiFi antennas will be loan.
Docs
- https://www.myshop-solaire.com/quel-regulateur-solaire-choisir-pwm-ou-mppt--_r_80_a_183.html
- https://ragedecamp.eu.org/
- https://www.ffdn.org/wiki/doku.php?id=formations:wifi
- https://www.ffdn.org/wiki/doku.php?id=memo_wifi_ubiquiti
- https://www.ffdn.org/wiki/doku.php?id=documentation:wifi_federes
What do we need
We can buy some stuff, but we would like to recover as mush as possible from motivated people :)
