Hi @BoRRoZ,
PV panel is 12V and 160watts.
Inside box is:
- Victron Energy 12V PV MPPT controller.
- Victron Energy LoRaWAN monitor, goes via TTN to Victron Energy web portal.
- 12V 100Ah GEL deep-cycle battery.
- DC distribution and fuse panel.
The LoRaWAN TTN base station and Mikrotik backhaul (this topic is about Mikrotik!) together consume a constant load of about 0.5amps = 6watts.
Plenty of power for 8 months of year but marginal in North of Scotland during Nov/Dec/Jan/Feb due to periodic low-pressure weather systems leading to 5-7 days with zero sunshine. I will add a second battery to take capacity to 200Ah before next winter. The box has space for up to 300Ah of battery capacity.
The Victron Energy controller cuts the power-supply to the load if the battery voltage falls below 11.2V to protect everything so actual available stored power is more like 80Ah. Power is restored when battery voltage rises past 12.6V. This recent winter saw 3 outages totalling about 5 days.