Hi Guys,
I`m a newbie and I would like to operate a solar powered LoRaWAN station.
I already know this article:
My question is, is there a solution to use the TTIG with 4G or 5G connection?
If not, which gateway can you recommend with a low power consumption and a 4G/5G connection? (5G is not a must have, but it would be nice)
Is the “Dragino LG308 Indoor”-gateway a good one for my requirements?
The DLOS8 with 4G would be a better fit. Outdoor gateway and 4G 
BTW, did you notice the search option for this forum? There have been numerous discussions regarding solar powered gateways already.
…and posts of power use estimates/rough tests for various GW’s allowing eval for Solar deployments…
Have done with Laird RG186 (rehoused for ODU), TTIG’s, RPi/RAK units etc…though not 308’s - as SX1301 based likely similar order of consumption as a RG186? Many more, reasonable low cost ODU’s - such as the DLOS8 called out, now available in the market c/w years previous
Forum Search is your friend 
Newer SX1302/03 based devices tend to be lower power and more Solar friendly