Greetings from the Czech Republic. I am new to solar and need some advice. In the garage where there is no electricity, I now have this system: 150W solar panel, BlueSolar MPPT 75/10, AGM battery 120Ah and Venus OS running on Raspberry Pi4. Everything works great, except for the battery, only the voltage is displayed on the VRM portal. Is there a simple way to get information about percentages and current in amperes? Thank you all and have a nice day.
You will need a battery monitor such as a Victron SmartShunt connected to your battery and Pi4.
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Thank you very much. I don’t need that much anymore 
SmartShunt 300A here costs around 110USD and another VE.direct cable 35USD. I can do without these data. 
But thanks for your answer anyway.