Cerbo GX setup guide for overlanders — VRM remote monitoring explained
This comes up constantly so let me give you the detailed breakdown based on real-world experience in Polokwane.
The technology: The SA market has matured significantly in the last 3 years thanks to loadshedding forcing everyone to learn about batteries, inverters, and solar. The knowledge in this community is genuinely world-class now — South Africans know more about off-grid power than most countries because we had to.
Pricing in SA (2025): R14,000 depending on brand and supplier. Get at least 3 quotes — pricing varies significantly between installers and online suppliers.
My setup: 153Ah LiFePO4 battery, 293W solar panel, Victron SmartSolar MPPT 75/15 controller, and a Redarc BCDC1225D for DC-DC charging from the alternator. Total investment: R29,000 all-in. It powers a National Luna 40L fridge 24/7 and runs LED lights, phone charging, and a 12V air compressor without any issues.
Common mistakes to avoid: Undersized cables — voltage drop kills efficiency. Use the wire sizing calculators available online.
Happy to share my wiring diagram or go into more detail on any component. This stuff seems complicated but it really is not once you understand the basics.
5 Replies
On the alternator damage question — it is a real risk with large lithium banks if you do not manage the charge rate. A DC-DC charger (Redarc BCDC or Victron Orion) limits the current drawn from the alternator to a safe level. This is not optional if you have more than 100Ah of lithium connected to your starting circuit.
Freedom Won vs Hubble vs BSL — I have owned Freedom Won for 24 months and it has been excellent. The BMS is conservative (some say too conservative) but it means you never accidentally overcharge. The 10-year warranty is genuine — they replaced a cell in my pack under warranty without questions.
— jan_van_zyl
Freedom Won vs Hubble vs BSL — I have owned Freedom Won for 29 months and it has been excellent. The BMS is conservative (some say too conservative) but it means you never accidentally overcharge. The 10-year warranty is genuine — they replaced a cell in my pack under warranty without questions.
This comes up constantly so let me give you the detailed breakdown based on real-world experience in Polokwane.
The technology: The SA market has matured significantly in the last 3 years thanks to loadshedding forcing everyone to learn about batteries, inverters, and solar. The knowledge in this community is genuinely world-class now — South Africans know more about off-grid power than most countries because we had to.
Pricing in SA (2025): R14,000 depending on brand and supplier. Get at least 3 quotes — pricing varies significantly between installers and online suppliers.
My setup: 153Ah LiFePO4 battery, 293W solar panel, Victron SmartSolar MPPT 75/15 controller, and a Redarc BCDC1225D for DC-DC charging from the alternator. Total investment: R29,000 all-in. It powers a National Luna 40L fridge 24/7 and runs LED lights, phone charging, and a 12V air compressor without any issues.
Common mistakes to avoid: Undersized cables — voltage drop kills efficiency. Use the wire sizing calculators available online.
Happy to share my wiring diagram or go into more detail on any component. This stuff seems complicated but it really is not once you understand the basics.
— hannes_strydom
Good breakdown. On the DVCC settings — this is the single most important thing to get right with Victron and LiFePO4. Set your charge voltage limit to 14.2V maximum. I missed this initially and pushed my batteries to 14.6V repeatedly. They still work but I know I have shortened their lifespan.
Freedom Won vs Hubble vs BSL — I have owned Freedom Won for 24 months and it has been excellent. The BMS is conservative (some say too conservative) but it means you never accidentally overcharge. The 10-year warranty is genuine — they replaced a cell in my pack under warranty without questions.
Freedom Won vs Hubble vs BSL — I have owned Freedom Won for 29 months and it has been excellent. The BMS is conservative (some say too conservative) but it means you never accidentally overcharge. The 10-year warranty is genuine — they replaced a cell in my pack under warranty without questions.