Growatt inverter 2-year reliability review — real South African owner experience
This comes up constantly so let me give you the detailed breakdown based on real-world experience in East London.
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): R11,000 depending on brand and supplier. Get at least 3 quotes — pricing varies significantly between installers and online suppliers.
My setup: 145Ah LiFePO4 battery, 304W solar panel, Victron SmartSolar MPPT 100/20 controller, and a Redarc BCDC1225D for DC-DC charging from the alternator. Total investment: R25,000 all-in. It powers a Dometic CFX3 45 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.
4 Replies
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.
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.
What MPPT controller are you using? I am running a Victron SmartSolar 100/20 and it has been faultless. The Bluetooth monitoring via the VictronConnect app means I can see exactly what the panels are producing and what the batteries are doing in real time. No more guessing.
The Eskom situation is interesting. My view: the 224 loadshedding-free days is excellent progress but I am not dismantling my solar system. Load reduction on overloaded feeders will continue regardless of Eskom's generation performance. And a home battery system has value beyond loadshedding — cheaper overnight electricity from time-of-use tariffs, backup during faults, and off-grid capability when you need it.