Upgrades
Can I add a battery to my existing solar system in South Africa?
Yes in many cases — but it depends on your inverter. Hybrid inverters (e.g. Sunsynk, Deye, GoodWe, Victron) can often add storage with compatible packs. Older string/grid-tied-only inverters usually need a hybrid replacement or a separate battery inverter. Budget roughly R25 000–R60 000+ for a typical 5–15 kWh add-on, then confirm compatibility on site.
Compatibility checklist
- Is the existing inverter hybrid-capable with free battery ports?
- Does the proposed battery brand talk to that inverter’s BMS protocol?
- Will backup circuits be added or re-balanced?
- Does the upgrade trigger a new SSEG / commissioning report at your municipality?
When a full inverter swap is smarter
Pre-2020 string-only systems, non-compliant off-grid boxes, or undersized backup ratings often cost less long-term if you replace the inverter while adding storage — especially if you also want EV-ready capacity.
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