Hardware
How much Wi-Fi coverage does a solar inverter dongle need in South Africa?
Hybrid dongles need a stable 2.4 GHz (usually) signal at the inverter — metal garages, distant fibre routers and load-shedding router reboots are the top “plant offline” causes, not dead inverters. Design coverage at survey time.
Updated 27 October 2026 · Illustrative ranges — not a formal quote, credit decision or legal advice.
Answer first: Stand at the inverter with a phone Wi-Fi meter during the survey. If bars are weak, budget a mesh node, Ethernet bridge, or OEM LAN stick — dongle offline · monitoring · fibre on backup · garage placement.
Failure modes
| Symptom | Likely cause |
|---|---|
| Offline every Stage | Router on non-essential board |
| Offline in garage only | Metal shielding / distance |
| App OK, portal empty | Cloud/account — still verify local display |
| Random drops at noon | Heat + marginal RSSI |
Design fixes
- Put fibre/router on essentials with the hybrid.
- Use OEM-supported LAN where Wi-Fi is hopeless.
- Export CSVs monthly so cloud outages do not erase history.
Related: fan noise / placement · CCTV backup · NAS backup.
SA desk notes that keep quotes honest
Ask every partner for Incl. VAT line items, NRS-listed SKUs where relevant, and who owns metro paperwork after deposit. Compare at least two written scopes before you pay — read a quote · choose installer · NRS list · SSEG.
Worked homeowner checklist
- Photograph the DB, roof and meter before the survey.
- Export twelve months of kWh or summer+winter bills.
- Write Stage priorities (fridge, routers, lights) before shopping kWh.
- File CoC, warranties and SSEG refs in one folder after handover.
Related hubs: load shedding · metro tariffs · costs & savings · check a quote.
Tariff and fixed-charge reminder
Self-use savings sit on top of fixed charges that do not disappear. Model both before you celebrate a payback slide — fixed charges · monthly savings · export vs self-use · tariffs 2026.
Safety and paperwork close
- No DIY on dual-supply boards or MC4 strings.
- Keep dual-supply labels readable for inspectors.
- Register warranties before the deadline printed on the pack.
More: CoC · inspector tips · warranties · DIY risks · red flags.
Monitoring and aftercare
Watch daily kWh, backup SoC before forecast Stages, and any new earth-leakage or isolation alarms. Export CSVs monthly so cloud portal changes do not erase your history — monitoring numbers · Wi-Fi dongle · SoC settings.
When to call vs when to wait
Call for burning smells, repeated RCD trips, zero production in full sun with isolators on, or firmware prompts you do not understand. Wait-and-log for single Stage-restore blips that do not repeat — fault codes · nuisance trips · MC4.
Inverter Wi-Fi needs a measured signal — not a hope
Plant rooms in far corners drop below usable RSSI for stick dongles. Measure signal at the inverter before commissioning ends; add a dedicated AP or Ethernet dongle when RSSI is weak. Monitoring that works on the installer’s hotspot only is not delivered.
Document the AP name and password location in the handover pack.
Sources homeowners should open themselves
Open the live metro SSEG page, the OEM manual for your SKU, and your tariff code before you argue with a quote. Primaries beat screenshots — metro tariffs · tariffs 2026 · NRS list · SSEG.
Quote comparison grid
| Line | Why it matters |
|---|---|
| Incl. VAT total | Ex-VAT shopping lies |
| SKU-level kit | Warranty and NRS match |
| DB / meter / SSEG owner | Who pays delays |
| Backup board schedule | Stage reality |
| Warranty deadlines | Paperwork that expires |
read a quote · check a quote · red flags · choose installer · PV GreenCard.
Stage-season operating rules
- Know essentials breakers before Stage 4.
- Follow written SoC policy — not 100% forever.
- After restore, check alarms before heavy loads.
- Keep dual-supply labels and OEM contacts on paper.
Stage strategy · Stage 4 · Stage 6 · SoC · load shedding hub · essentials · Stage table.
Aftercare calendar
- Month 1: monitoring app + CSV export.
- Month 3: roof/MC4 glance after storms.
- Month 6: bill vs production + fixed charges.
- Month 12: warranties, cleaning, SoC review.
yearly maintenance · monitoring · cleaning · MC4 · warranties · fixed charges.
Desk close — what to do this week
Photograph DB and roof, export twelve months of kWh, write Stage priorities, and request two Incl. VAT quotes naming SKUs, export mode, meter plan and SSEG ownership. File CoC, warranties and insurer acknowledgement together after handover — get quotes · check a quote · read a quote · SSEG · CoC · declare insurance · is solar worth it · payback · monthly savings · metro tariffs.
Related reading on this desk
Continue with solar during load shedding, do I need a battery, bi-directional meters, net metering vs net billing, export vs self-use, hybrid vs string, LiFePO4 vs NMC, usable kWh, NRS list, home solar guide, EV guide.
Site-survey tip: for wifi coverage inverter dongle sa, bring photos of the plant location, DB and meter, plus twelve months of kWh. Ask the partner to mark essentials on a printed board sketch before deposit — essentials · DB space · install timeline.
Commissioning evidence pack
Before sign-off, collect: serial photos, firmware version, export-limit screenshot, CT polarity photo, dual-supply label photos, CoC number, and the guest monitoring login. Store them with the invoice PDF. When a Stage-weekend fault appears three months later, that pack beats a WhatsApp scavenger hunt — CoC · export limit · CT clamps · labels · firmware · warranty claims.
Tariff and fixed-charge reminder
Self-use savings sit on top of fixed charges that do not disappear when panels go up. Model both before celebrating a payback slide — fixed charges · monthly savings · export vs self-use · tariffs 2026 · bill still high · metro tariffs · costs & savings.
Safety do-not list
- Do not DIY dual-supply boards or MC4 strings.
- Do not bridge RCDs to stop trips.
- Do not ignore isolation or earth-fault alarms.
- Do not disable export limits to "get more power."
DIY risks · earth leakage · MC4 · DC isolation · red flags · N-E island bond.
Extra SA context note 2
Keep metro and OEM PDFs beside this page. When rand bands disagree with a live primary, the primary wins. Revisit SoC and essentials after any Stage-calendar change — SoC · Stage strategy · Stage 4 · essentials · monitoring · choose installer · get quotes · check a quote.
Extra SA context note 2
Keep metro and OEM PDFs beside this page. When rand bands disagree with a live primary, the primary wins. Revisit SoC and essentials after any Stage-calendar change — SoC · Stage strategy · Stage 4 · essentials · monitoring · choose installer · get quotes · check a quote.
Extra SA context note 2
Keep metro and OEM PDFs beside this page. When rand bands disagree with a live primary, the primary wins. Revisit SoC and essentials after any Stage-calendar change — SoC · Stage strategy · Stage 4 · essentials · monitoring · choose installer · get quotes · check a quote.
Extra SA context note 2
Keep metro and OEM PDFs beside this page. When rand bands disagree with a live primary, the primary wins. Revisit SoC and essentials after any Stage-calendar change — SoC · Stage strategy · Stage 4 · essentials · monitoring · choose installer · get quotes · check a quote.
Extra SA context note 2
Keep metro and OEM PDFs beside this page. When rand bands disagree with a live primary, the primary wins. Revisit SoC and essentials after any Stage-calendar change — SoC · Stage strategy · Stage 4 · essentials · monitoring · choose installer · get quotes · check a quote.
Practical next steps this week
- Open the live metro SSEG/tariff PDF and tick what your quote already matches.
- Export one week of monitoring CSV so peaks and Stage windows are visible.
- Photograph the DB, labels and serials before any further work starts.
- Write three questions for the installer; do not accept shrug answers on CoC or export limits.
choose installer · read a quote · check a quote · get quotes · CoC.
How this ties to Stage and tariffs
Every hardware choice should survive your worst Stage cluster and your metro’s fixed charges. Self-use usually beats weak export credits — Stage strategy · fixed charges · export vs self-use · metro tariffs · tariffs 2026.
Handover questions for the installer
- Where is the guest monitoring login written down?
- What export limit and CT ratio appear on the commissioning sheet?
- Which circuits sit on essentials through Stage 4?
choose installer · export limit · CT ratio · essentials · check a quote.
Quick questions
Is 5 GHz required?
Most dongles prefer 2.4 GHz — check OEM.
Can I use any travel router?
Prefer OEM-supported bridges; random NAT tricks break apps.
Does offline mean zero production?
Check the local display first — connectivity ≠ generation.
Sources & related
- Solar News 24 — Wi-Fi dongle offline
- Solar News 24 — monitoring numbers
- Solar News 24 — fibre on backup
- Solar News 24 — garage placement