Water heating

Should I keep an LPG gas geyser when I add solar in South Africa?

Sometimes yes — a small LPG (or dual) geyser can cover Stage-morning showers without burning battery kWh, while PV or a heat pump handles the bulk of daytime heating. It is a lifestyle and safety design choice, not a moral failing. Price cylinder logistics and CO ventilation honestly.

Updated 27 October 2026 · Illustrative ranges — not a formal quote, credit decision or legal advice.

Answer first: Decide whether hot water during Stage is worth battery kWh. If not, keep or install a modest LPG unit for mornings and let timers / heat pumps / PV diversion do the heavy lifting. Pair with water heating hub · geyser on backup · add heat pump · ripple / load control.

When LPG still earns its keep

Long Stage mornings before PV wakes up.
Small battery sized for lights/fridge/router only.
Holiday homes that sit cold for weeks — holiday home.
Estate rules that complicate big electrical upgrades.

When to drop LPG

Signal	Lean electric
Heat pump already sized for the house	Yes — fewer fuel runs
Large battery + reliable midday PV	Often yes
No safe flue / ventilation path	Do not force LPG indoors
Cylinder delivery unreliable	Electric path with sober Stage rules

Safety and compliance

Gas work needs the right registered practitioner; CO and ventilation are non-negotiable. Solar CoC and gas certificates are different documents — keep both — solar CoC · insurance.

Rand sketch

Avoiding a 3 kW element on a 2.5 h Stage saves ~7.5 kWh of battery. At 350–470 c opportunity cost that is roughly R26–R35 plus Stage optionality for lights and fibre. A few LPG kilograms a month can be cheaper than another 5 kWh module bought only for showers — compare on your quote — 10 kWh cost · Stage 4.

Control map with ripple and timers

If an electric element remains in the system, coordinate municipal ripple, smart timers and hybrid diversion so they do not fight — ripple · smart geyser. Related: induction hob · install order.

Homeowner folder to keep with the CoC

Store quote annexures, OEM manuals, serial photos, export-limit screenshots and metro reference letters together — choose installer · selling with solar · warranty transfer.

Re-check fixed charges after meter changes — fixed charges · 2026/27 tariffs · metro tariffs · bill still high.

Field notes from SA handovers

Demand a live demo, NRS-listed SKUs matching the invoice, and photos of settings — red flags · NRS list · SSEG · read a quote.

Where this sits on the desk

See Answers, metro tariffs, batteries, panels & inverters, and check a quote.

Worked homeowner checklist

Photograph board labels, nameplates and meter face.
Save the live metro or OEM PDF behind any rand claim.
Book a Stage simulation where backup matters.
Diary a 30-day monitoring review against the first bill.

Questions for every installer WhatsApp

Which primary PDF backs that claim?
Who registers warranties and by when?
What if the first SSEG pack is rejected?
Can you show a recent labelled board photo from a similar job?

Commissioning photo habit

Before the scaffolding leaves, photograph serials, board labels, clamp rows, isolator positions, app settings and the meter face. Store them with the CoC. Future claims, resale and fault-finding all go faster with that pack — CoC · selling with solar · warranty transfer · battery claims.

Tariff July reminder

Every municipal July (and Eskom’s own updates) can move your payback napkin. Rebuild savings with the live tariff code, fixed charges and a realistic self-use fraction — not last year’s PDF — 2026/27 tariffs · fixed charges · metro tariffs · monthly savings.

Stage etiquette for hungry loads

Geysers, ovens, pool pumps and wallboxes should not surprise the essentials board. Write shed rules into the handover and test them once — essentials · Stage strategy · Stage 4 · overload lessons.

NRS list and export honesty

Invoice SKUs must match the live NRS-listed inverter set for your SSEG path. Export promises that ignore metro caps create failed inspections — NRS list · SSEG · export limit · zero-export · NRS 097.

Monitoring that survives cloud outages

Export monthly production CSVs and keep bill scans offline. Portals change URLs; your payback model should not — monitoring numbers · dongle offline · bill still high · read a bill.

Commissioning photo habit

Tariff July reminder

Stage etiquette for hungry loads

NRS list and export honesty

Monitoring that survives cloud outages

Export monthly production CSVs and keep bill scans offline. Portals change URLs; your payback model should not — monitoring numbers · dongle offline · bill still high · read a bill.

SA context that sales decks skip

Municipal paperwork, Stage behaviour and fixed charges decide whether a clever hardware idea actually saves rand. Build the quote around your last 12 months of kWh, the live tariff code, and a written essentials list for Stage 4–6. Then layer the topic on this page on top — not the other way around — size a system · metro tariffs · read a quote · fixed charges · essentials.

Red flags that waste a Saturday

Cash-only deposits without a company invoice matching NRS SKUs.
“Guaranteed SSEG in seven days” with no metro PDF cited.
Export income modelled at 1:1 against your import rate.
No CoC, no dual-supply labels, no SPD line items.
Firmware “we’ll hack later” promises.

Walk away early — red flags · NRS list · CoC · dual-supply labels · SPD.

Aftercare that protects the asset

Diary firmware updates, cleaning dates, and any earth-leakage or isolation alarms. Keep the distributor claim path phone number next to the serial photo. When something fails in year four, that boring admin is the difference between a swap and a shrug — firmware · inverter claims · battery claims · yearly maintenance.

Morning shower protocol

Keep LPG for the 05:30–07:30 window when Stage often bites and PV is asleep. Let PV or a heat pump recover the tank after 09:00. Write that on a sticky note for house-sitters so nobody enables the electric element onto backup “just this once” — geyser on backup · Stage strategy · heat pump vs geyser.

Hybrid water-heating stack that works

Many homes keep LPG for cloudy weeks and use PV for a heat pump or smart geyser timer on sun hours. The win is diversity, not ripping out a working gas unit on day one — heat pump vs geyser · smart geyser · add heat pump.

Backup-board honesty

Do not put a large electric element on essentials "just in case" while also keeping LPG — that double-spend kills Stage runtime — geyser on backup · essentials.

Quick questions

Is LPG “anti-solar”?

No — it can protect a small battery for critical loads.

Can I run LPG and an electric element together?

Sometimes as dual systems — design changeover and safety; do not improvise.

What about induction cooking instead?

Different load — plan Stage watts separately from water heating.

Sources & related

Education only — not a quote, engineering design, credit offer or legal advice. Confirm every figure on the live primary (bank, metro, manufacturer, SARS) before you spend money.

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