Off-grid sauna and chiller power integration in Africa

In most of our markets the grid is a backup rather than the supply. Heater and chiller are simply two big loads, and the job is fitting them into the inverter, battery, solar and generator system the property already runs.

Indicative across Africa: USD 1 500 – 5 500, supplied and installed. Local currency on each country page.

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Off-grid sauna and chiller power integration in Africa

What each load asks of your system

Load	Size	How it behaves	How we connect it
Sauna heater, 2–4 person	4.5–9 kW	Steady resistive draw; most of an hour at full power to heat up	Timed circuit, inside the solar window where there is one
Plunge chiller	1–4 HP	Small but around the clock; a surge at every compressor start	Backed-up circuit, soft starter, a lid to carry the night
Infrared cabin	1.5–2.5 kW	Light and plug-in	Usually no system work at all

The heater is the big, short load and the chiller the small, long one. Treating them as the same kind of appliance is where most sauna installations on inverters go wrong.

Timers, interlocks and starting order

We give the heater a timed circuit so it runs while the array is producing, or on the generator when the owner deliberately chooses it. The chiller is held off while the cabin warms and released afterwards, and a hardware interlock stops the two from starting within seconds of each other. Where the supply is soft, the compressor gets a soft starter.

On a generator, starting order matters more than size: a set that carries each load comfortably in turn can trip when both kick in together, and the controls make that combination impossible.

Checking the changeover, physically

Before anything is designed we trace which circuits the changeover really feeds, by testing rather than by reading the labels. A plunge wired to the unbacked side is a common find — it warms up in every outage and the owner blames the chiller. Once found, moving it is small work for your electrician.

Camps, inverter houses and islands

At a bush camp the whole spa lives on solar, batteries and a generator; the lodge and camp spa page shows how the plunge is sized to the water budget as well. In Lagos and Abuja it is an inverter and a generator behind an unreliable grid, covered country by country on the Nigerian off-grid power page. In Johannesburg and Cape Town it is the inverter and battery base the country installed during load shedding — see backup power in South Africa.

Where a system honestly cannot carry a full sauna, an infrared cabin at 1.5–2.5 kW nearly always can. The long read, with sourced Nigerian and South African grid figures, is wellness rooms where the grid is not the supply.

What you receive, and who does the wiring

Two figures worked out from your own system: the cost of one sauna session and the chiller's monthly consumption. And a one-page load schedule for your electrician: peak draw, duty cycle, which circuit carries each load and which pairs may never start together.

Wiring and any inverter or battery upgrade belong to a licensed electrician, who signs for them; we supply the figures and check the result at commissioning. Send a photo of your inverter nameplate, battery bank and generator on WhatsApp, and we will tell you what they can realistically carry.

In short

Heater and chiller interlocked so they never start together
Heater switched on in the sunny hours wherever there is solar
Backed-up circuits traced and tested, not assumed
Session cost and monthly chiller consumption worked out from your system

By country

Power & off-grid integration: what it costs where

Power and integration work, by country:

South Africa — Backup powerZAR 12k – 78k

Nigeria — Power & invertersNGN 2.5M – 11M

Elsewhere this work sits inside the chiller and plant page, and at camps inside the lodge page. Ask us and we will price it separately: Morocco · Egypt · Mauritius · Kenya · Tanzania · Seychelles

Questions

Power & off-grid integration: what we are asked

Will a 10 kVA inverter run a sauna?

Often, for a compact cabin on a timed circuit — we confirm it against your real battery capacity first.

Will you upsize my inverter or batteries?

That job belongs to your electrician. We hand over the load figures so it can be priced properly.

Is a sauna expensive to run off-grid?

Less than most people expect when the heater runs in the sunny hours. The chiller is the constant cost, and we put a figure on it before you commit.

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