By Jenny Mills · rural nurse & homesteader · health, safety, law and the paperwork of going bush
“After my third solar-powered server crash during a heatwave, I learned that rural homesteads need at least 20% more battery capacity than the datasheets claim.”
Hosting your own website off-grid is simpler than it sounds. A budget solar kit, a low-draw server and sensible power budgeting will keep your site live without the grid. Here's the exact setup we run on our Aussie homestead, including what it costs and where people go wrong.
Look, if you're living off-grid in Australia and want a website that doesn't die when the grid goes down, you need a solar-powered server. No bullshit. Here's how to do it right.
A homestead that's already running an off-grid solar system has most of what it needs to host a small website. The remaining piece is a tiny, low-power computer and a modest solar add-on. This article covers the core spec, the load maths, the component choices, and the safety boundaries you don't cross without a sparkie.
In the Australian context, an off-grid setup is a home that's completely disconnected from the electricity network — no retailer, no fallback, and no automatic top-up when the batteries sag. With an off-grid solar system, you are entirely independent of the grid and 100% responsible for your power needs. That's the trade: autonomy on one side, full responsibility for sizing, storage, and maintenance on the other.
The standard component stack for an off-grid power system: generation assets (solar, sometimes wind or hydro), battery storage, inverters, a backup generator, and load management. Off-grid renewable energy data across solar, hydro, bioenergy, and wind has been tracked in Australia across 2015 to 2024, so there's a mature ecosystem of components to draw from.
If you still have the grid as a backup and just want to lean on solar most of the time, that's a hybrid system, not off-grid. Hybrid systems allow the grid to remain as a fallback while running primarily on own generation and battery power. Worth noting because the hosting setup differs slightly — a hybrid site can ride through short outages, while a true off-grid site cannot afford to be careless with watts.
A static website served by a Raspberry Pi 4 is the de facto low-power off-grid server. Static site hosting reduces server load compared to dynamic sites — no database queries, no PHP workers chewing cycles, just files served from disk. CDN caching can reduce uplink load for off-grid sites, which matters when your uplink is a 4G modem on a limited data plan.
In my experience, these systems are happiest when the website is genuinely static or pre-rendered. Anything that demands constant back-end computation will eat the energy budget the solar panel is sized for.
An indicative off-grid website hosting setup in Australia costs approximately $595–$645 using the components below. Prices in AUD.
| Component | Specification | Role |
|---|---|---|
| Computer | Raspberry Pi 4 | Server (5–10 Wh/day) |
| Solar panel | 10 W | Generation (~40–50 Wh/day in most of Australia) |
| Battery | 12 V 50 Ah deep cycle | Storage |
| Charge controller | 10 A | Panel-to-battery regulation |
| Misc. | Wiring, fuse, enclosure, SD card | Integration and protection |
These four items form the core. Everything else is mounting hardware and weatherproofing.
A 10 W panel in most of Australia produces approximately 40–50 Wh/day. That's comfortably above the Pi's 5–10 Wh/day draw, which leaves headroom for the charge controller quiescent draw, any router or 4G modem on the same battery, and several overcast days back-to-back. Solar panels should be cleaned every 3 months as dirt reduces efficiency — relevant here because a 10 W panel has very little spare output to begin with.
For sizing the wider system, the rule of thumb for any off-grid install is to size for the worst week of winter, not the best week of spring, and integrate a generator for extended low-solar periods. A hosting rig is small enough that a generator is overkill, but the principle still applies: assume the worst week, not the best day.
Off-grid solar systems use deep cycle batteries, typically sized for one night of energy usage with daytime solar recharge. For a hosting rig, a 12 V 50 Ah battery is the common pick because it gives multiple days of autonomy for a 5–10 Wh load. Storage for off-grid systems should be sized for days of autonomy rather than marketing claims — count the actual daily Wh draw and divide into the usable battery capacity (about 50% for lead-acid, more for lithium).
Off-grid deep cycle batteries typically need replacement every 3–5 years. Budget for that. Battery voltage should be checked monthly; a reading below 12 V on a 12 V system indicates critically low charge and means the panel isn't keeping up with load or the battery is failing.
MPPT charge controllers allow standard, mass-produced solar panels to be used in off-grid applications. For a 10 W panel into a 12 V battery, a 10 A PWM or MPPT controller is sufficient. The important point is that off-grid solar installations should use components specifically rated for off-grid use. Most grid-tie inverters are not configured to connect to a battery bank, so don't be tempted to repurpose a string inverter from a rooftop array — it won't manage the battery.
| Parameter | Value | Notes |
|---|---|---|
| Daily load (Pi 4, static site) | 5–10 Wh | Roughly 0.5 A at 5 V, 24 h |
| Daily yield (10 W panel, AU) | 40–50 Wh | 4–5 peak sun hours equivalent |
| Battery | 12 V 50 Ah (~600 Wh) | 50% DoD = 300 Wh usable (lead-acid) |
| Days of autonomy | 30–60 days (theoretical) | Real figure is 5–10 days with realistic inefficiencies |
| Battery replacement | 3–5 years | Plan for it |
The energy balance works comfortably. The bottleneck is weather: a week of heavy cloud over Beecher in summer is survivable; the same week in winter is the real test.
If you scale up the array later, the format matters. 60-cell and 120-cell solar panels are approximately 1.07 m by 1.68 m; 72-cell and 144-cell panels are approximately 1.07 m by 1.98 m. The 120-cell and 144-cell panels use half-cut cells, which are slightly more efficient and resistant to failure. For a hosting rig none of this is relevant — a 10 W panel is far smaller than any of these — but it matters the moment you try to host something more demanding.
Monocrystalline solar panels are slightly more efficient than polycrystalline panels but cost more. For a 10 W build the difference is a few dollars and not worth worrying about.
This setup is 12 V DC at low current. That makes it one of the few off-grid projects a competent DIYer can complete without a sparkie — but the line is clear.
A hosting rig is small enough that the maintenance is light, but it isn't zero.
Can I host a dynamic site (WordPress, Ghost, etc.) on this setup?
Technically yes, but the load jumps from 5–10 Wh/day into the tens of Wh range, and database writes chew SD card life. Static site hosting reduces server load compared to dynamic sites, and on an off-grid rig that difference is the difference between a 10 W panel working and not working.
Do I need a generator?
For a Pi-class load, no. A 10 W panel and 50 Ah battery will ride out most weather. If you scale to a full home off-grid system, off-grid systems should be sized for the worst week of winter, not the best week of spring, and integrate a generator for extended low-solar periods.
What about a CDN?
CDN caching can reduce uplink load for off-grid sites. If your site gets any meaningful traffic, putting Cloudflare or a similar cache in front cuts the bytes leaving the homestead dramatically.
Why not just use a VPS and skip all this?
Then you're not off-grid for hosting — you're hosted in a data centre somewhere. The whole point of this build is that the site lives on the property, runs on your own power, and keeps serving when the NBN goes down or the data centre has a bad day.
How long will the battery last on a dark, rainy week?
Realistically about 5–10 days for a Pi-class load on a 50 Ah battery, accounting for inefficiency and partial depth of discharge. If you're getting week-long weather events, oversize the battery or add a second panel.
Can I run a 4G modem off the same battery?
Yes — a typical 4G modem draws 5–15 W depending on idle/active. Add that to the load budget before sizing.
Worth a watch: Cheap & Simple Off Grid Tiny Home Solar Setup - Anyone Can Do This! · The Solar Lab