Running a Bitcoin full node and a small local AI model off-grid in Canada requires roughly 200–600 W of solar panels and 500–2,000 Wh of battery storage — the exact range depends on your province’s peak sun hours, season, system load, and how many hours of autonomy you need. Use this calculator to get an indicative sizing range for your setup.
An always-on Bitcoin node combined with a local language model creates a genuinely sovereign compute stack — no cloud provider, no ISP dependency during grid outages, no data leaving your premises. Solar is the natural power complement: once installed, it has no recurring fuel cost and no utility dependency. But off-grid solar sizing has real engineering constraints. Under-spec the panels and your battery drains every winter morning; under-spec the battery and a single cloudy day kills your node.
This calculator applies the standard off-grid photovoltaic sizing methodology used by Natural Resources Canada in its Photovoltaic Systems guide, with peak sun hour (PSH) data drawn from the NRCan Photovoltaic Potential and Solar Resource Maps of Canada. All outputs are indicative estimates only — a qualified solar installer should verify sizing for any permanent installation.
Off-grid solar node sizing calculator
Enter your system load and location. The calculator produces a conservative and a typical sizing range — use the conservative figure for year-round reliability in harsh winters, and the typical figure for favourable or summer-only deployments. Outputs are indicative; actual system design requires a site survey.
How the solar sizing formulas work
Off-grid solar sizing is an energy balance problem. The goal is to ensure the panel array captures enough solar energy on the worst representative day (the “design month”) to meet the daily load, while the battery bank bridges the gap between sunset and the next day’s generation.
Step 1 — Daily energy load
Daily load (Wh/day) = System load (W) × Daily operating hours. A 55 W node running 24 hours consumes 1,320 Wh/day. This is the floor your solar array must replace each day.
Step 2 — Peak sun hours (PSH)
A peak sun hour is one hour of solar irradiance at exactly 1,000 W/m² — the standard test condition for panel ratings. If a location receives 2.0 PSH in winter, a 400 W (rated) panel produces 400 × 2.0 = 800 Wh on a representative winter day — before losses. PSH data for Canadian locations comes from Natural Resources Canada’s Photovoltaic Potential and Solar Resource Maps and the NRCan PVGIS tool.
Step 3 — System efficiency factor
Real solar systems lose energy between the panel and the load through charge controller conversion, battery round-trip losses, wiring resistance, and temperature derating. A well-designed LiFePO4 system achieves roughly 80% overall efficiency end-to-end; a conservatively derated figure is 70%. The formula is:
Panel capacity (W) = Daily load (Wh/day) ÷ (PSH × system efficiency) Conservative: Panel W = 1,320 ÷ (2.0 × 0.70) = 943 W Typical: Panel W = 1,320 ÷ (2.0 × 0.80) = 825 W
Source: Natural Resources Canada, Photovoltaic Systems (Cat. M92-131/2001E), section 4.2 — off-grid sizing methodology. The efficiency factor range (0.70–0.80) is consistent with IEC 61724 system performance characterization and common Canadian solar installation practice.
Step 4 — Battery autonomy sizing
Battery capacity (Wh) = System load (W) × Autonomy hours ÷ Depth of Discharge (DoD). A LiFePO4 bank is typically sized to 80% DoD (the safe usable fraction); lead-acid to 50% DoD to preserve cycle life. The calculator adds 10% headroom for the conservative figure.
Battery Wh = Load_W × Autonomy_hrs ÷ DoD Example (LiFePO4, 48 hrs, 55 W): 55 × 48 ÷ 0.80 = 3,300 Wh = 3.3 kWh
Typical load reference: Bitcoin nodes and local AI hardware
The table below lists representative continuous wattages for common sovereign compute hardware. Measure your actual load with a Kill-A-Watt or smart plug before finalising solar sizing — idle, sync, and inference loads differ significantly.
| Hardware | Idle / sync (W) | Inference / peak (W) | Notes |
|---|---|---|---|
| Raspberry Pi 4 (node only) | 4–6 W | 6–8 W | Umbrel, Start9, RoninDojo |
| Raspberry Pi 5 | 5–8 W | 9–12 W | Active cooler adds ~1 W |
| RPi 5 + Hailo-8L HAT (NPU) | 8–12 W | 25–40 W | Llama 3 2B inference; HAT draws ~15 W at load |
| Mini-PC (Intel N100 / N305) | 8–15 W | 20–30 W | Beelink EQ12, GMKtec — fanless options exist |
| Mini-PC + Hailo-8 (M.2) | 15–25 W | 45–65 W | Llama 3 8B quantized; good solar candidate |
| NVIDIA Jetson Orin NX 16 GB | 10–15 W | 25–40 W | Efficient edge AI; max power envelope ~40 W |
| Mini-PC + RTX 3060 eGPU | 50–80 W | 170–200 W | Requires AC inverter; significantly larger solar array |
| Mini-PC + RTX 4060 desktop | 70–100 W | 180–220 W | Runs 13B–34B models; high solar demand |
| Router / switch (add to total) | 5–15 W | 5–20 W | Include in total system load |
For the best solar ROI, target the RPi 5 + Hailo-8L or mini-PC + Hailo-8 tier: full local-AI capability at under 60 W peak draw. See local LLM setup options in Canada and distributed compute infrastructure for more on low-power inference hardware.
Provincial peak sun hour reference
The values below are representative peak sun hours (PSH) per day for major population centres in each province and territory, drawn from Natural Resources Canada’s Photovoltaic Potential and Solar Resource Maps of Canada. PSH values represent the equivalent hours of full 1,000 W/m² irradiance and are used directly in panel sizing calculations. These are representative averages — use the NRCan PVGIS tool for site-specific data.
| Province / Territory | Summer PSH (hrs/day) | Winter PSH (hrs/day) | Annual avg PSH | Solar viability note |
|---|---|---|---|---|
| Alberta | 6.3 | 2.5 | 4.4 | Excellent year-round; best winter PSH in Canada |
| Saskatchewan | 6.7 | 2.3 | 4.5 | Among highest annual PSH in Canada |
| Manitoba | 6.1 | 2.1 | 4.3 | Strong prairie solar resource |
| Ontario | 5.7 | 2.2 | 3.9 | Good; southern ON better than northern |
| Quebec | 5.7 | 2.0 | 3.8 | Good; very low grid rates (Hydro-QC) may affect ROI |
| British Columbia | 5.5 | 1.9 | 3.7 | Variable; interior BC significantly better than coast |
| New Brunswick | 5.4 | 2.0 | 3.7 | Reasonable; higher grid rates improve solar ROI |
| Prince Edward Island | 5.3 | 2.0 | 3.6 | Moderate; strong wind alternative on PEI |
| Nova Scotia | 5.1 | 1.9 | 3.5 | Moderate; coastal fog reduces effective PSH |
| Newfoundland & Labrador | 4.8 | 1.5 | 3.1 | Lowest in Atlantic Canada; consider hybrid |
| Yukon | 6.8 | 0.6 | 3.1 | Excellent summer; near-zero usable solar Dec–Jan |
| Northwest Territories | 6.5 | 0.5 | 3.2 | Seasonal solar only; diesel backup required in winter |
| Nunavut | 6.8 | 0.0 | 2.8 | Solar unusable in polar winter; seasonal deployment only |
Source: Natural Resources Canada, Photovoltaic Potential and Solar Resource Maps of Canada. Values are representative for major population centres; actual PSH varies by site latitude, elevation, panel tilt, azimuth, and horizon obstructions. Use the NRCan PVGIS tool for site-specific data.
Design considerations for Canadian off-grid deployments
Optimize for load first, then array size
The most cost-effective solar system is the one powering the smallest justifiable load. Before sizing panels, audit the full load chain: use a DC-native mini-PC (no inverter loss), power-gate the router when the node is idle, and choose NPU-based inference hardware (Hailo-8, Jetson Orin) over GPU-based when solar power is the constraint. Every watt you eliminate from the load cuts the required solar array proportionally.
Winter is the design constraint in most of Canada
Sizing for summer sun and relying on a larger battery to carry you through winter is an expensive approach. The correct engineering method — used in NRCan’s sizing methodology — is to size the panel array for the worst design month (typically December–January in most Canadian provinces). This often means 2–3× more panels than a summer-only calculation would suggest. The calculator defaults to winter PSH for exactly this reason.
LiFePO4 vs. lead-acid in Canadian climates
LiFePO4 (lithium iron phosphate) is the preferred chemistry for off-grid Canadian deployments. It tolerates cold better than other lithium chemistries (though capacity still drops below −10 °C), offers 3,000–6,000 cycles vs. 300–500 for lead-acid, and achieves ~96% round-trip efficiency vs. ~85% for flooded lead-acid. The higher upfront cost is typically justified over a 10-year system life. For a node that must run year-round, keep the battery enclosure above 5 °C with a small thermostat-controlled heater (add its wattage to the load calculation).
Charge controller: MPPT over PWM
Maximum Power Point Tracking (MPPT) charge controllers extract 15–30% more energy from panels in cold weather and low-light conditions — exactly when you need it most in Canadian winters. PWM controllers are acceptable for very small, low-budget systems (sub-100 W arrays) but MPPT is recommended for any serious off-grid compute deployment.
Panel tilt: optimize for winter sun angle
A panel tilted at latitude + 15° captures more winter sun than a panel tilted at true latitude. For Calgary (51°N) that means a 66° tilt — nearly vertical, which also keeps snow from accumulating. Fixed mounts at steep winter-optimized tilt angles are a common Canadian solar practice for year-round off-grid systems.
Grid-tie vs. off-grid for Bitcoin nodes
If your node is in a grid-connected location, a grid-tie solar system (no battery) reduces electricity costs but doesn’t provide outage resilience. A hybrid system (grid-tie with battery backup) allows island-mode operation during outages while exporting surplus power. True off-grid (no utility connection) makes sense in remote locations or where the sovereignty argument is absolute. The calculator targets the true off-grid case; hybrid systems can use a smaller battery bank by drawing from grid during extended cloudy periods.
For more on integrating off-grid energy with mining and compute, see off-grid Bitcoin mining and the energy independence hub.
Frequently asked questions
Can a Bitcoin full node realistically run on solar power in Canada?
Yes — a Bitcoin node running on a Raspberry Pi 4 or Pi 5 draws 4–10 W, which is one of the easiest loads to power off-grid. A single 200 W solar panel and a 1–2 kWh LiFePO4 battery is sufficient for a Pi-based node in most Canadian provinces using a winter design. The harder constraint is keeping your internet connection alive during grid outages — most routers draw 5–15 W and can be included in the same solar budget.
What about running a local AI model alongside the node?
Low-power NPU-based inference hardware (Hailo-8L on RPi 5, or the Hailo-8 M.2 in a mini-PC) draws under 60 W at peak inference — a viable solar target with 2–4× 400 W panels and a 3–5 kWh battery for 48-hour autonomy in a mid-Canada province. GPU-based AI inference (RTX 3060+) is significantly harder to power off-grid, typically requiring 600 W+ panel arrays and 5–10 kWh batteries. See the local LLM in Canada guide for hardware recommendations.
How accurate are the NRCan PSH values used in this calculator?
The values are representative averages for major population centres in each province, derived from NRCan’s published photovoltaic potential maps. They are accurate to within ±15–20% for most locations, but actual PSH at your site depends on your exact latitude, panel tilt angle, azimuth, and local horizon obstructions (trees, buildings, hills). The NRCan PVGIS tool accepts your GPS coordinates and panel parameters to produce a site-specific estimate. For an off-grid system, always use site-specific data before purchasing equipment.
What is “system efficiency” and why does it matter?
System efficiency is the fraction of energy captured by the solar panels that actually reaches your load. Losses include the charge controller (MPPT controllers are ~93–97% efficient), battery round-trip losses (LiFePO4 ~95–98%, lead-acid ~80–85%), wiring resistance (~1–3%), temperature derating of panels in cold weather (panels are rated at 25 °C — cold panels are actually slightly more efficient; hot panels lose ~0.4% per °C above 25 °C), and soiling/shading. A well-designed Canadian system with MPPT and LiFePO4 achieves ~80% overall; the calculator’s conservative figure of 70% is appropriate for older or less-optimized equipment.
Should I use a 12 V, 24 V, or 48 V battery bank?
For loads under ~500 W, a 12 V system is practical. For 500 W–2 kW, a 24 V system reduces cable currents significantly. For larger off-grid arrays (2+ kW), 48 V is standard and dramatically reduces conductor sizing and associated losses. Most mini-PCs and small compute nodes can be powered directly via DC-DC converters from any of these bus voltages, eliminating the need for an AC inverter (and the ~10% efficiency penalty that comes with it).
Does the solar setup affect Bitcoin node sync time?
No — Bitcoin initial block download (IBD) speed is constrained by CPU, storage I/O, and network bandwidth, not by power source. The node does not know or care whether power comes from solar or the grid. However, an undersized battery bank that drops voltage and shuts down the node mid-sync will require restarting IBD from the last checkpoint, which is an annoyance. Size the battery for at least 48 hours of autonomy to ride through cloudy days without interruption.
Is this calculator suitable for designing a production off-grid solar system?
No. This calculator provides indicative sizing ranges for planning and budgeting purposes only. A production off-grid solar installation requires: (1) a site survey for shading and orientation, (2) engineering calculations by a qualified solar designer, (3) equipment selection validated against local building codes and CEC/CSA standards, (4) permitting as required by your municipality, and (5) installation by a licensed electrician in most Canadian jurisdictions. This tool is a starting-point resource, not a substitute for professional design. This is not professional engineering advice.
Where can I learn more about off-grid Bitcoin mining and sovereign computing?
See the off-grid Bitcoin mining guide for mining-specific energy design, the energy independence hub for the broader sovereign energy context, and the distributed compute infrastructure page for the intersection of compute sovereignty and physical infrastructure. For local AI hardware selection, the local LLM in Canada guide covers low-power inference options.