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Off-Grid System Builder

Tell us what you'll run — we'll size the whole system and keep every part compatible.

Register free to save your build and share it with others.

Step 1
What You'll Run
Step 2
Solar Panels
Step 3
Charge Controller
Step 4
Battery Bank
Step 5
Inverter
Step 6
Review
Try a Demo Build: Pre-loads appliances, sizes the system, and picks parts build v2026-08-13.2
Voltage: —
Panels: —
Controller: —
Battery: —
Inverter: —
Total: $0.00

Step 1 — What Will You Run?

Search and add what you'll run — we total your load and size the whole system, no electrical math required.

Run W = continuous draw · Surge W = the startup spike (motors & compressors jump 2–4×). We size your inverter so it can ride a worst-case surge if everything kicks on at once — not just the steady load.

Not sure what you need? Start from a budget.
Tell us what you'd like to spend and we'll show roughly what it powers — then build it in one tap.
or
Appliance
Run W
Surge W
Qty
Hrs/Day
Type

Are you a manufacturer or supplier of off-grid products? We are actively expanding our catalog. Get in touch and let us know what you carry.

Don't see your brand in the builder?

We're always adding trusted off-grid suppliers. If you're a manufacturer or distributor and want your panels, batteries, inverters or gear listed in the AOG System Builder and store, we'd like to talk.

Suppliers — get your products listed →
Shopping and want a brand we don't carry yet? Tell us — we'll reach out to the supplier for you.
More Off-Grid Tools
⚡Load Calculator →Total your daily power use☀️Solar Calculator →Size panels, battery & inverter🔋Battery Runtime →How long will a bank last🔌Wire Size Calculator →Right gauge, safe voltage drop💵Payback Calculator →When solar pays for itself

Shop your build

Hand-picked off-grid gear that works together — shop the categories that complete your build.

Batteries →
The heart of your bank, LiFePO4.
Charge Controllers →
MPPT regulation.
Inverters →
DC to AC for your household.
Off-Grid Appliances →
Efficient 12/24V gear.

Frequently Asked Questions

How do I size an off-grid solar system for my appliances?

List the appliances you plan to run and how many hours a day each one runs. Multiply watts by hours to get watt-hours per day, then size your solar array to replace that energy in your available sun hours, your battery bank to store enough for your backup days, and your inverter to cover your peak running watts plus surge. Our system builder does this math for you as you add appliances and then picks matching products.

What size inverter, battery and solar array do I need?

Your inverter must handle your total running watts plus the biggest motor surge — we size it to running watts times 1.25. Your battery bank is sized from your daily watt-hours times your backup days, divided by system voltage, allowing for usable depth of discharge. Your solar array is sized to replace your daily watt-hours within your local peak sun hours. The builder calculates all three targets automatically.

How do I keep my off-grid components compatible so nothing gets damaged?

Every component in a system must share the same nominal voltage — a 24V battery bank needs a 24V-capable inverter and a charge controller rated for your array. The system builder flags any part whose voltage does not match your chosen system voltage and warns you when a part is too small for your load, so you cannot accidentally order a mismatched or undersized kit.

Should I choose a 12V, 24V or 48V off-grid system?

Use 12V for small cabins, RVs and weekend retreats up to about 1,500W of load. Choose 24V for most off-grid homes up to roughly 4,000W. Go with 48V for large homes and heavy loads — it is the most efficient and uses the least copper wire. The builder can pick the voltage for you based on the appliances you enter.