Your complete off-grid power system, engineered in minutes
Answer a few questions about your property, energy needs, and budget. PowerMosaics designs a full system — panels, batteries, charge controllers, inverters, and wiring — with a complete bill of materials and real product links.
5 min
Average time to a full design
40+
Components sized per system
$30
Flat fee, no subscription
100%
Real, purchasable products
How it works
From questionnaire to complete system
No spreadsheets, no guesswork, no forum threads. A working design in minutes.
Tell us about your setup
Answer a short questionnaire about your property, daily energy use, sun exposure, and budget.
AI engineers your system
Our engine sizes panels, batteries, charge controllers, and inverters, then calculates wire gauge and fuse protection.
Get a full bill of materials
Every component is a specific product by brand, wattage, and amp-hour capacity, linked to its listing.
Download your spec sheet
Take your complete, engineered design with you as a downloadable spec sheet and shopping list.
A build-ready plan, not a vague suggestion
Every design is scoped for systems 3kW and smaller so it stays affordable and buildable by a non-engineer with basic DIY skills.
Complete bill of materials
Every panel, battery, charge controller, inverter, breaker, and connector you need — with real product links from reliable sources including Amazon, ready to buy.
Wire sizing & runs
Correct wire gauge (AWG) for each run based on amperage and distance, so nothing overheats and no power is wasted.
Fuse & breaker protection
Recommended fuse and breaker ratings for every circuit, keeping your system safe and up to sensible DIY standards.
Load & capacity math
Daily watt-hour budget, battery bank sizing, and solar array sizing worked out from the exact devices you told us about.
Estimated system cost
A transparent price total built from live product listings, so you know what the whole build costs before you buy anything.
Downloadable spec sheet
A clean, printable summary of your design and shopping list you can take to the workshop or share with a helper.
Anywhere you need power without an electrician
PowerMosaics is intentionally scoped to small systems — so homeowners and small operators can plan and build a dependable setup themselves.
Sheds, barns & workshops
Lights, fans, a few tools, and a security camera without trenching a line from the house.
Greenhouses
Circulation fans, grow lights, and monitoring on a reliable low-voltage supply.
RVs & vans
12V DC accessories, USB charging, a fridge, and lighting for life on the road.
Off-grid cabins
A practical everyday system for lights, small appliances, and connectivity.
Powers everyday essentials
- LED lighting
- Ceiling & exhaust fans
- Small appliances
- Security cameras
- USB-powered devices
- 12V DC accessories
- DC barrel-connector wiring
- Phone & laptop charging
Reviews
Built by DIYers, for DIYers
“I wired my shed for lights, a fan, and a camera in a weekend. The parts list linked straight to trusted retailers and every wire gauge was spelled out. No guesswork.”
Marcus R.
Backyard workshop, Tennessee
“I'm not an electrician, but the fuse and breaker recommendations gave me the confidence to build my van's 12V system myself. Saved me a fortune.”
Dana K.
Van conversion, Oregon
“Told it what I wanted to run in my greenhouse and it sized the panel, battery, and controller perfectly. The $30 paid for itself versus one bad parts purchase.”
Priya S.
Backyard greenhouse, Vermont
One flat price. One complete design.
Answer a few questions about what you want to power. Preview your system for free, then unlock the full build plan and shopping list.
Full system design
No subscription. Pay per design.
- Custom system design for your exact loads
- Complete bill of materials with links to reliable sources
- Wire gauge sizing for every run
- Fuse & breaker protection recommendations
- Battery bank & solar array sizing
- Estimated total system cost
- Downloadable, printable spec sheet
Free preview first — you only pay to unlock the full plan.
Questions, answered
- How big a system can PowerMosaics design?
- PowerMosaics is intentionally scoped to systems 3kW and smaller. That keeps designs affordable, safe, and buildable by a non-engineer with basic DIY skills — ideal for outbuildings, RVs, vans, and off-grid cabins.
- Do I need to be an electrician?
- No. Designs cover low-voltage and small off-grid setups with clear wire sizing, fuse protection, and a step-by-step bill of materials. Basic DIY skills are enough. For anything tied into your home's main electrical panel, we always recommend consulting a licensed electrician.
- Where do the parts come from?
- Your bill of materials links to real products from reliable sources, including Amazon, so you can buy everything in a few clicks. PowerMosaics may earn a small affiliate commission at no extra cost to you.
- What does the $30 cover?
- A single complete system design: the full parts list with links, wire sizing, fuse and breaker recommendations, battery and solar sizing, an estimated total cost, and a downloadable spec sheet. It's a one-time charge per design, not a subscription.
- Can I preview before paying?
- Yes. After you answer the questionnaire you'll see a free summary of your recommended system. You only pay to unlock the complete bill of materials, wiring details, and spec sheet download.
- What can these systems actually power?
- Lights, fans, small appliances, security cameras, USB devices, and 12V DC accessories — including DC barrel-connector wiring. They're designed for practical everyday loads, not whole-home or heavy appliance use.