Batteries
12V UL Certified
Certified to UL1973. Consistent quality, audited over time.
12V Budget
Cheaper per amp-hour. Reliable today, no long-term guarantee.
48V UL Certified
Required if you are permitting your system or tying to the grid.
48V Budget
Great build quality, but off-grid use only — not permit-legal.
Battery Capacity Testers
After a few years, you need to test the capacity of your system.
Inverters
12V Off-Grid
RVs, boats, vans and small cabins. 1,000–3,000W.
48V Off-Grid
Run a whole house off-grid. 6,000–12,000W.
48V Hybrid
Grid-tied plus battery backup. Certified for interconnection.
High-Voltage Residential
Highest efficiency. This is what I run in my own home.
3-Phase Commercial
Take an entire warehouse off-grid. Effectively unlimited capacity.
Solar Panels
Mobile Panels
Lightweight and low-profile for RVs, vans and trailers.
Standard Panels
Best cost per watt for homes, ground mounts and carports.
Solar Mounting
Ground Mount
Fast to assemble, engineered and legal for permitted installs.
Roof Mounted
Low-profile systems engineered for secure, long-lasting roof installations.
Solar Carports
Dual-purpose structures that provide shade while generating clean energy.
Generators
Anker Solar Generators
Build a system in minutes! Beginner friendly and reliable.
Jackery HomePower
This is the only Jackery that I like. The output for the size and price is fantastic.
System Packages
- Will Prowse's Systems
Don't Want to Piece it Together?
These are complete, wire-by-wire builds I’ve assembled and tested myself. Every fuse, lug and breaker is specified, so nothing shows up missing on install day.
Hand-Truck 48V System
Portable 5 kWh, builds in 25 minutes ~$1,900
Budget Whole-Home Backup
10 kW inverter, 16 or 32 kWh battery from ~$3,800
Off-Grid Home Blueprint
Whole-house off-grid, 5–12 kW ~$9,800
Code-Compliant 48V System
Grid-tie hybrid, permit & inspection ready ~$13,500
Components
Battery Chargers
Reliable charging for lithium batteries.
Wire & Connectors
Wiring essentials for a clean, reliable setup.
Fuses & Breakers
Essential protection for your electrical system.
Crimpers & Tools
Tools for building and maintaining your system.
Battery Monitors
Track your battery’s power and performance.
Solar-friendly A/C
Efficient cooling built for off-grid power.
12V Fridges
Efficient cooling for life on the road.
Components
Van or RV
Van or RV
Mobile, 12V, tight on space and weight
Boat
Boat
Marine-rated, waterproof, heated cells
Cabin or Shed
Cabin or Shed
Small off-grid build, 12V or 48V
Whole House
Whole House
Off-grid or grid-tied with backup
