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Find My Gear
Batteries
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12V UL Certified Certified to UL1973. Consistent quality, audited over time.
12V UL-certified LiFePO4 battery
12V UL Certified
Certified to UL1973. Consistent quality, audited over time.
12V Budget Cheaper per amp-hour. Reliable today, no long-term guarantee.
12V budget LiFePO4 battery
12V Budget
Cheaper per amp-hour. Reliable today, no long-term guarantee.
48V UL Certified Required if you are permitting your system or tying…
48V UL-certified wall-mount home battery
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.
48V budget server rack battery
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…
ITECH battery capacity tester
Battery Capacity Testers
After a few years, you need to test the capacity of your system.
Inverters
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12V Off-Grid RVs, boats, vans and small cabins. 1,000–3,000W.
Victron MultiPlus-II 12V inverter charger
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.
EG4 6000XP 48V off-grid inverter
48V Off-Grid
Run a whole house off-grid. 6,000–12,000W.
48V Hybrid Grid-tied plus battery backup. Certified for interconnection.
48V hybrid inverter
48V Hybrid
Grid-tied plus battery backup. Certified for interconnection.
High-Voltage Residential Highest efficiency. This is what I run in my own…
High-voltage residential inverter
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.
3-phase commercial inverter
3-Phase Commercial
Take an entire warehouse off-grid. Effectively unlimited capacity.
Solar Panels
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Mobile Panels Lightweight and low-profile for RVs, vans and trailers.
Flexible mobile solar panel
Mobile Panels
Lightweight and low-profile for RVs, vans and trailers.
Standard Panels Best cost per watt for homes, ground mounts and carports.
Standard rigid solar panel
Standard Panels
Best cost per watt for homes, ground mounts and carports.
Solar Mounting
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Ground Mount Fast to assemble, engineered and legal for permitted installs.
Solar panel ground mount
Ground Mount
Fast to assemble, engineered and legal for permitted installs.
Roof Mounted Low-profile systems engineered for secure, long-lasting roof installations.
Roof-mounted solar panels
Roof Mounted
Low-profile systems engineered for secure, long-lasting roof installations.
Solar Carports Dual-purpose structures that provide shade while generating clean energy.
Solar carport
Solar Carports
Dual-purpose structures that provide shade while generating clean energy.
Generators
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Anker Solar Generators Build a system in minutes! Beginner friendly and reliable.
Anker SOLIX solar generator
Anker Solar Generators
Build a system in minutes! Beginner friendly and reliable.
Jackery HomePower This is the only Jackery that I like. The output…
Jackery HomePower solar generator
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

Hand-Truck 48V System

Portable 5 kWh, builds in 25 minutes ~$1,900

Budget Whole-Home Backup

Budget Whole-Home Backup

12 kW inverter, 32 kWh battery from ~$4,750

Off-Grid Home Blueprint

Off-Grid Home Blueprint

Whole-house off-grid, 5–12 kW ~$9,800

Code-Compliant 48V System

Code-Compliant 48V System

Grid-tie hybrid, permit & inspection ready ~$13,500

Components
Battery Chargers Reliable charging for lithium batteries.
Lithium battery charger
Battery Chargers
Reliable charging for lithium batteries.
Wire & Connectors Wiring essentials for a clean, reliable setup.
Solar wire and connectors
Wire & Connectors
Wiring essentials for a clean, reliable setup.
Fuses & Breakers Essential protection for your electrical system.
DC fuses and circuit breakers
Fuses & Breakers
Essential protection for your electrical system.
Crimpers & Tools Tools for building and maintaining your system.
Battery cable crimping tool
Crimpers & Tools
Tools for building and maintaining your system.
Battery Monitors Track your battery’s power and performance.
Battery monitor with shunt
Battery Monitors
Track your battery’s power and performance.
Solar-friendly A/C Efficient cooling built for off-grid power.
Solar-friendly mini split air conditioner
Solar-friendly A/C
Efficient cooling built for off-grid power.
12V Fridges Efficient cooling for life on the road.
12V portable fridge
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

  • USE CASE

Whole House

  • Build it right

Your Complete Whole-Home Power System

A whole-home energy system integrates solar panels, certified battery storage, smart power conversion, and automatic backup switching. All components operate together as one safe system to keep your home powered during outages, support essential loads, and reduce reliance on the utility grid while improving overall energy independence and efficiency.

  • The complete system

What Every Whole-Home Power System Needs

Solar Panels

Generate clean energy for immediate use and battery charging.

Solar Mounting

Secure the array to the roof or a permitted ground-mounted structure.

Hybrid Inverter

Manages power from solar, batteries, the grid, and a backup generator.

Certified Battery Storage

Stores energy for nighttime use, peak demand, and power outages.

Automatic Transfer Switch

Safely switches the home from grid power to backup power.

Critical Loads Panel

Keeps selected essential circuits powered during an outage.

System Monitoring

Tracks solar production, battery status, home consumption, and grid use.

Protection & Distribution

Safely controls power through disconnects, breakers, wiring, and distribution equipment.

  • Will’s tested picks

Recommended Whole-Home Components

Complete your system with the wiring, protection, monitoring, and installation tools required for a safe and dependable whole-home build.

48V UL Certified
Permit-legal

48V UL Certified

Required if you are permitting your system or tying to the grid.

See my picks →

48V Budget

48V Budget

Great build quality, but off-grid use only — not permit-legal.

See my picks →

48V Off-Grid
Most Popular

48V Off-Grid

Run a whole house off-grid. 6,000–12,000W.

See my picks →

48V Hybrid

48V Hybrid

Grid-tied plus battery backup. Certified for interconnection.

See my picks →

High-Voltage Residential
Will's Own Build

High-Voltage Residential

Highest efficiency. This is what I run in my own home.

See my picks →

Standard Panels

Standard Panels

Best cost per watt for homes, ground mounts and carports.

See my picks →

Ground Mount

Ground Mount

Fast to assemble, engineered and legal for permitted installs.

See my picks →

Roof Mounted

Roof Mounted

Low-profile systems engineered for secure, long-lasting roof installations.

See my picks →

Solar Carports

Solar Carports

Dual-purpose structures that provide shade while generating clean energy.

See my picks →

  • Complete the installation

Don’t Forget the Small Parts

Complete your system with the wiring, protection, monitoring, and installation tools required for a safe and dependable whole-home build.

Wire & Connectors
Fuses & Breakers
Battery Chargers
Battery Monitors
Capacity Testers
Crimpers & Tools
12V fridges
Solar-friendly A/C
  • Protect what matters

What Do 
You Want Your System to Do?

Your energy usage, peak loads, expected outage duration, and available solar installation area all determine the right system size and overall system configuration for your home.

Essential Backup

Essential Backup

Keep refrigeration, lighting, internet, medical equipment, and selected outlets powered during an outage.

Whole-Home Backup

Whole-Home Backup

Support most household circuits with enough battery capacity and inverter output for longer interruptions.

Energy Independence

Energy Independence

Use solar and battery storage every day to reduce grid consumption and maintain backup power when needed.

  • Power your entire home

What Can Your Whole-Home System Run?

A properly sized system can support everyday household loads, from essential appliances to high-demand equipment.

Everyday Essentials

Keep lights, outlets, internet, security, and personal electronics online.

Refrigeration & Kitchen

Power refrigerators, freezers, selected outlets, and essential kitchen appliances.

Water & Home Systems

Support well pumps, sump pumps, garage doors, and other critical equipment.

Heating & Cooling

Run selected HVAC equipment with a system designed for its continuous and startup power requirements.

HVAC systems, electric water heaters, ovens, dryers, and well pumps can require significant power. These loads must be considered when sizing the inverter, battery bank, wiring, and backup panel.

  • Choose the right architecture

Grid-Tied, Hybrid, or Off-Grid?

The right system architecture depends on how you want to use solar, batteries, and the utility grid.

Backup capability requires compatible equipment and controls that can safely isolate the home from the utility grid during an outage.

Grid-Tied Solar

Grid-Tied Solar

Reduces daytime grid consumption but typically does not provide backup power by itself.

Hybrid Solar + Storage

Hybrid Solar + Storage

Uses solar and batteries every day while maintaining selected or whole-home backup.

Fully Off-Grid

Fully Off-Grid

Operates independently from the utility and requires enough generation and storage for periods of poor weather.

  • Media

My Latest Videos

Visit my Channel
Will Prowse

Visit my Channel

DIY Solar Power with Will Prowse
The Cheapest Way to Power Your Whole House Through the Apocalypse Dead Simple Apocalypse Power: Build It in an Hour I Left a Lithium Battery Outside in Las Vegas for 5 Years Veteran Owned, Eagle Approved, Made in China They Made Plug-In Solar Legal. I Tested It.