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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

EG4 6000XP 48V off-grid inverter
  • Inverters

48V Off-Grid Inverters

Reliable 48V inverters built for home, cabin, and off-grid power systems.

Important: These inverters are not outdoor rated. Install in a dry, protected indoor location away from moisture and rain.

Affiliate links below

  • 48V Off-Grid Inverters

EG4 6000XP

Currently the most popular off-grid inverter. Reliable. And better than anything before it:
  • 6,000W AC Output
  • 120/240V Output
  • 8,000W Solar Input
  • 480V PV Voltage Limit
  • Remote Monitoring
  • Built-in PV disconnect
  • Built-in Input and Output Breakers (first on market to do so)

I have tested everything on this inverter and it will not break. I have tested all the features and built large systems with multiple units. You cannot go wrong with this unit. The only thing I dislike is the screen interface for changing settings.

EG4 6000XP Inverter

Reliable 6kW power for home backup and off-grid systems.

See Where to Buy
  • 48V Off-Grid Inverters

EG4 12000XP 
(Built in USA)

Now this is my favorite inverter. Imagine taking a 6000XP and doubling the output! I use two of these in my lab to test large batteries and communication protocols. This is my favorite EG4 product currently. The interface is easy to use unlike the 6000XP or their hybrid inverters and it is incredibly powerful.

I also run one unit in a hot metal building here in Las Vegas and it never has had over temp disconnect. It runs my bomb shelter and tiny home. Love this thing.

Features

  • 12,000W AC Output w/ Surge up to 18,000W! I have tested this with my car lift and EV chargers. It does not skip a beat.
  • 120V/240V Output
  • 24,000W PV Input!
  • 480V Solar Voltage Limit
  • Remote Monitoring
  • And so much more. This thing can run most houses!

EG4 12000XP Inverter

High-output 12kW power for larger homes and demanding loads.

See Where to Buy
  • 48V Off-Grid Inverters

SRNE 5000W Inverters

This thing is incredible. If you cannot afford an EG4, check these out.
  • I have run an entire MWh through one of these units without issue. This company makes incredibly reliable inverters.
  • No need for Wifi connection or updates. It works out of the box without issue.
  • Simple interface that just works.

People love these things. If you need something reliable and at a low price, this is what you need.

  • Please note, these are all the same inverter but just relabeled.

SGPWOSAY 5000W Inverter

Practical 5kW power for everyday off-grid energy needs.

Check Price on Amazon

ECO-WORTHY 5000W Inverter

Versatile 5kW inverter for solar, battery, and backup systems.

Check Price on Amazon

PowMr 5000W Inverter

Affordable 5kW solution for compact off-grid setups.

Check Price on Amazon

EcoSolLi 6500W Inverter

Flexible 6.5kW power for higher-demand off-grid systems.

Check Price on Amazon

SUNGOLDPOWER 10000W Inverter

10kW solution for whole-home backup and off-grid use.

Check Price on Amazon
  • 48V Off-Grid Inverters

SRNE 10,000W Inverter

One of my all-around favorites. Extremely powerful and literally the cheapest around for the money. I have been running one for six months and love it.

  • Real 10,000W output with an incredible surge. Even if it is imbalanced. I can run a car lift on a single leg!
  • Huge PV input capacity. 11,000W at 500V
  • 200A battery charging
  • Simple interface and no need for updates
  • Lower idle consumption compared to the other SRNE models

Which makes it one of my favorites. Lots of people on the forum are running this inverter with great results.

It is one of the four inverters in my Budget Whole-Home Backup build.

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Will Prowse

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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.