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
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 ~$2,400

Off-Grid Home Blueprint

Full 48V house system ~$9,800

Code-Compliant 48V System

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

Mobile, 12V, tight on space and weight

Boat

Marine-rated, waterproof, heated cells

Cabin or Shed

Small off-grid build, 12V or 48V

Whole House

Off-grid or grid-tied with backup

Boat

Your Complete Boat Power System

Reliable onboard power takes more than a battery and an inverter. Every component must work together safely and efficiently in a demanding marine environment, where moisture, vibration, salt exposure, and constant movement all affect performance. From solar and engine charging systems to energy storage, shore power connections, monitoring, and circuit protection, every part of the system must be properly designed and integrated to ensure reliability both at sea and in port.

What Every Boat Power System Needs

Solar Panels

Generate quiet, renewable power while cruising or anchored.

Solar Charge Controller

Regulates solar energy and safely charges the house battery.

LiFePO4 Battery

Stores power for electronics, lighting, refrigeration, and onboard appliances.

Inverter

Runs AC appliances and recharges the battery when shore power is available.

Alternator Charging

Recharges the house bank from the engine while underway.

Shore Power Charger

Provides dependable charging and AC power while docked.

Battery Monitoring

Tracks system performance and protects wiring and equipment.

Protection & Distribution

Safely distributes power through switches, busbars, fuses, and breakers.

Recommended Boat Components

My recommended products for building a dependable onboard power system.

Best Value

12V UL Certified

Certified to UL1973. Consistent quality, audited over time.

See my picks →

12V Off-Grid

RVs, boats, vans and small cabins. 1,000–3,000W.

See my picks →

Mobile Panels

Lightweight and low-profile for RVs, vans and trailers.

See my picks →

Don’t Forget the Small Parts

Complete your installation with corrosion-resistant wiring, reliable protection, and components designed for demanding marine conditions.

What Can Your Boat System Run?

Build around the equipment you rely on and make sure your battery bank can support both continuous loads and short bursts of high power.

Navigation & Communications

Power chartplotters, radios, radar, AIS, and other essential electronics.

Refrigeration

Keep food and drinks cold during day trips and extended cruising.

Lighting & Comfort

Run cabin lights, fans, outlets, entertainment, and personal electronics.

Pumps & Deck Equipment

Support water pumps, bilge pumps, windlasses, and other intermittent loads.

Motors and pumps can draw high startup current. Size the battery, cables, protection, and inverter for the highest expected load.

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DIY Solar Power with Will Prowse