Guides, comparisons and straight answers
Everything here is written by the team that specs and supports these systems. Start with your use case if you are choosing a system, or go straight to the decision you are stuck on.
Start with your use case
One pillar per market. Each one covers what a complete system includes, the three levels, and where to go next.
RV & Van Power Systems
What a complete RV or van system includes, the three kit levels, and which one fits how you travel.
Marine Power Systems
Lithium house banks, charging that works at anchor and underway, and why marine charging upgrades get a system review.
Off-Grid Cabin & Backup Power
Solar, storage and power conversion for cabins, sheds and remote buildings — including when a generator still earns its place.
Work out what you actually need
The decisions that change everything downstream: how much storage, how much solar, which chemistry, and whether a generator belongs in the picture.
What Size Battery Bank Do I Need?
Size from your daily watt-hours and the days you want without a recharge — not from the amp-hours on a product page.
How Much Solar Do I Need for My RV?
The sun-hours method, per-kit solar sizing, and what to do when the roof will not fit enough panels.
Lithium vs AGM: Which Battery Is Right?
Usable capacity, charging, cold weather and cycle life — including when AGM is genuinely the better choice.
Battery Backup vs Generator for a Cabin
They solve different problems and pair well. Where one stops and the other starts.
How the power gets back in — and gets connected
Charging is where most systems are actually limited, and installation is where most of them go wrong.
Can My Alternator Charge Lithium Batteries?
Often not by itself. What a stock alternator does to a lithium bank, and the two safe ways to charge from an engine.
Marine Power Upgrade: What to Check First
Loads, bank sizing, recharging, monitoring, solar and protection — in the order they actually matter.
When Do You Need a Wiring Diagram?
A product manual explains a component. A wiring diagram explains your system — and when a build genuinely needs one.
How APS thinks about power
The arguments behind the way these systems get designed.
Why Modern Off-Grid Power Is DC Power
Most of what you run is already DC. What that means for how a system should be designed.
5 Mistakes That Ruin DIY Camper Electrical Systems
The five failures we see most, all of them decisions made early and expensive to undo later.
Still deciding?
Three ways in, depending on how far along you are.
Frequently Asked Questions
Straight answers on sizing, batteries, charging, installation and support.
The Power Guide
Three questions about what you run, how long you stay out and how you recharge — then a system path.
Talk to a Power Professional
For existing systems, complex vessels, and anything that needs a human to look at it.
Not sure where to start?
The Power Guide asks what you run, how long you stay out, and how you recharge — then points at a system.