Energy Independence
You'll know exactly how much power your family uses, exactly what it takes to make it yourself, and exactly what to build first — even if you've never wired anything.
Honest solar math for 2026, DIY paths that recover the tax credit you lost, battery sizing that survives a February ice storm, and backup heat that doesn't need a single watt. Every number here came off a meter, not a spec sheet.
Get My LivingIQIn this hub
7 guides
across 6 subtopics — every one of them written from a system running on real ground, with the numbers left in.
Start here
Read in this order and you'll go from "I don't know what I have" to a costed first build.
Solar PV
How to Size an Off-Grid Solar Array From Real Load Data
Skip the rules of thumb. Meter your loads for 30 days, size for your worst solar month, and build an off-grid array that carries the house through January.
12 minIntermediate
Solar PV
Is Solar Still Worth It in 2026? Honest Post-Tax-Credit Payback Math
Real 2026 payback numbers on three quotes after the residential tax credit expired, plus the three DIY paths that recover the lost 30% without cutting corners.
14 minBeginner
Batteries & Backup Power
How Long Can a Battery Run a Refrigerator? Real Metered Runtimes
Metered daily draw for four refrigerators, the runtime formula that accounts for inverter and temperature losses, and the battery size that carries a fridge 24, 48 and 72 hours.
10 minBeginner
Most off grid solar system advice online is written by people selling kits. The guides in this hub start somewhere else: with thirty days of metered load data off a real farmhouse, a worst-month sun-hour figure, and the honest post-tax-credit payback for 2026. You'll see array sizing, inverter and bus-voltage choices, and what each stage costs before you spend anything.
Home battery backup is where most budgets break. Instead of quoting whole-house storage, these guides size the bank around the loads you refuse to lose — fridge, well pump, furnace blower, lights, internet — and show measured runtimes rather than nameplate math. If you're weighing LiFePO4 against lead-acid, there are six winters of cost data here.
Off-grid living doesn't have to start with a system. Backup heat that needs zero watts, load-shifting to solar noon, and micro hydro on a year-round creek are all cheaper first moves than another battery. Start with the sizing calculator on this page, then work through the guides below in order.
7 guides covering home battery backup, off grid living, solar panel cost 2026, how to heat a house without electricity.
Solar PV
Is Solar Still Worth It in 2026? Honest Post-Tax-Credit Payback Math
Real 2026 payback numbers on three quotes after the residential tax credit expired, plus the three DIY paths that recover the lost 30% without cutting corners.
14 minBeginner
Batteries & Backup Power
How Long Can a Battery Run a Refrigerator? Real Metered Runtimes
Metered daily draw for four refrigerators, the runtime formula that accounts for inverter and temperature losses, and the battery size that carries a fridge 24, 48 and 72 hours.
10 minBeginner
Solar PV
How to Size an Off-Grid Solar Array From Real Load Data
Skip the rules of thumb. Meter your loads for 30 days, size for your worst solar month, and build an off-grid array that carries the house through January.
12 minIntermediate
Solar PV
LiFePO4 vs Lead-Acid Batteries: Six Winters of Real Data
Cost per kWh cycled, cold-weather performance, maintenance hours and voltage sag compared across six years of flooded lead-acid and three years of LiFePO4.
9 minIntermediate
Solar Heating
Drain-Back Solar Hot Water for Cold Climates: Full Build
Build a glycol-free drain-back solar hot water system that survives sub-zero winters. Slope requirements, reservoir sizing, controls and commissioning.
14 minAdvanced
Backup Heat
How to Heat a House Without Electricity: Four Tested Backup Heat Options
Wood stove, propane, kerosene and passive solar compared on real cost per BTU, safety and outage performance, plus how to keep one room at 68°F on zero watts.
11 minIntermediate
Micro Hydro
Micro Hydro Feasibility: Measuring Head and Flow on Your Creek
Measure head and dry-season flow on a homestead creek and calculate realistic micro hydro output before you spend a dollar on a turbine.
10 minIntermediate
Free tool
Your bill already knows the answer. Enter it, pick the loads you refuse to lose in an outage, and you'll get the array size, the battery bank and what you'd stop paying the utility.
Skip the trial and error
Lights-On GuaranteeRenewable Energy
4.9 · 63 reviews
Eight 415W panels, a 60A MPPT controller, 5 kWh of LiFePO4 storage and a 3 kW inverter — the exact stack running our workshop.
“Sized it Friday, mounted panels Saturday, ran the house off it Sunday. Our January outage lasted 19 hours and we never noticed.”
$4,890$5,290
Water-Flows GuaranteeWater
4.9 · 41 reviews
Helical rotor DC pump, controller, safety rope and drop pipe sized for deep wells with no grid connection.
“Five days without power and the taps never stopped. The pump just runs whenever the sun is up and the tank stays full.”
$2,140
Bill-Drop GuaranteeRenewable Energy
4.7 · 18 reviews
Two evacuated tube collectors, an 80-gallon exchange tank and the drain-back controls for freezing climates.
“The sizing worksheet told me I needed half the array the installer quoted. I built it myself over two weekends and my last twelve bills total $214.”
$3,260
Intermediate · 34 lessons
Size, spec and wire a system that carries a household through the worst month of the year.
$249
Proof
"The sizing worksheet told me I needed half the array the installer quoted. I built it myself over two weekends and my last twelve bills total $214."
Dana Whitfield
Boone, North Carolina
4,180 kWh produced · $2,340 saved in year one
"I metered the fridge like the guide said and realized I needed half the battery the salesman quoted. Ran nine days on it during the February storm without touching the generator."
Curtis Vance
Sedalia, Missouri
9-day outage covered · $3,100 under quote
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The newsletter
One letter every other Sunday: what we built this week on the mountain, what failed, and the numbers behind it. No fluff, no sponsored filler.