# FitMyPower

> Size solar and batteries to the loads you run

FitMyPower helps you size battery storage, solar panels and off-grid power to your loads, runtime and sun hours, using manufacturer specs and public guidance from NREL and the U.S. Department of Energy.

Rules: informational only, compiled from manufacturer specs and public references; no hands-on testing. Affiliate links (Amazon Associates); no Amazon prices are shown.

## Pages

- [FitMyPower](https://fitmypower.com/): FitMyPower helps you size battery storage, solar panels and off-grid power to your loads, runtime and sun hours. We compile manufacturer specs (watt-hours, inverter watts, panel watts) and public guidance from NREL and the U.S. Department of Energy, and we do not test equipment ourselves.
- [Articles and buying guides](https://fitmypower.com/articles/): Buying guides and explainers built from published specs.
- [Comparisons](https://fitmypower.com/compare/): Category-versus-category comparisons from published specs.
- [Power gear picks and deals](https://fitmypower.com/deals/): Portable power stations, LiFePO4 batteries, solar panels, charge controllers and inverters, matched to the fit tool.
- [Frequently asked questions](https://fitmypower.com/faq/): Direct answers to common questions, plus plain-English definitions of power terms.
- [Power fit tool](https://fitmypower.com/power-planner/): Pick RV, power outage or off-grid, list your loads, and get battery Wh, inverter continuous and surge watts, and solar input, with every figure sourced.
- [Head to Head: Anker SOLIX C1000 vs EcoFlow DELTA 3](https://fitmypower.com/articles/anker-solix-c1000-vs-ecoflow-delta-3/): Two expandable 1,800W stations: which expansion path and charging setup fits you?
- [Head to Head: Anker SOLIX C1000 vs Jackery Explorer 1000 v2](https://fitmypower.com/articles/anker-solix-c1000-vs-jackery-explorer-1000-v2/): Two popular ~1kWh LiFePO4 stations: more output and solar, or less weight?
- [Battery chemistries for solar storage](https://fitmypower.com/articles/battery-chemistry-guide/): LiFePO4, NMC and lead-acid compared in plain English.
- [Head to Head: BLUETTI AC180 vs EcoFlow DELTA 3](https://fitmypower.com/articles/bluetti-ac180-vs-ecoflow-delta-3/): Two 1,800W LiFePO4 stations: more capacity in one box, or more surge and room to expand?
- [Charge controllers: what they do](https://fitmypower.com/articles/charge-controllers-mppt-vs-pwm/): How a controller protects the battery and why MPPT is common.
- [Head to Head: EcoFlow RIVER 3 vs Anker SOLIX C1000](https://fitmypower.com/articles/ecoflow-river-3-vs-anker-solix-c1000/): Small and light, or a kilowatt-hour? How to tell whether a 245Wh station is enough.
- [Home backup batteries: how they connect](https://fitmypower.com/articles/home-backup-battery-basics/): Whole-home vs essential-loads backup, transfer equipment and permits.
- [How to size a battery bank](https://fitmypower.com/articles/how-to-size-a-battery-bank/): Turn your daily loads into a battery size in watt-hours.
- [Inverter sizing: continuous watts and surge](https://fitmypower.com/articles/inverter-sizing-and-surge/): Why start-up surge often decides the inverter, not running watts.
- [Head to Head: Jackery Explorer 1000 v2 vs BLUETTI AC180](https://fitmypower.com/articles/jackery-explorer-1000-v2-vs-bluetti-ac180/): The lightest 1kWh-class station we cover against the one with the most capacity.
- [Planning off-grid power for a cabin](https://fitmypower.com/articles/off-grid-cabin-planning/): Loads, autonomy, backup generation and the winter problem.
- [Off-Grid Builds: an RV lithium and solar upgrade](https://fitmypower.com/articles/off-grid-rv-upgrade/): Swap an RV's lead-acid batteries for Group 24 LiFePO4, add roof solar and a 1,000W inverter for boondocking.
- [Off-Grid Builds: a solar shed workshop](https://fitmypower.com/articles/off-grid-shed-workshop/): Power tools have big surges. A sample 12V shed system with a 2,000W inverter, a battery bank sized for the current, and solar.
- [Off-Grid Builds: a small boat house battery](https://fitmypower.com/articles/off-grid-small-boat/): A simple 12V house system for a small boat: one LiFePO4 battery, two 100W panels and a PWM controller for nav lights, electronics and a bilge pump.
- [Off-Grid Builds: a tiny house on solar](https://fitmypower.com/articles/off-grid-tiny-house/): A 24V sample system for a tiny house with a full-size fridge, internet, lights and small appliances.
- [Off-Grid Builds: a camper van electrical system](https://fitmypower.com/articles/off-grid-van-build/): A 12V van build sized around a compressor fridge, fan, lights and laptop, with roof solar and a 1,000W inverter.
- [Off-Grid Builds: a weekend cabin system](https://fitmypower.com/articles/off-grid-weekend-cabin/): A 12V sample system for a weekend cabin: lights, water pump, a small fridge and charging, with sizing math and parts.
- [Outage Ready: a week-long outage](https://fitmypower.com/articles/outage-ready-1-week/): A week without power: what portable gear can and can't do, and when a home battery or generator with a transfer switch makes sense.
- [Outage Ready: a 12-hour outage](https://fitmypower.com/articles/outage-ready-12-hours/): Plan power for an overnight outage: the essentials list, the battery size it takes, and whether you need solar or a generator.
- [Outage Ready: a 2-day outage](https://fitmypower.com/articles/outage-ready-2-days/): Two days without power: battery size, how much solar refills it, and when to trim loads.
- [Outage Ready: a 24-hour outage](https://fitmypower.com/articles/outage-ready-24-hours/): One full day without power: what it takes to keep the fridge, internet and lights going, and where solar helps.
- [Outage Ready: a 3-day outage](https://fitmypower.com/articles/outage-ready-3-days/): Three days without power is where battery-only plans get expensive. Here's a mixed battery, solar and generator plan.
- [Peak sun hours explained](https://fitmypower.com/articles/peak-sun-hours-explained/): The number that turns panel watts into daily watt-hours.
- [Portable power stations: what the specs mean](https://fitmypower.com/articles/portable-power-station-guide/): Capacity, output, solar input and recharge time decoded.
- [Power It Up: running a chest freezer through an outage](https://fitmypower.com/articles/power-a-chest-freezer/): Chest freezers use less energy than fridges. See how far a portable power station goes with one, using the EnergyGuide label.
- [Power It Up: running a CPAP overnight on a power station](https://fitmypower.com/articles/power-a-cpap-overnight/): How many watt-hours a CPAP needs for an 8-hour night, with and without the humidifier, and the smallest power station that covers it.
- [Power It Up: keeping a full-size refrigerator running](https://fitmypower.com/articles/power-a-full-size-fridge/): Turn your fridge's EnergyGuide kWh per year into a daily watt-hour need and see which power station carries it overnight or for a day.
- [Power It Up: running a gaming PC on a power station](https://fitmypower.com/articles/power-a-gaming-pc/): Watt and watt-hour math for a gaming session, why the PSU rating isn't the draw, and which station handles the load and the switchover.
- [Power It Up: can a power station run a space heater?](https://fitmypower.com/articles/power-a-space-heater/): A 1,500 W space heater drains a 1kWh power station in well under an hour. Here's the math and better options for staying warm.
- [Power It Up: backing up a sump pump with a power station](https://fitmypower.com/articles/power-a-sump-pump/): Sump pumps have big start-up surges and run in short bursts. Here's how to size a power station for one during a storm outage.
- [Power It Up: keeping Wi-Fi and the modem online](https://fitmypower.com/articles/power-a-wifi-router-and-modem/): Routers and modems draw very little. See how long even a small power station keeps the internet up during an outage.
- [Power It Up: running a window air conditioner on battery](https://fitmypower.com/articles/power-a-window-ac/): Work out a window AC's watts from its BTU and efficiency rating, then see how long a power station lasts.
- [Solar and battery safety basics](https://fitmypower.com/articles/solar-and-battery-safety/): Fusing, backfeed, generators and battery placement.
- [How many solar watts do you need?](https://fitmypower.com/articles/solar-panel-sizing/): Size an array to refill your battery from daily sun.
- [Spec Check: Anker SOLIX C1000](https://fitmypower.com/articles/spec-check-anker-solix-c1000/): Anker's published C1000 specs (1,056Wh, 1,800W, 58-minute recharge) and what they mean in usable watt-hours.
- [Spec Check: BLUETTI AC180](https://fitmypower.com/articles/spec-check-bluetti-ac180/): BLUETTI's published AC180 specs (1,152Wh, 1,800W, 1,440W Turbo charging) and what they mean in usable watt-hours.
- [Spec Check: EcoFlow DELTA 3](https://fitmypower.com/articles/spec-check-ecoflow-delta-3/): EcoFlow's published DELTA 3 specs (1,024Wh, 1,800W, 3,600W surge, expandable to 5kWh) and what they mean in usable watt-hours.
- [Spec Check: EcoFlow RIVER 3](https://fitmypower.com/articles/spec-check-ecoflow-river-3/): EcoFlow's published RIVER 3 specs (245Wh, 300W, LiFePO4) and what they mean in usable watt-hours.
- [Spec Check: Jackery Explorer 1000 v2](https://fitmypower.com/articles/spec-check-jackery-explorer-1000-v2/): Jackery's published Explorer 1000 v2 specs (1,070Wh, 1,500W, 23.8 lb) and what they mean in usable watt-hours.
- [12 V, 24 V or 48 V: choosing system voltage](https://fitmypower.com/articles/system-voltage-12-24-48/): Why bigger systems move to higher voltage.
- [Watts, watt-hours and amp-hours explained](https://fitmypower.com/articles/watt-hours-explained/): The three numbers on every battery and how they relate.
- [Generator vs battery backup](https://fitmypower.com/compare/generator-vs-battery-backup/): Runtime, noise, fuel, upkeep and safety.
- [LiFePO4 vs lead-acid batteries](https://fitmypower.com/compare/lifepo4-vs-lead-acid/): Cycles, usable capacity, weight and cold-weather behavior.
- [MPPT vs PWM charge controllers](https://fitmypower.com/compare/mppt-vs-pwm/): Harvest, voltage flexibility and when PWM is enough.
- [Portable power station vs home battery](https://fitmypower.com/compare/power-station-vs-home-battery/): Plug-and-play portability vs wired-in backup.
- [Rigid vs portable folding solar panels](https://fitmypower.com/compare/rigid-vs-portable-panels/): Durability, efficiency per square foot and setup.
- [Head to Head series](https://fitmypower.com/articles/series/head-to-head/): Two power stations people often weigh against each other, compared spec by spec, ending with who should buy which.
- [Off-Grid Builds series](https://fitmypower.com/articles/series/off-grid-builds/): Sample 12V and 24V systems for a cabin, van, tiny house, shed workshop, RV and boat, each with a load list, sizing math, parts list and wiring outline.
- [Outage Ready series](https://fitmypower.com/articles/series/outage-ready/): Plans for a typical home through outages from 12 hours to a week: what to keep running, how much battery that takes, and when solar or a generator has to fill the gap.
- [Power It Up series](https://fitmypower.com/articles/series/power-it-up/): One device per post: how many watts it pulls, how many watt-hours it needs overnight or for a day, and the smallest power station that can carry it.
- [Spec Check series](https://fitmypower.com/articles/series/spec-check/): One popular power station per post: the manufacturer's published specs with sources, and what they mean in usable watt-hours. We compile specs; we don't lab-test units.