ZiaVolt Reference
Portable Power Glossary
Plain-English definitions of every term you'll encounter when shopping for a portable power station. No jargon, no fluff.
80+
Terms Defined
4
Major Brands
5 min
Read Time
A
AC (Alternating Current) power
Power Type
The type of electricity that comes out of wall outlets in your home. Portable power stations use an inverter to convert stored DC battery power into AC power that your appliances can use.
Example: Your refrigerator, laptop charger, and CPAP machine all run on AC power.
Alternator Charging
Charging
Charging your power station from your vehicle's alternator while driving. A cable connects from your car's 12V system to the station's DC input. Typical rates range from 100–800W depending on the vehicle and station.
Example: A 2-hour drive adds 400–800Wh to your station — enough to run a CPAP for a full night.
Ah (Amp-hour)
Capacity
A unit of electrical charge. Often used alongside voltage to describe battery capacity. To get watt-hours (the more useful number), multiply Ah by voltage.
Example: A 12V battery rated at 100Ah stores 1,200Wh (12V × 100Ah = 1,200Wh).
B
Bifacial Solar Panel
Solar
A solar panel that generates electricity from both the front and rear surfaces. The front captures direct sunlight; the rear captures reflected light from the ground beneath. In high-reflectivity environments (snow, sand, concrete), bifacial panels can produce 10–25% more energy than standard panels.
Example: EcoFlow's 220W bifacial panel captures additional power from light reflecting off desert sand — a genuine advantage in New Mexico.
BMS (Battery Management System)
Safety
The electronic brain inside every quality power station. Monitors cell temperatures, voltages, and currents. Protects against overcharging, over-discharging, short circuits, and thermal runaway. The BMS is what stops charging when cells are too cold.
Example: When your station won't charge on a freezing morning, that's the BMS doing its job — protecting the battery from permanent damage.
C
Capacity (Watt-hours / Wh)
Spec
The single most important number on a power station. It tells you how much total energy the battery can store. More Wh = longer runtime for your devices.
Example: A 1,000Wh station can run a 100W device for 10 hours.
Cycle Life
Battery
The number of full charge-discharge cycles a battery can complete before its capacity degrades to a specified percentage (usually 80%). LFP batteries are rated for 3,000–6,000 cycles; older NMC batteries for 500–800 cycles.
Example: A 3,000-cycle station charged once daily will last over 8 years before noticeable degradation.
CPAP (Continuous Positive Airway Pressure)
Medical
A medical device used to treat sleep apnea. A common use case for portable power stations during outages or camping. Typical draw: 30–60W without heated humidifier; 60–100W with humidifier.
Example: A 1,000Wh station runs a CPAP (no humidifier) for 17–33 hours.
D
DC (Direct Current) power
Power Type
The type of electricity stored in batteries. Your power station's battery stores DC power. The inverter converts it to AC power for standard appliances. USB ports and 12V car outlets output DC directly.
Example: Charging your phone via USB uses DC power directly — no conversion loss.
Depth of Discharge (DoD)
Battery
How much of a battery's total capacity is used before recharging. LFP batteries tolerate deeper discharge (80–100%) better than older chemistries.
Example: A 100% DoD means you fully empty the battery before recharging — acceptable for LFP, not ideal for NMC.
E
Efficiency (Inverter)
Performance
The percentage of stored battery energy that actually reaches your devices. The rest is lost as heat during conversion from DC to AC. Quality stations achieve 85–93% efficiency.
Example: An 85% efficient 1,000Wh station delivers ~850Wh of usable power to your devices.
Expandable
Feature
Stations that accept additional battery packs to increase total capacity. Allows you to start with a smaller station and add capacity later without buying a whole new unit.
Example: Jackery Explorer 1000 Plus (1,264Wh) expands to 5kWh with three extra batteries.
F
Fast Charging (X-Stream / HyperFlash)
Technology
Proprietary charging technology that dramatically reduces charge time. EcoFlow's X-Stream charges a 1,000Wh station to 80% in under 50 minutes. Anker's HyperFlash does 1,000Wh in about an hour.
Example: Without fast charging, a 1,000Wh station takes 5–8 hours to fill from a wall outlet.
G
Generator (Solar vs Gas)
Comparison
"Solar generator" is a marketing term for a portable power station plus solar panels. Unlike a gas generator, it produces no emissions, makes little to no noise, and is safe indoors.
Example: A gas generator runs at 65–80 dB; a solar generator runs silently.
H
Home Backup
Use Case
Using a power station to keep essential circuits (refrigerator, well pump, medical devices) running during a grid outage. Usually requires a transfer switch for safe connection to your home's electrical panel.
I
Inverter
Component
The component that converts DC power from the battery into AC power for standard appliances. Quality stations use pure sine wave inverters.
IP Rating (Ingress Protection)
Durability
A standard rating for dust and water resistance. The first digit (0–6) is dust protection; the second (0–9) is water protection. IP65 is dust-tight and protected against water jets. IP68 is dust-tight and protected against immersion.
Example: EcoFlow's 220W bifacial panel is IP68 — fully dust-tight and waterproof.
J
Jackery
Brand
The brand that pioneered consumer solar generators. Known for ease of use, SolarSaga panels, and excellent customer support. All Explorer 500+ models now use LFP chemistry.
K
kWh (Kilowatt-hour)
Capacity
1,000 watt-hours. Used for larger stations and whole-home systems. A 5kWh station stores 5,000Wh.
Example: The average US home consumes 30kWh per day.
L
LFP / LiFePO4 (Lithium Iron Phosphate)
Chemistry
The safest, longest-lasting lithium battery chemistry used in portable power stations. LFP batteries are rated for 3,000–6,000 cycles, are thermally stable, and have no risk of thermal runaway. Heavier than NMC, but the standard for quality stations in 2026.
Example: All Big 4 brands (EcoFlow, Jackery, Bluetti, Anker) now use LFP chemistry in their flagship models.
M
MC4 Connector
Solar
The industry-standard connector for solar panels. Universal across most brands except EcoFlow (proprietary XT60) and Jackery (DC8020). Using MC4 means you can mix solar panels from different manufacturers.
MPPT (Maximum Power Point Tracking)
Solar
A smart charge controller that continuously adjusts to extract the maximum possible power from your solar panels, regardless of cloud cover, panel angle, or temperature. All quality stations include MPPT — cheaper ones use less efficient PWM controllers.
Example: MPPT can harvest 10–30% more solar energy than PWM in real-world conditions.
N
NMC (Nickel Manganese Cobalt)
Chemistry
An older lithium battery chemistry. Higher energy density than LFP (lighter per Wh) but significantly shorter cycle life (500–800 cycles) and less thermal stability. Being phased out of portable power stations in favor of LFP.
Example: Most 2019–2022 power stations used NMC chemistry and began noticeably degrading after 2–3 years of daily use.
O
Overlanding
Use Case
Vehicle-based adventure travel focused on self-sufficiency. Power stations are essential for running fridges, charging devices, and powering camp setups without a noisy generator.
P
Pass-Through Charging
Feature
The ability to run devices from the station while simultaneously charging the station from a wall outlet or solar panel. Critical for continuous operation during outages.
Example: Run your refrigerator and charge your station from solar at the same time — the fridge never loses power.
Peak Sun Hours
Solar
The number of hours per day when sunlight is strong enough for meaningful solar charging. New Mexico averages 6–7 peak sun hours — among the highest in North America.
Example: A 200W panel in NM (6 peak hours × 200W × 0.85 efficiency) = ~1,000Wh per day.
Pure Sine Wave
Inverter
The highest quality AC output, identical to grid power. Safe for all electronics, including CPAP machines, laptops, and medical devices. All quality power stations use pure sine wave inverters.
Example: Cheap "modified sine wave" inverters can damage sensitive electronics over time.
Q
Qi Wireless Charging
Feature
Wireless charging pad built into some stations. Drop your phone on top to charge without cables. Common on Bluetti EB70S and some Anker models.
R
randomratchet
Personal / Catalyst
A person whose betrayal or mistreatment becomes the catalyst for profound personal transformation. Not someone to thank — but someone whose actions inadvertently force you to stop seeking validation externally, turn inward, and build something meaningful from the wreckage. The pain they caused becomes the fuel. The hurt becomes the foundation. And what you create in response becomes your proof that they didn't break you — they redirected you.
Example: ZiaVolt itself — built from the ashes of being done wrong, turning pain into purpose, and proving that the best revenge is building something real.
Runtime
Spec
How long a station can power a given device. Calculated as: (Station Wh × efficiency) ÷ device watts = hours of runtime.
Example: 1,000Wh station at 85% efficiency running a 50W CPAP: (1,000 × 0.85) ÷ 50 = 17 hours.
S
Solar Generator
Marketing
A marketing term for a portable power station bundled with solar panels. Not a generator in the traditional sense — no fuel, no moving engine parts.
Surge Wattage
Spec
The maximum power a station can deliver for a few seconds. Important for appliances with motors (refrigerators, well pumps, power tools) that draw 2–3× their running wattage on startup.
Example: A fridge that runs at 150W may need 600W for 1–2 seconds to start the compressor. Your station must handle the surge, not just the running watts.
T
Temperature Coefficient
Solar
How much a solar panel's output decreases as temperature rises. Expressed as %/°C. Lower numbers are better. A panel with -0.29%/°C loses less power on a hot day than one with -0.45%/°C.
Example: In New Mexico summer (panel temp 150°F / 65°C), a -0.45%/°C panel loses ~18% of rated output.
Thermal Runaway
Safety
A dangerous self-heating reaction that can cause battery fires. LFP chemistry is much less prone to thermal runaway than NMC/NCA. LFP's runaway threshold is 270°C vs. 150–210°C for other lithium chemistries.
Transfer Switch
Home Backup
A small sub-panel installed next to your main breaker panel. Isolates specific circuits (fridge, well pump, etc.) and allows you to power them from a portable station during outages. Required for safe, code-compliant home backup.
U
UPS (Uninterruptible Power Supply)
Feature
A mode where the station passes grid power through to your devices while keeping its battery topped off. When the grid fails, the station switches to battery in milliseconds — fast enough that your devices never notice the interruption. Critical for medical equipment and computers.
Example: EcoFlow Delta Pro 3 switches in 10ms; Anker F3800 switches in 20ms; both are fast enough for CPAP machines.
USB-C PD (Power Delivery)
Port
A fast-charging standard for USB-C ports. Delivers up to 100W (and up to 240W on newer 3.1 spec). Can charge laptops, tablets, and phones at full speed directly from the station's USB-C ports.
Example: A 100W USB-C PD port charges a MacBook Pro at full speed — no AC inverter needed.
V
Van Life
Use Case
Living and traveling in a converted van. A major use case for portable power stations — running a 12V fridge, lighting, device charging, and sometimes cooking appliances entirely off battery and solar.
Volt
Unit
A measure of electrical pressure. Most portable stations operate at 120V (standard US household voltage). Larger systems may support 240V for well pumps, dryers, and EV charging.
W
Watt
Unit
A measure of electrical power at a single moment. Your station's wattage rating tells you how much power it can deliver at once. A 2,000W station can run a 1,500W space heater plus 500W of other devices simultaneously.
Wh (Watt-hour)
Unit
A measure of total energy storage. The most important specification on any power station. Tells you how long the station will run your devices.
Example: A 500Wh station runs a 50W device for 10 hours; a 1,000Wh station runs the same device for 20 hours.
Whole-Home Backup
Use Case
Powering most or all circuits in your home during an outage. Requires large capacity (10kWh+), high output (7,000W+), and professional electrical integration via transfer switch or Smart Home Panel. The most expensive and capable tier of portable power.
Example: EcoFlow Delta Pro Ultra (6kWh–90kWh) and Anker SOLIX F3800 (3.8kWh–26.9kWh) are designed for whole-home backup.
X
X-Boost
Technology
EcoFlow's proprietary technology that allows a station to run appliances that exceed its rated wattage by temporarily reducing output voltage. Effective for resistive loads (heaters, kettles) but not recommended for sensitive electronics.
Example: A 2,400W Delta 2 can run a 3,400W appliance with X-Boost enabled.
X-Stream
Technology
EcoFlow's fast-charging technology. Charges compatible stations to 80% in under 50 minutes from a standard wall outlet — twice as fast as most competitors.
XT60 / XT60i Connector
Connector
EcoFlow's proprietary solar input connector. XT60i adds a "smart" pin that tells the station whether it's connected to solar or a car alternator.
Example: EcoFlow portable panels use XT60 connectors — third-party panels need an MC4 to XT60 adapter.
Y
Yield (Solar)
Term
The total energy produced by a solar panel over a given period, usually measured in watt-hours per day. Depends on panel wattage, peak sun hours, angle, temperature, and cleanliness.
Example: A 200W panel in New Mexico (6 peak sun hours) yields ~1,000Wh per day.
Z
ZiaVolt
Brand
The independent review site you're reading. Based in the high-desert Southwest, ZiaVolt tests portable power stations and solar gear in real New Mexico conditions — heat, dust, cold, and high altitude.
Still have questions?
The portable power industry is full of jargon, but you don't need to memorize every term. Focus on the three most important numbers: Wh (capacity), W (output), and cycle life. Everything else helps you compare, but those three tell you if a station will actually work for your needs.
Read: What is a portable power station? → Try the Calculator →