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Buying guides for energy & electrical gear

What to actually buy for home electrical and energy work. Every pick is grouped by the question it answers, with the trade-offs stated plainly, including who should not buy it.

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014 buying guides

EV charging

EV Chargers

Hardwired, plug-in and portable Level 2 chargers compared on output, connector, enclosure rating, load management and warranty, with the NACS transition and tight-panel options explained.

10 picks

EV Accessories

Outlet splitters, load-management devices and charging adapters, the hardware that solves real installation problems: no spare panel capacity, one outlet and two loads, or the wrong connector.

6 picks

OBD-II Adapters

The Bluetooth OBD-II adapters that battery-reading apps actually support, which ones work with an iPhone, and how to use one on a used EV before you buy.

3 picks

12 V Battery Tools

A flat 12-volt battery strands an EV with a full traction pack and stops an electric-start generator during an outage. Here are the jump packs and maintainers that fix and prevent it, and the battery-chemistry check to make before you buy.

4 picks

023 buying guides

Electrical

Electrical Testers

The testers worth owning for home electrical work (non-contact voltage pens, outlet testers, clamp meters and multimeters) and which one actually answers your question.

7 picks

Surge Protectors

Panel-mounted Type 2 SPDs, service-entrance Type 1 units and the point-of-use layer, compared on the numbers that matter: VPR, surge current rating and what the warranty actually requires.

6 picks

Outlets

Spec-grade duplexes, self-test GFCIs, USB-C receptacles and EV-rated NEMA 14-50s, where a few extra dollars per device buys contacts that stay tight for decades.

5 picks

035 buying guides

Backup power

Power Stations

Battery power stations from small camping units to whole-circuit home backup, compared on capacity, output, chemistry, cycle life and recharge options, with the sizing math to pick one that actually runs your loads.

9 picks

Portable Solar Panels

Folding solar panels a renter can set up on a balcony to recharge a portable power station, compared on the maker's own electrical ratings, connectors, weight and unfolded size. Off-grid, so nothing connects to the home's wiring.

3 picks

Outage Safety

The kit that stops a power outage turning dangerous (battery CO alarms, properly rated cords, a transfer switch that makes backfeeding impossible) plus the inlet box, 30 A cord, bonding plug and fuel stabilizer that finish the hookup and keep the generator starting.

8 picks

Inverter Generators

Portable inverter generators from 1,800 to 9,000 running watts, compared on running watts per fuel, 120 V vs 240 V outlets, CO auto-shutoff, parallel capability and run time, with the sizing math to pick the right class.

6 picks

RV Surge Protectors

Portable 30 A and 50 A RV surge protectors and electrical management systems that cut power on low or high voltage, open ground, open neutral and reverse polarity, with the maker's own thresholds, joule ratings and reconnect delays, and the generator bonding fix.

4 picks

044 buying guides

Home energy

Energy Monitors

The two ways to measure what an appliance really costs to run (a plug-in meter for anything with a cord, a whole-home monitor for hardwired and 240 V circuits) and which one answers your question.

2 picks

Air Quality Monitors

The instruments that tell you why a house feels stuffy, damp or dry (a true NDIR CO2 monitor, a logging hygrometer, and a multi-sensor monitor for cooking particulates and radon) and what each one cannot detect.

3 picks

Smart Thermostats

Smart thermostats that manage a heat pump's backup heat properly (outdoor-temperature aux lockout, early recovery, dual-fuel switchover) plus the line-voltage thermostat for electric baseboard heaters, and the wiring check to do first.

4 picks

Water Leak Detectors

Wi-Fi and hub-based water leak sensors for the water heater, washing machine, sump and under-sink spots, plus the automatic shutoff valve that stops the water, with each maker's battery life, alarm and range figures.

3 picks

Size it before you buy

The right charger, cord or generator depends on your circuit and your load. Check the numbers first.

Level 2 breaker sizeGenerator sizingHome electrical loadAll calculators