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Buying guides & research
Our buying guides are produced by the editorial team. We compare market prices, cross-check manufacturer and standards data and verified customer reviews, and — where we say so explicitly — test devices ourselves, with our own photos and measurements. Links marked (*) are affiliate links; purchases help fund our work without influencing our recommendations.
12V or 24V for a 2000W inverter? We compare current draw (~170A vs ~85A), cable gauge, cost and efficiency — and when 12V is fine vs. when 24V is the clearly better choice.
May 28, 2026
How much battery for a PSPS outage? Shutoffs run 24–72 hours. We size it by load — fridge (~1–2 kWh/day), essentials, whole-home — and explain why solar recharge matters for multi-day outages.
May 28, 2026
What cable size for a 2000W inverter? At 12V the real draw is ~180–200A — we show why 1/0 AWG is the bare minimum (2/0 AWG is safer), how to size the fuse and voltage drop, and how to avoid cable fires.
May 28, 2026
MPPT or PWM? We explain the difference, the efficiency (PWM roughly ~70% vs. MPPT up to ~98%) and when the pricier MPPT controller is worth it — including the important V_OC × 1.25 sizing rule.
May 28, 2026
NEM 3.0 explained: California's Net Billing Tariff (since 2023) pays roughly $0.05/kWh for exported solar but charges up to ~$0.60 at peak. We break down what changed and why a battery now makes the difference.
May 28, 2026
My 2000W DIY solar setup with LiFePO4 battery, MPPT charge controller and a 400 W foldable panel — built for expandable capacity and more kWh per dollar as you scale, not for beating a pre-built on a 2 kWh sticker price. Complete bill of materials, step-by-step wiring, and a side-by-side with EcoFlow DELTA Pro and Jackery Explorer 2000 v2.
May 21, 2026
How my ~$1,800 portable home battery setup works with California's NEM 3.0 export rates, shifts evening Time-of-Use peak usage off the grid, and provides essential-load backup during PSPS outages — without an electrician or utility paperwork.
May 21, 2026
The best 3D printers under $500 for US buyers in 2026: Bambu Lab A1, A1 Mini, Elegoo Centauri Carbon and Creality K1C compared, with picks and prices.
Apr 25, 2026
The best budget smartphones in the US for 2026: Google Pixel 10a (7 years of updates), Samsung Galaxy A57 and A56 5G (6 years), Nothing Phone (4a) Pro, and Moto G (2026) compared — with update policy as the central buying criterion.
Apr 22, 2026
The best air fryers in the US for 2026: Ninja Air Fryer Pro 4-in-1 (Tom's Guide best overall), Instant Vortex Plus, COSORI TurboBlaze, Dash Tasti-Crisp and Cuisinart compared — with countertop sizing for US kitchens and 120 V wattage notes.
Apr 22, 2026
The best espresso machines in the US for 2026: De'Longhi La Specialista Opera, Breville Bambino, Breville Oracle Jet and Gaggia Classic compared — with cost per cup as the buying argument.
Apr 22, 2026
The best robot vacuums in the US for 2026: Shark PowerDetect, Roborock Saros 20, Ecovacs Deebot N20 Pro and Roborock Qrevo Curv 2 Pro compared — with the dock as the deciding factor.
Apr 22, 2026