Buyer's guides
Comparison-led guides for every category we cover. Each one ranks our picks, explains why, and tells you which model to skip.
mini splits
9,000 vs 12,000 BTU Mini Split: Sizing a 400 Sq Ft Room in a Hot Climate
9,000 or 12,000 BTU for a 400 sq ft room? The rules of thumb, the hot-climate adjustment, and why a modestly oversized inverter unit beats an undersized one.
mini splits
Do Any Mini Splits Plug Into a Wall Outlet? 115V vs 230V, Explained
No mini split plugs into a standard wall outlet. What 115V vs 230V actually changes, why every unit needs a dedicated circuit, and what the electrician will install.
mini splits
Mini Split Freezing Up: What It Means and Whether to Repair or Replace
A mini split freezing up usually means a refrigerant leak, blocked airflow, or a bad sensor. How to tell which, what ice is normal, and when replacement beats repair.
mini splits
MRCOOL DIY vs Daikin Oterra: The Self-Install Warranty Trap
Self-installing a Daikin mini split can void its 12-year warranty. MRCOOL DIY exists because of that rule. The real warranty terms, reliability record, and the math.
mini splits
Where to Buy a Daikin Mini Split (Without Losing the 12-Year Warranty)
Where to buy a Daikin mini split online: verified prices for the Oterra 12K at six retailers, plus the warranty rule that decides how you should buy it.
van rv
Best RV Battery 2026
The best 12V LiFePO4 RV batteries for 2026, from budget 100Ah picks to a 200Ah option and a self-heating model, with capacity, BMS, and price per kWh.
van rv
Best RV Inverter 2026
The best RV inverters for 2026, from budget 1200W pure sine units to 3000W and inverter/chargers, with continuous watts, surge ratings, and who each suits.
components
Best Solar Inverters & All-in-One Systems 2026
The best solar inverters for 2026, from budget off-grid units to whole-home hybrids, with continuous output, MPPT count, warranty, and who each suits.
components
MPPT vs PWM Charge Controllers 2026: Which to Buy
MPPT vs PWM solar charge controllers in 2026: the real difference, how much more energy MPPT harvests, when each makes sense, and the best controllers to buy.
components
Best LiFePO4 Batteries for Off-Grid Solar 2026
The best LiFePO4 batteries for off-grid solar in 2026, from 48V server-rack banks to 12V RV batteries, with capacity, price per kWh, and who each suits.
off grid
Best Off-Grid Solar Kits 2026: Homes, Cabins & Homesteads
The best off-grid solar kits for 2026 for homes, cabins, and homesteads, from plug-and-play all-in-one systems to budget DIY component kits, with specs and who each suits.
van rv
Best RV Solar Panels & Kits 2026
The best RV solar panels and kits for 2026, from full roof-mount kits to single panels, portable solar, and LiFePO4 batteries, with specs and who each is for.
off grid
How Many Solar Panels to Run a House (and a Refrigerator) 2026
How many solar panels it takes to run a refrigerator, your essentials, or a whole house off-grid in 2026, with worked examples and a free sizing calculator.
home backup
Best Home Battery Backup Systems for Power Outages (2026)
The best home battery backup systems to ride out a power outage, from plug-and-play power stations to whole-home all-in-one inverters.
home backup
Best Portable Power Station 2026: Picks for Home Backup, RV & Camping
The best portable power stations for home backup, RVs, and camping in 2026, from compact units to 4 kWh machines, with capacity, output, and who each is for.
home backup
Best Solar Generator for Home Backup 2026
The best solar generators for home backup in 2026, station-plus-panel kits from EcoFlow, Jackery, Bluetti, and Anker, with capacity, output, and who each suits.
home backup
EcoFlow vs Bluetti vs Jackery 2026: Which Power Station Brand to Buy
EcoFlow vs Bluetti vs Jackery in 2026: how the big three power station brands compare on app, capacity, weight, and value, and which to buy for your needs.
off grid
How Many Solar Panels & Batteries Do You Need? Off-Grid & Backup Sizing (2026)
How many solar panels and batteries do you need? Size your battery bank, solar array, charge controller, and inverter, plus a free off-grid solar calculator.