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Earth Energy Log
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United States

Every Earth Energy Log article covering renewable energy in United States — solar manufacturing, wind, BESS tenders, hydrogen, and policy. Tracked, reviewed, and refreshed quarterly.

35 articles

solar·

Top US solar manufacturers ranked 2026: First Solar, Qcells, Silfab, and the chasers

The top US solar manufacturers in 2026 are led by First Solar (~11 GW nameplate CdTe) and Qcells (~8.4 GW integrated cell+module), with Silfab, Mission Solar, Heliene, and Meyer Burger as the next tier. This guide ranks the top US solar manufacturers by 2026 nameplate capacity, cell vs. module integration, IRA 45X positioning, and domestic-content bonus eligibility — the metrics that determine which US solar manufacturers win.

solar·

Solar turbines explained 2026: CSP, Solar Turbines Inc., and where turbines actually fit in solar

Solar turbines is a confusing search term. There's Solar Turbines Inc. — a Caterpillar subsidiary that makes industrial gas turbines, not solar. And there are steam turbines inside concentrated solar power (CSP) plants — the only place real solar turbines exist. This guide disambiguates, walks through US CSP operating plants and their economics, and explains why CSP remains a marginal slice of the US solar mix in 2026.

solar·

Solar system US 2026: a buyer's guide to sizing, costs, and what's actually in the box

A solar system in the US in 2026 typically costs $2.50–$3.50 per watt installed for residential, with the average homeowner buying an 8.4 kW system for around $24,000 pre-incentive. This buyer's guide walks through how to size a solar system to your actual electricity bill, what each component of a residential solar system does, and how to read an installer quote without getting talked into oversized hardware.

solar·

Solar roof US 2026 comparison: Tesla, GAF Energy, and panels-on-rails — what to buy

A solar roof (integrated photovoltaic shingles or laminated metal) costs $4.50–$7.00 per watt in the US in 2026 — roughly 2x a standard solar panel install. Tesla Solar Roof, GAF Energy Timberline Solar, and a handful of competing systems lead the category. This guide compares the leading solar roof products, walks through when one actually beats standard panels, and shows the real installed cost math.

solarfinance·

Solar roof financing US 2026: loans, leases, PPAs, and the real monthly payment

A solar roof in the US in 2026 costs $4.50–$7.00 per watt installed — roughly 2x standard panels. Financing through a $40,000–$60,000 solar roof loan at 6.5–9.5% APR over 15 years runs $310–$480 per month before incentives. After the 30% federal ITC and bill savings, net monthly cost typically falls $100–$220/month. This guide compares solar roof loans, leases, PPAs, and the real net cost.

solarfinance·

Solar panel price forecast 2026-2030: where US prices are headed

US solar panel prices through 2030 will likely stay roughly flat at $2.40–$3.50 per watt installed for residential and $0.85–$1.10 per watt for utility-scale. Module commodity deflation continues at 3–5% per year, offset by labor inflation of 6–10% per year and rising domestic-content premium. This forecast covers the US solar panel price trajectory by segment, the upside and downside scenarios, and what could change the trajectory.

solarfinance·

Solar panel price by US state 2026: where you'll pay more and where you'll pay less

Solar panel prices in the US in 2026 vary significantly by state — from $2.40/W in Arizona and Texas to $3.70/W in New York and Massachusetts. State-level differences are driven mostly by labor cost, permitting friction, utility interconnection complexity, and competitive installer density — not by sunshine. This guide ranks US states by 2026 installed solar panel price with the underlying drivers.

solar·

Solar panel cleaning in the US 2026: a homeowner's guide to costs, schedules, and DIY vs. pro

Solar panel cleaning in the US in 2026 costs $150–$400 per residential visit, with frequency ranging from once per year in rainy climates to four times per year in the desert Southwest. This guide covers when solar panel cleaning actually pays back, regional schedules, what to ask a service company, DIY methods that don't void your warranty, and how soiling losses affect annual production.

solar·

Solar panel cleaning equipment 2026: the gear US homeowners actually need

DIY solar panel cleaning equipment for a US homeowner in 2026 costs $30–$150 in one-time gear: a soft-bristle brush on a telescoping pole, a deionized water filter (or distilled water), and a safe access setup. This guide covers what solar panel cleaning equipment you actually need, what's optional, what's overrated, and what to avoid (pressure washers and abrasive brushes that void module warranties).

solar·

Solar panel cleaning cost calculator US 2026: when it actually pays back

A solar panel cleaning visit in the US in 2026 costs $150–$400 for residential. The math on whether it pays back depends on your climate, system size, and electricity rate. This guide gives you the calculator: estimated annual soiling loss × system size × electricity rate vs. cleaning service cost. Plus 2026 regional cost guides, frequency recommendations, and the line where cleaning stops being economic.

solarfinance·

Solar farm land leasing US 2026: should you lease your land for a solar farm?

A US solar farm land lease in 2026 typically pays the landowner $800–$2,500 per acre per year for a 30–40 year term, with annual escalators of 1.5–2.5%. For a 600-acre lease, that's $480,000–$1.5M per year of largely passive income. This guide covers what a solar farm land lease offer should include, how to evaluate solar farm developers, tax and estate implications, and the risks of locking up land for 35+ years.

besssolar·

Solar battery brands US 2026: top residential storage ranked

The top solar battery brands for US residential storage in 2026 are Tesla Powerwall 3, Enphase IQ Battery 10C, Franklin WH aPower 2, and Generac PWRcell 2. Battery costs range from $11,000–$16,000 installed for a 13.5 kWh single unit. This guide ranks the top US residential solar battery brands by share, capacity, chemistry, warranty, and use case, with pricing and integration notes.

solarbess·

Off-grid solar system US 2026: when it makes sense and what it actually costs

An off-grid solar system in the US in 2026 typically costs $25,000–$60,000 for a small cabin and $80,000–$200,000 for a full-time home — roughly 3–5x the cost of a comparable grid-tied solar system. This guide covers when off-grid actually makes economic sense, sizing methodology, battery and backup generator requirements, and the components that distinguish an off-grid solar system from grid-tied.

solar·

The largest solar farms in the US 2026: top 10 ranked by capacity

The largest US solar farms in 2026 sit in the 700 MW–1.5 GW range, dominated by Texas, California, and Nevada projects. This guide ranks the top 10 largest operating solar farms in the US by AC capacity, with developer, year of commercial operation, technology choice, and offtake structure for each. Plus a preview of the gigawatt-scale solar farm projects coming online in 2027–2028.

solarfinance·

How to build a solar farm in the US 2026: a step-by-step development guide

Building a solar farm in the US in 2026 is a 3–6 year project that runs through 8 distinct phases: site identification, land control, interconnection queue, permitting, offtake, financing, construction, and commercial operation. This guide walks through every phase of solar farm development with the working timelines, costs, and decision points that determine whether a solar farm actually gets built.

solar·

DIY solar installation US 2026: legal, practical, and warranty risks of doing it yourself

A DIY solar installation in the US in 2026 can save 30–45% off professional installer pricing — but voids most module and inverter warranties, complicates utility interconnection, and often fails initial inspection. This guide covers what's legal in your state, what skills you actually need, the hidden costs that erase most DIY savings, and when DIY solar installation makes sense vs. when it doesn't.

solarfinance·

Commercial solar installation US 2026: pricing, timelines, and ROI for businesses

A commercial solar installation in the US in 2026 costs $1.50–$2.40 per watt installed, with project timelines of 6–18 months depending on scale. After the 30% ITC, 10% domestic-content adder, and MACRS accelerated depreciation, effective net cost drops 50–60% for a typical corporate buyer. This guide walks through commercial solar installation economics, timelines, contract structures, and how to evaluate proposals.

solarinverter·

Best solar inverter for US homes 2026: residential brands ranked

The best solar inverter for a US home in 2026 depends on roof complexity, budget, and battery plans. Enphase IQ8 microinverters dominate residential market share (~45-50%); SolarEdge DC-optimizer systems hold ~25-30%; Tesla, Generac, and Franklin WH lead hybrid + battery integration. This guide ranks the top US residential solar inverter brands with 2026 prices, warranties, sizing guidance, and use-case fit.

solarfinance·

Top companies in the solar industry in the US 2026: who leads by layer

The top companies in the solar industry in the US in 2026 split across four layers: module manufacturing (First Solar, Qcells, Silfab), residential installation (Sunrun, Sunnova, Freedom Forever), utility-scale development (NextEra, Invenergy, AES, Lightsource bp), and inverters (Enphase, SolarEdge). This guide ranks the top US solar companies in each layer with 2026 share, footprint, and what makes them win.

solar·

Solar installation in the US 2026: a homeowner's step-by-step guide

A US residential solar installation in 2026 takes 6–14 weeks from signed contract to permission-to-operate, costs $2.50–$3.50 per watt before incentives, and follows seven well-defined phases. This guide walks through each phase of solar installation, what to look for in installer quotes, common pitfalls, and how the 30% federal tax credit changes the math.

wind·

US offshore wind 2026: the post-cancellation rebuild and what got reset

US offshore wind faced major setbacks in 2023-2024 with multiple project cancellations (Ørsted Ocean Wind, Avangrid Park City, others) over cost overruns and PPA mismatches. By Q1 2026, 4 GW operational (Vineyard Wind 1, South Fork, Revolution Wind partial), 5 GW under construction. New project rebids at $130-160/MWh tariffs. This deep-dive covers what got cancelled and why, the rebuild mechanism, supply chain + political risks, and the realistic 2030 outlook.

bess·

Data center renewable energy 2026: 24/7 CFE, the AI demand surge, and the firmness problem

Data center electricity demand grew 12% in 2025 driven by AI workloads. Hyperscalers (Google, Microsoft, AWS, Meta) committed to 24/7 carbon-free energy by 2030 but face a firmness problem — solar+wind alone can't deliver continuous match. Solutions emerging: long-duration storage, geothermal contracts, nuclear PPAs, hourly carbon-matched procurement. This deep-dive covers the demand surge, the 24/7 CFE challenge, the nuclear pivot, and what it means for the renewable industry.

inverter·

Microinverters in 2026: where module-level wins

Microinverters retain 18% of US residential inverter shipments and lower shares in Europe and India. Enphase dominates with 90%+ US share. The technology wins on shading tolerance, partial-string failures, and rapid shutdown compliance — but the per-watt premium of 15–25% limits adoption to specific use cases.

bess·

Long-duration energy storage 2026: 4-hour vs 8-hour and beyond

4-hour battery storage dominates new utility-scale installations at 78% in 2026; 8-hour systems remain niche at 12%, economic only where evening peaks are long, capacity payments reward duration, or grid-forming is mandated. Beyond lithium, emerging long-duration technologies (flow, iron-air, thermal) target 10-100+ hours. This guide explains the duration mix, when long-duration wins, the new technologies, and what to watch.

bess·

CAISO crosses 15 GW of battery storage capacity: market lessons

California Independent System Operator (CAISO) crossed 15 GW of operational battery storage in Q2 2026 — up from 11 GW one year ago. Storage now supplies 18% of evening peak load on summer days. Market structure has caught up: BESS resources earn from energy, ancillary services, and resource adequacy concurrently.

bess·

Storage as transmission alternative: when BESS beats wires

Battery energy storage deployed as a transmission alternative — relieving congestion or deferring substation upgrades — is gaining regulatory acceptance in CAISO, ERCOT, and PJM. Where BESS can substitute for transmission investment, project economics often dominate wires-only alternatives by 30–60% over 20-year planning horizons.