Guides — United States
Every guide answers its question in the first two sentences, dates every price, and names every source. 434 published, grouped into the questions buyers actually ask.
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Start with your question
What should I buy, and how do I not get cheated?
29 guides
FixesWhy is my inverter beeping?
5 guides
SystemsHow do I size it, and what changed with net billing?
86 guides
ElectricShould I go electric, and what will it really cost per km?
21 guides
MoneySchemes, instalments, loans — what can I actually get?
288 guides
ReportsWhat do the numbers say?
5 guides
All guides — page 10 of 19
Money
Schemes, instalments, loans — what can I actually get?
How Much Do Solar Panels Actually Save? 2026 Math
Solar savings are your offset consumption times your rate, minus what exports lose. The formula, the honest ranges at 2026 prices, and how to compute yours.
How to Calculate Solar Payback Period (Without Fooling Yourself)
Payback is one division problem wrapped in four assumptions. Do the arithmetic in ten minutes, then stress-test the assumptions — that is where proposals hide.
How to Claim the Solar Tax Credit on Form 5695 (Last Call)
2025 was the last year to earn the 30% solar credit — 2026 is when most people file for it. The Form 5695 walkthrough, extensions, amendments and carryovers.
Idaho Power Schedule 84 Commercial On Site Generation Guide
Idaho Power Schedule 84 customer on-site generation rules, single-meter net billing, Real-Time Market export credit valuations, and PUC order compliance.
Idaho Power Solar Interconnection And Engineering Guide
Idaho Power simplified distributed generator interconnection, secondary network restrictions, smart inverter volt-var curves, and inspection sign-off.
Illinois Comed And Ameren Part 466 Solar Interconnection Guide
How do Illinois Part 466 rules, smart inverter anti-islanding standards, and utility PTO approvals govern ComEd and Ameren solar interconnection?
Illinois EV Rebate: The 2026 Cycle Is Open — Full Guide
Illinois' EV rebate cycle opened August 1, 2026: $2,000 for new or used EVs, $4,000 for low-income applicants, through December 31. Caps and how to apply.
Illinois Net Metering And Illinois Shines REC Guide
How do Illinois solar installations and 3 kWh storage systems qualify for 30% Section 25D tax credits and comply with UL 1741-SB standards?
Illinois Shines Adjustable Block Program and SREC Guide
How Illinois Shines SRECs work. Learn 15-year REC delivery contracts, upfront incentive cash payments, equity adders, and federal tax credit stacking.
Indiana Aes And Nipsco Solar Interconnection Guide
How do AES Indiana and NIPSCO Level 1 simplified solar interconnection rules, technical reviews, and utility PTO approvals operate?
Indiana Excess Distributed Generation Edg And Tariff Guide
How do Section 25D federal tax credits and Indiana IURC Excess Distributed Generation (EDG) rules apply to residential clean energy systems?
Iowa IUC Inflow-Outflow Solar Net Metering Tariff Guide: 199 IAC Chapter 45 Interconnection Rules
Understand Iowa's 199 IAC Chapter 45 rules for solar interconnection and inflow-outflow net metering tariffs. This guide details application levels, f...
Iowa Utilities Commission 199 IAC 45.10 Level 3 Solar Interconnection Guide: Non-Exporting Systems
Guide to Iowa Utilities Commission 199 IAC 45.10 Level 3 solar interconnection: non-exporting systems, review timelines, and agreements (August 2026).
Iowa Utilities Commission 199 IAC 45.11 Level 4 Solar Interconnection Guide: Standard Study Process
Guide to Iowa Utilities Commission 199 IAC 45.11 Level 4 solar interconnection: standard studies, scoping meetings, and agreements (August 2026).
Iowa Utilities Commission 199 IAC 45.8: Level 1 Solar Interconnection Guide
Guide to Iowa Utilities Commission 199 IAC 45.8 Level 1 solar interconnection: 20 kVA limit, $125 fee, and 15% penetration screen (August 2026).
Iowa Utilities Commission 199 IAC 45.9: Level 2 Solar Interconnection Guide
Guide to Iowa Utilities Commission 199 IAC 45.9 Level 2 solar interconnection: 2 MVA unit limit, technical screens, and review rules (August 2026).
Is the Solar Tax Credit Refundable? Liability, Refunds, Carryover
The solar credit is nonrefundable — it cannot exceed the tax you owe. Why your refund can still grow, how carryforward rescues the rest, and the 2026 wrinkle.
Kansas Evergy Schedule EGS: Parallel Generation and Solar Interconnection Guide
Understand Kansas K.S.A. 66-1,184 and Evergy's Schedule EGS for parallel generation, including interconnection, compensation, and system sizing.
Kansas Evergy Solar Interconnection and Safety Standards Guide
Guide to Kansas Evergy solar interconnection rules, application timelines, safety standards, and manual disconnect requirements under state statutes.
Kentucky PSC Net Metering Rules: Rider NMS Guide
Understand Kentucky's PSC net metering rules, including the 45 kW capacity limit, Level 1 interconnection requirements, and the differences between Ri...
LG&E and KU Rider NMS-2 Net Metering Tariff and Interconnection Guide
Understand LG&E and KU Rider NMS-2 net metering tariff mechanics, including two-channel metering, avoided-cost compensation, and Level 1 interconnecti...
Louisiana Entergy And Cleco Solar Interconnection Guide
How do IEEE 1547 and UL 1741 certification rules and IRS tax credit standards apply to Entergy Louisiana and Cleco Power solar projects?
Louisiana Psc Solar Net Metering And Billing Guide
How do Louisiana Public Service Commission (LPSC) avoided-cost billing rules and federal clean energy tax credits apply to rooftop solar?
Maine Central Maine Power and Versant Power Solar Net Energy Billing Guide
A guide to Maine's Net Energy Billing rules for solar customers of Central Maine Power and Versant Power, covering system size, billing, and credit policies.