Solar Guides
Practical guides for DIY solar installation — from string sizing to equipment compatibility.
InvertersBeginnerTechnology
Adding a Battery to Existing Solar (AC vs DC)
Already have grid-tied solar? Add battery backup for blackouts — AC vs DC coupling, when to replace your inverter, 2026 costs, and how much battery you need.
14 min6/7/2026
InvertersIntermediateTechnology
How MPPT Works: Algorithms and PWM Comparison
See how an MPPT controller finds the maximum power point, which tracking algorithms it uses, and why it harvests 10–30% more energy than PWM.
18 min5/28/2026
SafetyBeginnerStandards
Solar Fuses and Breakers: DC and AC Sizing Guide
Size DC string fuses and AC breakers safely. Learn NEC 690.9 and IEC 62548 rules, gPV vs gG types, breaking capacity, and avoid common mistakes.
13 min5/25/2026
TechnologyInvertersBeginnerSafety
Cloud-Edge Effect: Why Solar Panels Exceed Rated Power
Cloud edges briefly push irradiance to 1200 W/m², so panels output above nameplate. What it means for clipping, fuses, and inverter sizing.
13 min4/29/2026
InvertersIntermediatePerformance
Inverter Clipping: How Much Energy You Really Lose
Inverter clipping explained: annual losses by DC/AC ratio, when it pays off, and when it hurts. Worked example: 14.7 kWp on an 8 kW Deye hybrid in Kyiv.
13 min4/29/2026
InvertersBeginnerTechnology
Microinverters vs String Inverters: 2026 Complete Guide
Microinverter vs string inverter compared in 2026: cost per watt, shading, NEC 690.12, batteries, and which technology fits your roof.
14 min4/25/2026
TechnologyBeginnerTemperature
NOCT vs STC: Real-World Solar Panel Performance
Understand why a 580W panel delivers around 440W in real conditions. Learn what STC and NOCT mean, the 75% performance gap, and how to read both.
13 min4/18/2026
SafetyTechnologyBeginner
LiFePO4 Cell Terminals: Types, Torque, Internal Resistance
DIY guide: four terminal types on prismatic LiFePO4 cells, M4–M8 torque specs, measuring internal resistance with YR1035+, and EVE vs CATL vs REPT compared.
20 min4/17/2026
BeginnerSafetyStandards
MC4 Solar Connectors: Types, Brands & Selection
Guide to MC4 solar connectors. Top 5 brands vs Chinese clones, connector types, crimping tools, and how to choose the right connectors for your panels.
14 min4/13/2026
BeginnerSafetyTechnology
Solar Battery Sizing Guide for Hybrid & Off-Grid (2026)
Calculate the right battery capacity for your hybrid or off-grid solar system. Formulas, DoD math, real inverter pairings, common mistakes.
14 min4/11/2026
TechnologyBeginnerTemperature
Most Efficient Solar Panels 2026 — Top 15 Rankings
Compare the 15 most efficient solar panels of 2026 — TOPCon, HJT, ABC, IBC. Real datasheet specs, temperature losses, warranty + $/W analysis.
18 min3/31/2026
BeginnerString SizingSafety
Ground-Mounted vs Rooftop Solar Panels
Compare ground-mounted and rooftop solar: cost, efficiency, string sizing, and voltage drop. Find the best mounting option for your home.
14 min3/30/2026
BeginnerTechnologySafety
Solar Panel Shading: How It Affects Your String
Learn how partial shading reduces solar string output, how bypass diodes work, and practical solutions to minimize power loss.
13 min3/24/2026
TechnologyBeginner
Solar Panel Degradation Rate Explained
Learn how fast solar panels degrade, compare PERC vs TOPCon vs HJT lifespan, and see year-by-year power output projections over 30 years.
13 min3/22/2026
TechnologyBeginner
Bifacial Solar Panels: Complete Guide to Dual-Sided Generation
How bifacial panels work, why shading only matters on the front side, and how much extra energy the rear side delivers. Real-world examples and formulas.
13 min3/21/2026
BeginnerTechnology
Solar Panel Datasheet: Every Spec Explained
Learn what Voc, Vmpp, Isc, Impp, Pmax, and temperature coefficients mean on a solar panel datasheet — and why each one matters for your installation.
14 min3/21/2026
String SizingInvertersBeginner
How to Distribute Panels Across MPPT Inputs
Learn when to use one MPPT vs two, how to split east/west panels, handle unequal strings, and avoid morning startup issues — with a worked example.
14 min3/21/2026
InvertersBeginnerSafety
Solar Panel Oversizing Guide: DC/AC Ratio Limits
When can you oversize solar panels on an inverter? Safe DC/AC ratios (1.3–2.0), clipping losses, voltage trap — explained with a real calculation example.
13 min3/21/2026
SafetyBeginner
Solar Cable Sizing: PV Wire Gauge & Voltage Drop Guide
Choose the right solar and PV cable: wire gauge by current, voltage drop formula, MC4 connectors, and DC/AC conduit rules — with worked examples.
12 min3/21/2026
InvertersBeginner
On-Grid vs Hybrid vs Off-Grid Inverters (2026)
On-grid, hybrid and off-grid solar inverters compared: battery support, blackout backup, cost, ROI. Find the right type for grid-tied or remote setups.
12 min3/21/2026
TechnologyBeginner
Best Solar Panel Brands 2026: 8 Tier-1 Compared
LONGi, JinkoSolar, Trina, JA Solar, Canadian Solar and 3 more — compared on efficiency, warranty, price and reliability. Pick the right brand for your setup.
12 min3/21/2026
String SizingBeginnerSafety
How to Replace Discontinued Solar Panels in an Existing String
A practical guide to finding compatible replacement panels when the originals are discontinued. Learn which specs must match and how to verify compatibility.
12 min3/20/2026
TechnologyString Sizing
HJT Solar Panels: How Heterojunction Changes String Sizing
Learn how HJT panels' superior temperature coefficient fits more panels per string. Worked examples comparing HJT vs TOPCon vs PERC setups.
13 min3/19/2026
InvertersBeginnerString Sizing
How to Choose an Inverter for Your Solar Panels
Learn how to choose the right solar inverter: voltage and current compatibility, DC/AC ratio, MPPT sizing, and a step-by-step checklist with a worked example.
15 min3/19/2026
String SizingBeginnerSafety
Solar Panel String Sizing: A Complete Beginner's Guide
Learn how to calculate the right number of solar panels per string. Covers voltage limits, temperature effects, MPPT range, and common mistakes.
16 min3/18/2026
TemperatureBeginnerSafety
Solar Panel Temperature Coefficient Guide 2026
How temperature changes solar panel voltage and power: cold boosts Voc, heat drops Pmax. Calculate string size for your climate with worked examples.
11 min3/18/2026
TechnologyBeginner
PERC vs TOPCon vs HJT Solar Panels (2026 Guide)
PERC, TOPCon and HJT compared head-to-head: efficiency, temp coefficient, degradation and price. See which cell tech wins in 2026 — with real datasheet numbers.
12 min3/18/2026
String SizingBeginnerSafety
Solar Panel Wiring: Series vs Parallel Explained
Learn when to wire solar panels in series, parallel, or both. Includes voltage and current formulas, a worked example, and a free compatibility calculator.
14 min3/18/2026
TechnologyBeginner
Solar Panel Cell Count: 60, 72, 120, 144 Cells Compared
How many cells does a solar panel have? Compare 36, 60, 72, 120, and 144-cell panels — voltage, power, size, and which cell count fits your project.
12 min3/18/2026