Guides and explainers that go deeper than the calculators. New articles are added regularly.
How much panels lose per year, what causes it, and how much power is left after 25 years — with a real 8-year field measurement.
Read guide → GuideWhat Voc, Vmp, Isc, Imp, Pmax, STC and the temperature coefficients mean — and how to design a safe system from them.
Read guide → Real exampleComponents, production, cost and payback for a real 5kW family-home system in Jordan.
Read guide → Real exampleExact components, production, cost breakdown and payback for a real 3kW rooftop system.
Read guide →The full picture: how off-grid systems work, the five core components, and a step-by-step sizing path with a calculator for each stage.
Read guide →The full sizing chain — array, battery, inverter, charge controller, strings, and cables — with a calculator for every step.
Read guide →Every maintenance routine and troubleshooting walkthrough in one place — cleaning, inspection, testing, fault codes, and fixes.
Read guide →Why heat cuts panel output, how the temperature coefficient works, and practical steps to keep production high in hot, dusty regions.
Read guide →How current, distance, and voltage drop decide your cable size — with a real field example and a worked calculation.
Read guide →How tilt affects output, the best angle for your latitude, and how it changes between summer and winter — with a calculator.
Read guide →What peak sun hours really mean, why they aren't the same as daylight hours, typical values by region, and how to turn them into an energy estimate.
Read guide →How the two charge controller types work, why MPPT harvests 15–30% more energy, and when a simple, cheaper PWM controller is still the right choice.
Read guide →A realistic look at what a 100W panel actually powers — lights, chargers, a fan — how much energy it makes a day, and why you need a battery.
Read guide →How much output drops under cloud, why cold weather actually helps efficiency, and why short winter days still cut total production.
Read guide →Lithium vs lead-acid lifespan in years and cycles, what wears batteries out, and practical ways to get more years from your bank.
Read guide →A practical guide with the simple formula, a worked example, and how location and panel wattage change the count.
Read guide →The full explainer behind our panel calculator — formulas, assumptions, and a worked example.
Read guide →Running watts, starting surge, and why sine wave type matters — the full guide behind our inverter calculator.
Read guide →Depth of discharge, cycle life, and a full worked example — the guide behind our battery calculator.
Read guide →The formula, standard cable sizes, and a worked example — the guide behind our cable calculator.
Read guide →How payback period and 25-year savings are calculated — the guide behind our ROI calculator.
Read guide →How the three main system types differ, what each costs, and how to decide between them.
Read guide →Degradation rates, what shortens panel life, and what really happens after the 25-year warranty ends.
Read guide →How often to clean panels, safe methods, and when to call a professional instead of DIY.
Read guide →Undersized inverters, wrong cable sizing, and other avoidable mistakes from real installations.
Read guide →The formula behind controller amperage, and a full comparison of both controller types — the guide behind our charge controller calculator.
Read guide →A step-by-step field guide to checking open-circuit voltage, short-circuit current, and spotting a failing panel.
Read guide →Why grounding matters for solar PV systems, what commonly goes wrong, and how to inspect it in the field.
Read guide →What common inverter fault categories mean, what usually causes them, and what to check before calling for support.
Read guide →What to verify before you flip the switch on a new solar installation for the first time.
Read guide →A yearly systematic pass over connections, cables, grounding, and overall performance.
Read guide →Your bill holds the most important number in solar design — your kWh usage. Find it, decode fixed vs variable charges and tariff tiers, track 12-month patterns, and size your system — with a Jordan-specific section (JEPCO, IDECO, EDCO).
Read guide →How the bidirectional meter banks your surplus as bill credits, net metering vs net billing vs feed-in tariffs, how the rules differ by region in 2026, and how the compensation model should change your system size and battery decision.
Read guide →DC vs AC pumps, direct-drive vs battery-free systems, how to turn your pump's head and flow into a panel count, why water storage beats batteries, and real 2026 costs for homestead and irrigation systems.
Read guide →The five cost blocks of every solar quote, real 2026 prices for 3 kW, 5 kW and 10 kW systems, what batteries and hybrid inverters add, the five line items that expose an inflated quote, and payback math at current prices.
Read guide →String, micro, hybrid and off-grid inverters compared with real 2026 prices, DC-to-AC sizing math, MPPT count, efficiency curves, IP rating, warranty checks, and the red flags that expose a bad quote.
Read guide →How to size a battery bank from your real nightly load, lithium vs lead-acid vs gel on usable depth and cycle life, what heat does to every chemistry, BMS essentials, and the five checks that expose a bad battery quote.
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