Solar energy, explained honestly

Guide

How to choose a solar power system for your home: 6 steps

From your electricity bill to the final equipment list: calculate consumption, size the system, check the roof and avoid the classic mistakes.

Read → Economics

Is solar worth it in southern Russia? An honest calculation

2,200+ sun hours, 1,250 kWh per installed kilowatt: what that means in money for a home and for a business, and why winter and hail are…

Read → Technology

Grid-tied, hybrid or off-grid: which solar system to choose

Three architectures, one decision: what each type does during an outage, what it costs, and which one fits your site.

Read → Regulation

Selling surplus solar power to the grid in Russia: how microgeneration works

Systems up to 15 kW may sell their surplus to the utility. What the law allows, how to register, and what it pays in practice.

Read → Sizing

How many solar panels does a house need: worked examples

A three-step method plus ready answers: 6–7 panels for a 100 m² home, 8–10 for 150 m², 11–14 for 200 m² — and the roof area…

Read → Operation

Solar panels in winter and cloudy weather: real output

Winter is a third of June's daily yield — not zero. What clouds and snow really do, and how each system type handles the dark months.

Read → Technology

Mono vs poly solar panels — and why TOPCon is the real question

The mono-vs-poly debate is over — mono won. The real 2026 question is the generation of mono: PERC or TOPCon N-type.

Read → Equipment

How to choose a solar inverter: a practical guide

Panels decide how much energy you harvest; the inverter decides how much reaches your sockets. Five questions to answer before buying.

Read → Equipment

Solar batteries: LiFePO4 vs gel — the honest arithmetic

Compare price per lifetime kilowatt-hour, not price per box: LFP delivers roughly ten times more energy over its life at 2–2.5× the cost.

Read → Installation

Installing solar panels on a roof: how it is done properly

Panels live 30 years — their mounting must too. Fastening by roof type, ballasted flat-roof systems, wind zones and the installer mistakes to watch for.

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