ENERTIA · Knowledge Base
Guides, company news, and project descriptions. Stay up-to-date with the electrical industry — jargon-free and to the point.
Before calling anyone, check three things. This simple guide tells you when the network operator will fix the problem, when the building administrator is responsible, and when an electrician is needed.
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Lightning doesn't have to strike your home to take out your inverter, TV, and boiler motherboard. We explain how surge protection really works, why a power strip isn't enough, and what to check after every major storm.
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A loose connection in the switchgear heats up for weeks before it shuts down a plant – and all that time it's perfectly visible on a thermal camera. What the inspection looks like, what it most often finds, and how to read the report.
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On many companies' distribution bills, an item appears every month that few understand – the charge for reactive power. We explain where it comes from, how to find it, and why it's one of the fastest-returning investments in a company's electrical system.
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A well-prepared five-year inspection takes less time, costs less, and doesn't come back for a 'second appointment' for half a year. A specific list of things to prepare – to print and tick off, with a PDF file to download.
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More and more often, it's not apartment owners calling us, but their adult children. This guide is for them: seven things worth checking in parents' homes – and how to arrange an electrician's visit remotely.
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Residual current devices and overcurrent protection trip for different reasons – and indicate different problems. How to distinguish them, what to check yourself, and when it's a job for an electrician with a meter.
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An induction hob can draw more power than all other appliances in an apartment combined. In large panel blocks and tenements, this is the most common reason for an electrician's visit after an 'unsuccessful' purchase.
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After flooding a basement, garage, or apartment, the biggest mistake is to turn on the power 'to test'. We explain the correct sequence: from disconnection, through drying and measurements, to deciding the scope of repair.
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Building law requires periodic inspection of electrical and lightning protection systems at least once every 5 years. We explain who this applies to, what exactly the inspection covers, and how to carry it out efficiently in a building full of tenants.
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'By eye' is the most expensive diagnostic method in electrical work. We explain in plain language what an electrician measures with a meter, what the results mean, and how to read the report you receive after the inspection.
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Aluminium, no earthing, fuse box with 'fuses' – sound familiar? Replacing an installation doesn't have to mean moving out and a dug-up apartment. We explain how to divide it into stages and where to start.
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"That'll be about 200 zł... but it turned out to be 900" – the most common story we hear from clients after market experiences. We explain what the price of an electrical service really consists of and how upfront pricing works.
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A heat pump is one of the largest electricity consumers in a home. An installation audit before purchase costs a fraction of the investment – and protects against a scenario where the cost estimate grows after the contract is signed.
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The photovoltaic boom left thousands of hastily installed systems. Surge protection, earthing, and connector condition are elements not visible from the ground – yet they determine safety and yields.
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In a detached house, a wallbox is a matter of one good technical decision. In a block of flats – procedures, expert opinions, and discussions with the community. We explain both paths without marketing fog.
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Induction, heat pump, car charger – today's home can need twice as much power as a decade ago. We explain the difference between connection capacity and contracted capacity, and what the entire procedure with the operator looks like.
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You can replace the installation in each apartment separately and still have a problem: the bottleneck of an old building is the common power supply. We explain what a main supply line (WLZ) is, how to tell if it's insufficient, and what modernisation looks like without relocating tenants.
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Moisture doesn't cut off power overnight — it works slowly: corroding contacts, lowering insulation resistance, and causing intermittent faults. How to recognise them and what to do.
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Replacing a 'smokestack' with electric heating is often the simplest path to warmth without coal — provided your electrical installation is ready for it. We calculate power requirements and show what to consider before buying heaters.
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During handover, everyone looks at walls and windows, while the electrical installation is 'invisible'. However, a fault noted in the handover protocol means a free repair — the same fault discovered a year later is your problem. Checklist below.
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Execution of a measurement campaign for a housing cooperative. Offline-first PWA, cloud synchronisation, PN-EN protocols in digital format.
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We have obtained the NCAGE code, which opens doors to contracts in the defence sector. Learn what the NATO CAGE system is and what it means for institutional clients.
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Smart lighting, roller blind control, motion sensors — a Smart Home guide without complicated terminology. Practical tips to get started.
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How we modernised the complete electrical installation in a tenement house from 1920, preserving the building's character. 48 premises, 3 months, zero complaints.
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We are proud to announce our partnership with Leroy Merlin Polska. What does this mean for our clients? Higher standards, better access to materials, and new opportunities.
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An energy performance certificate has been mandatory for sales and rentals since 2023 — and in 2026, the regulations went further: a new template with energy classes A+–G, class in advertisements, and the end of exemptions for historic buildings.
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