DIY Home Energy · Bavaria, Germany

Build it. Measure it.
Prove it.

I am an engineer converting an oil-heated German house to solar, battery storage and a heat pump. Doing the work myself, and showing every number. No sponsored hype, no brochure figures. Real measurements from real hardware.

No brochure numbersEvery assumption shownFailures included

Watch on YouTube Get the build log

What gets built here

Everything is a real installation on a real house, measured with real instruments.

DIY Solar

Roof layout, module packing, Dachhaken and rails, string design. Planned to the tile, not to the brochure.Photovoltaik in Eigenleistung

Balkonkraftwerk

Twelve months of measured yield from a real balcony system, and what the marketing gets wrong.Balkonkraftwerk, echt gemessen

Battery Storage

Sizing, hybrid inverters, MPPT strings, and the honest answer on whether a battery pays back.Speicher und Wirtschaftlichkeit

Heat Pumps

JAZ, flow temperature and the hydraulics nobody explains. Why a 2.500 EUR fix beats 8 kWp more PV.Wärmepumpe, JAZ, Vorlauftemperatur

Grid Connection

Zählerschrank, Ferraris meters, Notstrom versus Ersatzstrom, and the hidden costs in every DIY build.Netzanschluss und Anmeldung

The Maths

Payback in euros with the assumptions on screen, plus the counterfactual you were not shown.Amortisation, nachvollziehbar

The build log

One house, one oil boiler being retired, documented end to end.

Roof surveyed to the individual tile, 41 x 20 courses per plane at 25 degrees
Every window, chimney and snow guard measured before a single module was bought
Module choice ranked by how many actually fit, not by watt-peak on the box
Inverter and string design published, including what I got wrong first time
Full bill of materials with shop names and dated prices
Post-install measured yield against the prediction, monthly

Why bother doing it yourself

Roughly 950 EUR per kWp self-built, against 1.500 to 1.900 EUR per kWp turnkey. On a mid-size domestic array that gap is the difference between a payback you can defend and one you cannot. The channel shows exactly where the money goes.

Real quotes, real invoices, real dates
Nothing recommended that I have not installed
If a product misses its datasheet, I say so on camera

Get the build log

New video every week. Occasional email when a real measurement lands or a parts list goes up. No spam, unsubscribe any time.

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Build it. Measure it.Prove it.