AbsoEnergy
Technologies
Twelve technologies with photos, pros and cons, sizes, starting prices and an honest verdict: what makes sense in Russia and Vietnam, and what does not yet.
Solar panels
Modules on a roof, a façade or the ground turn light into electricity. The cheapest new electricity in the world — but only by day and with big seasonal swings.
Price from: Russia: 48,000 ₽ per kW · Vietnam: 6.5 m ₫ per kW
Inverters
The heart of the system: turns the direct current of panels and batteries into alternating current, decides where to take energy from and isolates the house from the grid during an outage.
Price from: Russia: 48,880 ₽
Battery storage
LFP batteries store the daytime sun for the evening and keep the house running during outages. Packs have fallen to $70 per kWh, but a turnkey system is still expensive.
Price from: Russia: 16,400 ₽ per kWh · Vietnam: 2.6 m ₫ per kWh
Heat pumps
A heat pump moves heat from the air or the ground into the house: 3–4 kWh of heat per 1 kWh of electricity over a season. It pays off where homes are heated with electricity, LPG or diesel.
Price from: Russia: 37,190 ₽ · Vietnam: 47.9 m ₫
Solar water heaters
Evacuated tubes or a flat collector heat water directly with the sun. Simple technology: a square metre of roof gives 2–3 times more heat than a square metre of panels gives electricity.
Price from: Vietnam: 6.85 m ₫
EV charging
A 7–22 kW wallbox charges the car at home overnight, and with solar and smart control — on the daytime surplus.
Price from: Russia: 50,900 ₽ · Vietnam: 3,858 ₫ per kWh
Smart energy management
Software decides when to charge the battery and the car, heat water and run the heat pump, so that more of your own sun stays at home.
Generators and backup
A generator keeps a house running for as long as there is fuel. Best of all paired with a battery: the generator runs less often and under load.
Price from: Russia: 22,690 ₽
Small wind
A home turbine works at night and in winter, but on a roof or in a village it gives almost nothing. It makes sense in an open spot with an average wind of 4.5–5 m/s or more.
Price from: World: 5,120 $ per kW
Small hydro
A stream with a drop in height gives energy around the clock. Pico and micro hydro go up to 100 kW; head and flow decide everything.
Price from: World: 1,300 $ per kW
Hydrogen for the home
Fuel cells and electrolysers for the home exist, but in 2026 they are an expensive niche: of 100 kWh of sun, 26–36 come back.
Audit and energy saving
The cheapest kilowatt-hour is the one you don’t need. A thermal camera, circuit-level metering and simply replacing appliances often give more than the first panel.
The “relevant / case by case / rarely” rating is ours: based on climate, tariffs, rules and prices as of 02.11.2026. The details are on each technology’s page.
Request for supply and installation
Tell us about the property and what you need — we’ll calculate it and propose the kit, the price and the timing.