Hybrid Inverter for Home — How to Choose Power, Brand, and Configuration
A hybrid inverter is a device that combines grid-tied and off-grid inverter functions in a single unit. It simultaneously works with solar panels, battery storage, and the utility grid, automatically switching between power sources. For a Ukrainian homeowner, this means uninterrupted power during blackouts, reduced electricity bills, and the ability to gradually expand a solar power system. But how do you choose the right model from dozens of options ranging from 3 to 50 kW? Let us walk through it step by step.
What Is a Hybrid Inverter and How Does It Differ from a Standard One
A standard grid-tied (on-grid) inverter converts DC power from solar panels into 220/380V AC and feeds it into the grid. When the grid goes down, it shuts off — leaving the house without power even in bright sunshine. An off-grid inverter works only from batteries and panels but cannot synchronize with the grid.
A hybrid inverter combines both modes. Its key advantages:
- Automatic switchover to battery when the grid fails in 10–20 ms (appliances won't even notice)
- Battery charging from grid or solar panels — whichever is more cost-effective
- Selling excess power back to the grid (with a feed-in tariff)
- Built-in MPPT controller for optimal performance with solar panels
- Wi-Fi/Ethernet monitoring — see generation and consumption in real time
How to Calculate the Right Inverter Power Rating
This is the most critical question. An underpowered inverter won't handle the load; an oversized one wastes money. Here's a simple method:
Step 1: Calculate Peak Load
Add up the wattage of appliances that will run simultaneously. A typical example for a 100–150 m² home:
- Refrigerator — 150 W (startup 450 W)
- Heating circulation pump — 100 W
- LED lighting — 200 W
- Router + laptop — 100 W
- Washing machine (heating) — 2,000 W
- Electric kettle — 2,000 W
Peak load: ~4,500 W. But the kettle and washing machine rarely run simultaneously, so a realistic peak is 3,000–3,500 W.
Step 2: Choose Power with 20–30% Headroom
For a home with a 3,500 W peak load, a 5 kW inverter is needed. For a home with air conditioning, a boiler, or an electric stove — 8 to 10 kW.
Recommendations by House Size
| House Size | Typical Consumption | Recommended Power | Example Model |
|---|---|---|---|
| Apartment 50–80 m² | 8–12 kWh/day | 3 kW | Veichi VHS-3K-30-H |
| House 80–120 m² | 12–20 kWh/day | 5 kW | Deye SUN-5K-SG05LP1 |
| House 120–200 m² | 20–35 kWh/day | 6–8 kW | Deye SUN-8K-SG05LP1 |
| Large house 200+ m² | 35–60 kWh/day | 10–12 kW | Deye SUN-10K-SG04LP3 |
Single-Phase or Three-Phase: Which to Choose
In Ukraine, homes have either single-phase (220V) or three-phase (380V) connections. This determines the inverter type.
Single-phase inverter (220V) — suitable for apartments and smaller homes with a single power feed. Deye SUN-5K/6K/8K-SG05LP1 and Veichi VHS-5K-L01-K models operate on single-phase power. Easier to install, more affordable.
Three-phase inverter (380V) — for homes with three-phase connections and heavy loads: electric stove, 3-phase air conditioning, workshop. The Veichi VHT series from 4 to 50 kW covers even commercial properties. Three-phase models distribute the load evenly across phases.
If you have a three-phase connection but no heavy 3-phase loads, you can install a single-phase inverter on one phase. However, for full home backup, a three-phase model is preferable.
Brand Comparison: Deye vs Veichi
The hybrid inverter catalog features two brands. Both are manufactured in China with CE certification and warranty. But there are differences:
| Parameter | Deye (SUN series) | Veichi (VH/SI series) |
|---|---|---|
| Power Range | 5–50 kW | 3–50 kW |
| Battery Voltage | 48V (low-voltage) | 48V / 450V / 750V (varies by series) |
| Efficiency | 97.0–97.6% | 97.6–98.4% |
| MPPT Range | 150–850V | 60–950V (wider) |
| Communication | RS485/CAN, Wi-Fi (optional) | Built-in monitoring |
| Best Seller | SUN-5K-SG05LP1 (5 kW, 1-ph) | SISV-6.2K-H (6 kW, 1-ph) |
| Highlight | Largest user base in Ukraine | Wider MPPT range, silent L01-K series |
Deye is a proven brand with a large user community and service network. Veichi offers a wider battery voltage selection and slightly higher efficiency in three-phase VHT models (up to 98.4%).
Battery for a Hybrid Inverter: What to Consider
An inverter without a battery is like a car without a fuel tank. During a blackout, the battery provides the power.
Battery Type
For residential systems, LiFePO4 (lithium iron phosphate) is the standard. Advantages over lead-acid:
- 6,000+ cycle lifespan (lead-acid: 500–800)
- 90–95% depth of discharge (lead-acid: 50%)
- 3–4 times lighter
- 10–15 year service life
What Capacity to Choose
Simple formula: daily consumption × desired backup hours ÷ 24. For a home consuming 15 kWh/day wanting 8 hours of backup: 15 × 8 ÷ 24 = 5 kWh. Accounting for 90% depth of discharge, you need a ~5.5 kWh battery. A 5.12 kWh LiFePO4 battery is the most popular choice.
For full overnight autonomy (10–12 hours) or homes with higher consumption, consider 10–15 kWh batteries.
Solar Panels: How Many Do You Need
Solar panel capacity is matched to the inverter and your goals. The basic rule: panel array = 1.2–1.5× inverter power.
For a 5 kW inverter, 6–8 panels at 500 W each (3–4 kW array) is sufficient. For 10 kW — 12–16 panels. It's important that the array voltage falls within the inverter's MPPT range. For example, Deye SUN-5K-SG05LP1 works with MPPT 150–425V, while Veichi VHT-10K-25-H handles 200–950V (allowing longer strings).
Frequently Asked Questions
How much does a hybrid inverter kit for a home cost?
A basic 5 kW kit (inverter + 5 kWh battery + 4 × 500W panels) costs from 80,000 to 130,000 UAH depending on the brand. Without panels and installation — from 55,000 UAH for inverter + battery.
Can I add more batteries later?
Yes. Most hybrid inverters support parallel connection of additional batteries. Deye SUN-5K-SG05LP1 works with 1–8 LiFePO4 modules at 5.12 kWh each. Start with one module and expand as needed.
Does a hybrid inverter work without solar panels?
Yes. The inverter can function as a UPS: charging the battery from the grid and switching to it during an outage. Solar panels are connected separately when you're ready.
What is the warranty on a hybrid inverter?
Standard warranty is 5 years from the manufacturer on the inverter and 10 years on LiFePO4 batteries (or 6,000 cycles). Actual inverter lifespan is 15–20 years with proper installation.
Do I need a permit to install a hybrid inverter?
For private use (without selling electricity to the grid), no special permit is required. For a feed-in tariff connection, you need a contract with your local energy company and a bidirectional meter.
Step-by-Step Selection Plan
- Determine your grid type: single-phase 220V or three-phase 380V
- Calculate peak load — add 20–30% headroom
- Choose inverter power using the table above
- Calculate required battery capacity (daily consumption × backup hours ÷ 24)
- Select the number of solar panels (array = 1.2–1.5× inverter power)
- Verify compatibility: battery voltage and MPPT range
Browse the hybrid inverter catalog — models from 3 to 50 kW for any home or business. Contact our engineers for a customized system design — we'll help calculate the optimal configuration for your property.
