First, a quick picture of how each system works
Before diving into details, here is a simple way to understand the three types:
Grid-tied: Your solar panels connect to an inverter. The inverter connects to your house and the utility grid. No batteries. When the grid goes down, your system also shuts down.
Off-grid: Your solar panels connect to a charge controller or inverter. Everything goes through batteries. Your house runs entirely from batteries. No connection to the utility grid.
Hybrid: Your solar panels, batteries, and the utility grid all work together. The system decides where to get power and where to send power. When the grid goes down, your batteries keep your house running.
Type 1: Grid-Tied Inverter
What it does
A grid-tied inverter takes DC power from your solar panels and converts it to AC power for your house. Any extra power goes to the utility grid. When your solar panels aren't producing enough, you pull power from the grid.
That's it. No batteries. No backup power.
How it works
During the day, your solar panels produce power. Your house uses what it needs. The excess flows back to the grid. Your meter spins backward. At night, you buy power from the grid like normal.
Best for
| Situation | Why it fits |
|---|---|
| You have stable grid power | You don't need backup |
| You want the lowest upfront cost | No batteries, simpler inverter |
| Your utility has net metering | You get credit for excess power |
| You live in a city or suburb | Grid connection is reliable |
Pros
| Pro | Explanation |
|---|---|
| Lowest upfront cost | No batteries, simpler installation |
| Highest efficiency | No battery charging losses (96-98% efficient) |
| Simple installation | Fewer components to wire |
| Net metering benefits | Sell extra power back to the utility |
Cons
| Con | Explanation |
|---|---|
| No power during grid outage | The inverter shuts down for safety |
| No energy storage | Can't use solar power at night |
| No protection from rate hikes | You still pay whatever the utility charges |
Important safety note: Grid-tied inverters are required to shut down during a grid outage. This protects line workers who might be fixing power lines. You cannot use your solar panels when the grid is down. Even in bright sunshine.
Cost range: 0.10−0.10−0.30 per watt (inverter only)
Typical system example:
5kW of solar panels
5kW grid-tied inverter
No batteries
Total equipment cost: roughly 1,000−1,000−2,000 for the inverter
Type 2: Off-Grid Inverter
What it does
An off-grid inverter takes DC power from a battery bank and converts it to AC power for your house. The batteries are charged by solar panels (or a generator). There is no connection to the utility grid.
You are completely independent. But also completely on your own.
How it works
Solar panels charge the batteries through a charge controller. The inverter draws power from the batteries. Your house runs off the inverter. If the batteries run low, you start a generator. There is no grid to fall back on.
Best for
| Situation | Why it fits |
|---|---|
| No grid access (cabins, RVs, remote farms) | No other option |
| You want complete energy independence | You don't trust the grid |
| Grid connection costs are extremely high | Running power lines costs more than a system |
| Mobile applications (boats, RVs, campers) | You move from place to place |
Pros
| Pro | Explanation |
|---|---|
| Complete independence | No utility bills, no grid reliance |
| Works anywhere | No grid connection needed |
| Simple concept | Easy to understand and troubleshoot |
| No utility paperwork | No permits from power company |
Cons
| Con | Explanation |
|---|---|
| Highest upfront cost | Large battery bank required |
| Limited by battery size | Run out of power if batteries drain |
| You manage everything | No grid to fall back on |
| Generator often needed | For cloudy stretches or heavy use |
| Lower efficiency | Battery charging loses 10-15% of power |
Cost range: 0.30−0.30−1.00 per watt for the inverter. Batteries add 200−200−500 per kWh.
Typical system example:
3kW of solar panels
3kW off-grid inverter
10kWh LFP battery (about 2,000−2,000−4,000)
Total equipment cost: roughly 3,500−3,500−6,000
Type 3: Hybrid Inverter
What it does
A hybrid inverter does everything. It connects to solar panels, batteries, and the grid. It decides where to send power based on what makes the most sense.
During the day, it can run your house from solar, charge your batteries, and send extra to the grid. At night, it can run your house from batteries or the grid. When the grid goes down, it switches to battery power automatically. Your lights stay on.
How it works
The hybrid inverter has built-in intelligence. You set your priorities. Common setups:
Self-consumption mode: Use solar first. Then batteries. Then grid last.
Time-of-use mode: Charge batteries when grid electricity is cheap. Use batteries when electricity is expensive.
Backup mode: Keep batteries full for outages. Only use grid power.
Best for
| Situation | Why it fits |
|---|---|
| You have grid power but want backup | Keeps you running during outages |
| Your utility has time-of-use rates | Shift usage to cheaper hours |
| You plan to add batteries later | Start grid-tied, add batteries anytime |
| You want the most flexible system | Does everything |
Pros
| Pro | Explanation |
|---|---|
| Backup power during grid outages | Your lights stay on |
| Maximizes solar usage | Store extra power for night time |
| Can start with or without batteries | Add batteries whenever you want |
| Time-of-use savings | Charge batteries when power is cheap |
| One device does everything | Simpler than separate components |
Cons
| Con | Explanation |
|---|---|
| Higher upfront cost than grid-tied | More features, higher price |
| More complex to configure | Settings need to be correct |
| Slightly lower efficiency than grid-tied | Battery charging adds small losses |
| Batteries still cost money | The inverter is only part of the system |
Cost range: 0.30−0.30−0.80 per watt for the inverter. Batteries optional at the start.
Typical system example (with batteries):
5kW of solar panels
5kW hybrid inverter
10kWh LFP battery
Total equipment cost: roughly 3,000−3,000−5,000 for inverter + battery
Typical system example (starting without batteries):
5kW of solar panels
5kW hybrid inverter
No batteries yet
Total equipment cost: roughly 1,500−1,500−2,500 for the inverter
Side-by-Side Comparison
Here is everything in one table:
| Feature | Grid-Tied | Off-Grid | Hybrid |
|---|---|---|---|
| Works during grid outage | ❌ No | ✅ Yes | ✅ Yes |
| Requires batteries | ❌ No | ✅ Yes | Optional |
| Can sell power to grid | ✅ Yes | ❌ No | ✅ Yes |
| Works without grid connection | ❌ No | ✅ Yes | ❌ No (needs grid or batteries) |
| Upfront cost | Lowest | Highest | Medium |
| Efficiency | Highest (96-98%) | Lower (85-90%) | Medium (90-95%) |
| Complexity | Low | Medium | High |
| Best for | City homes with stable grid | Cabins, RVs, remote sites | Homes with unreliable grid or time-of-use rates |
Which One Should You Choose?
Answer these three questions:
Question 1: Do you have grid power available?
| If yes | If no |
|---|---|
| You can use grid-tied or hybrid | You must use off-grid |
Question 2: What happens when the grid goes down where you live?
| Goes down rarely (a few hours per year) | Goes down often (several times per month, or for days) |
|---|---|
| Grid-tied or hybrid with small battery | Hybrid with large battery or off-grid |
Question 3: Why are you going solar?
| Goal | Recommended type |
|---|---|
| "Lower my electric bill with lowest upfront cost" | Grid-tied |
| "I want backup power for outages" | Hybrid (with batteries) |
| "I want to cut my bill and have backup" | Hybrid |
| "I have no grid connection at all" | Off-grid |
| "I want to add batteries later, but not now" | Hybrid (start without batteries) |
| "My utility has expensive peak rates" | Hybrid (time-of-use shifting) |
Common Misconceptions
"Grid-tied means I still have power when the grid fails."
No. Grid-tied inverters shut down during outages for safety. You will be in the dark.
"Off-grid is the greenest choice."
Not necessarily. Off-grid systems often rely on generators during cloudy periods. A hybrid system that uses grid power occasionally might have a smaller overall footprint.
"Hybrid inverters do everything off-grid inverters do."
Mostly yes. But some hybrid inverters cannot run without a battery. Check the specs. If you want backup during an outage, you need a battery.
"I can just add a battery to my grid-tied inverter later."
Some grid-tied inverters can be upgraded. Many cannot. If you think you might want batteries in the future, buy a hybrid inverter now. It costs a little more upfront but saves you from replacing the whole inverter later.
What Chuhan Technology Offers
At Chuhan Technology, our ACT series covers all three applications:
| Your need | Our series |
|---|---|
| Off-grid (cabins, RVs, no grid connection) | ACT VP / VM series |
| Grid-tied (sell solar power to utility, lowest cost) | ACT TP series (three-phase) |
| Hybrid (backup during outages, add batteries now or later) | ACT VM I PRO / VM IV / HMT / HES series |
| All-in-one (inverter + battery in one box) | ACT HESS / ACT-M 1P |
Not sure which one fits you? Tell us your situation – we will recommend the right model.
Final Summary
| Your situation | Our recommendation |
|---|---|
| Stable grid power, want lowest cost, okay with no backup | Grid-tied |
| No grid connection at all | Off-grid |
| Grid is there but unreliable (outages happen) | Hybrid with batteries |
| Grid is stable but utility rates are complicated | Hybrid with time-of-use settings |
| You might want batteries someday but not today | Hybrid (buy it now, add batteries later) |
One last piece of advice: If you are unsure, buy a hybrid inverter. It costs more than grid-tied but less than off-grid. It gives you options. You can run it without batteries at first. Add batteries when your budget allows. And when the grid goes down, you will be glad you have it.
