On-grid vs hybrid solar — which is right for your Bali villa?
Choosing a solar system for your Bali villa is one of the most impactful decisions you'll make as a property owner. The good news: you don't need to be an engineer to make the right call. In this guide, we break down the two most popular options — on-grid and hybrid — so you can understand the trade-offs before booking your free survey.
What is an on-grid solar system?
An on-grid (or "grid-tied") system connects your solar panels directly to the PLN grid via an inverter. During the day, your panels generate electricity that powers your home first. Any surplus is exported to PLN, earning you a credit on your bill under Indonesia's net-metering (ekspor-impor) policy.
How it works:
- Panels generate DC electricity during daylight hours
- Inverter converts DC to AC and powers your loads
- Surplus power flows to the PLN grid — you earn a credit
- At night or on cloudy days, you draw from PLN as normal
Pros
- Lowest upfront cost — no battery bank required
- Proven technology — simple, reliable, easy to maintain
- Net-metering benefit — your exported units offset your bill
- Ideal for properties with reliable PLN — most of Seminyak, Canggu, Ubud, Sanur
Cons
- No backup during blackouts — when PLN goes down, your system shuts off (for safety reasons)
- Limited self-consumption at night — you still pay for nighttime power
- Exposed to PLN tariff increases — if rates rise, your savings proportionally shrink
What is a hybrid solar system?
A hybrid system does everything an on-grid system does, but adds a battery bank. Excess solar power charges your battery first; once full, it exports to PLN. During a blackout, your inverter automatically switches to battery mode — often in under 20 milliseconds.
Pros
- Backup power during PLN outages — critical for villas hosting guests
- Higher self-consumption — store daytime solar for evening use
- EV-ready — charge your car from the sun, not the grid
- Future-proof — add capacity as battery prices keep falling
Cons
- Higher upfront cost — typically 20–30% more than on-grid
- Battery lifespan — most lithium cells warrant 10 years, then need replacement
- More complexity — more components = slightly more to maintain
The Bali context
Bali averages 4.5 peak sun hours per day — excellent by global standards. However, PLN reliability varies significantly:
| Area | PLN reliability |
|---|---|
| Seminyak / Canggu | Good (rare outages) |
| Kuta / Legian | Good |
| Ubud | Moderate (monthly outages during storms) |
| North Bali | Variable — some areas see weekly outages |
| Remote areas | Poor — off-grid may be better |
For a Canggu villa with reliable power, an on-grid system is often the smart financial choice. For an Ubud villa that hosts guests 365 days a year, a hybrid system earns its premium in guest satisfaction alone.
Cost comparison (10 kWp example)
| On-Grid | Hybrid | |
|---|---|---|
| Estimated system cost | Rp 130 million | Rp 160 million |
| Monthly savings (70–85%) | Rp 2.9M | Rp 3.5M |
| Payback period | ~3.7 years | ~3.8 years |
| Backup during outage | ✗ | ✓ |
| EV charging from solar | Limited | ✓ |
Based on 600 kWh/month consumption at Rp 1,700/kWh. Use our solar calculator for your property.
Our recommendation
Choose on-grid if:
- Your PLN supply is reliable
- Budget is your primary concern
- You don't have an EV and outages are infrequent
Choose hybrid if:
- You host guests and can't afford outages
- You own or plan to own an EV
- You want maximum energy independence
- You're in an area with frequent PLN interruptions
Get your personalised recommendation
Every villa is different. The best way to know which system suits your property is a free, no-obligation site survey with one of our engineers.