If you own a 3BR family villa in Bali and your PLN bill is consistently above Rp 2.5 million per month, solar probably makes sense for you. The math is unusually clean at this villa size: the load is predictable, the roof is usually manageable, and the payback lands in a range that doesn't require a leap of faith.
This article walks through the realistic load profile, the right system size, a real install example with actual numbers, and the cases where we'd honestly tell you to hold off. No vendor-inflated savings projections. Just the sizing template we use.
TL;DR
- A 3BR Bali family villa typically pulls 25 to 40 kWh per day, putting you in the 5 to 8 kWp hybrid range. All-in cost: Rp 130 to 200 million before VAT.
- Hybrid is the right architecture for most south and central Bali 3BR family villas. PLN stays as a quiet backup, and you stop paying for most of it.
- Family AC timing runs mostly evening and early morning, both outside peak solar hours. A 10 to 15 kWh LiFePO4 battery fills that gap.
- Real Canggu example: Rp 165 million install, Rp 4M/month bill drops to Rp 1.2M, payback 4.9 years, Rp 700 million+ cumulative savings over 25 years.
- If your bill is below Rp 2 million per month, payback stretches to 7 to 10 years. At that range we'd tell you to hold off or go smaller.
- We coordinate the project end to end. You don't manage multiple vendors.
Your 3BR villa's actual load
Most solar articles size systems from a generic national average. That average is useless in Bali. Here's what a real 3BR family villa actually uses.
AC load. You've got a master bedroom AC and two more for the kids' or guest rooms. Assume 1.5 PK inverter-type units at roughly 1.1 kW each when running. The master runs 9 hours a night (9 PM to 6 AM). The secondary rooms run eight hours. The living area AC covers maybe four to six hours in the late afternoon and evening. Total AC energy: roughly 22 to 30 kWh per day. The timing matters more than the total: only about 30% of AC load falls during peak solar hours (9 AM to 3 PM). The other 70% hits after sunset.
Base load. A refrigerator plus freezer combo runs 24/7 at about 0.8 to 1.2 kWh per day. The water pump cycles add another 0.5 to 1.5 kWh. A pool circulation pump at variable speed (most 3BR Bali villas have a pool) adds three to six kWh per day depending on run time. Washing machine, router, lighting, TV, and device charging together add roughly three to five kWh.
Put it together: most 3BR Bali family villas with a pool land at 25 to 40 kWh per day. Energy-efficient family with inverter ACs and a variable-speed pool pump: lower end. Older non-inverter ACs or a larger pool: upper end.
One thing that catches families off guard: extended-family visits. When the in-laws or cousins come to stay, load can spike 1.5 to 2x for a week or two. Size for your normal usage, not your peak, but confirm the inverter has enough surge capacity to handle a brief load spike when multiple ACs and the pool pump kick on at once.
Practical first step before getting quotes: pull your last six PLN bills. Add up the kWh totals and divide by 180 (six months of days). That's your real daily average. Don't size from a vendor's estimate. Size from your own meter data.
Picking the right components
With a daily load of 25 to 40 kWh and Bali's average 4.7 peak sun hours, panel sizing follows a simple formula:
kWp needed = daily kWh / PSH
For a 32 kWh/day villa: 32 / 4.7 = 6.8 kWp. Round up to the next module size (580 Wp panels, so 12 modules = 6.96 kWp). Add one more panel as a wet-season buffer and you're at 13 modules (7.54 kWp). We size for the cloudy month, not the sunny one.
Panels. 11 to 14 modules of 580 Wp, Tier-1 brand (Jinko Tiger Neo, Trina Vertex N-type, LONGi Hi-MO X6). Expect to pay Rp 2,000 to 2,400 per Wp for panels landed in Bali, including freight from Java.
Inverter. A 5 kW hybrid inverter handles a 3BR villa comfortably when your PLN connection is single-phase (common at 5,500 VA). If you have a 7,700 VA or higher 3-phase connection, a 5 to 8 kW 3-phase hybrid is cleaner and distributes load better across phases. Our default picks at this size: Luxpower SNA 5K for single-phase builds (solid value, well-supported in Indonesia, good off-grid mode), Deye SUN-5K if you want more refined off-grid firmware and easier parallel expansion later. Both are parallel-capable if you ever need to add a second unit.
Battery. This is where family villas need more thought than most articles acknowledge. Your AC runs from 9 PM to 6 AM, nine hours of the heaviest load, all outside solar hours. A 10 kWh battery (two Pylontech US3000C modules at 5.12 kWh each, totaling about 8 kWh usable at 80% DoD) covers roughly two-thirds of a single bedroom's overnight AC. For a family running AC in two or three rooms simultaneously, 15 kWh is more realistic.
The battery doesn't need to cover 100% of overnight load. PLN tops up the rest. That's the point of a hybrid system: solar handles most of your load, PLN handles the shortfall, and you stop paying for nearly all of it.
Here's a rough equipment-only cost breakdown for a typical 3BR system:
| Component | Spec | Equipment cost |
|---|---|---|
| Panels | 12 to 14 x 580 Wp (Jinko or Trina) | Rp 27 to 36 million |
| Inverter | Luxpower SNA 5K or Deye SUN-5K | Rp 18 to 26 million |
| Battery | 15 kWh Pylontech (3 modules) | Rp 50 to 60 million |
| Balance of system | Mounting, cabling, breakers, surge protection | Rp 10 to 18 million |
| Labor and Bali shipping | Install, commissioning | Rp 25 to 40 million |
| Total | Rp 130 to 180 million |
Add 11% VAT to reach your cash-out number. Some installers include VAT in the quote; confirm before comparing.
A real example: Canggu 3BR family
Here's a live scenario from a project we coordinated this year. We're not naming the villa, but the numbers are real.
Villa profile: 3 bedrooms, single-phase 5,500 VA PLN, infinity edge pool with a 1.5 kW variable-speed pump, three inverter-type ACs, solar-thermal hot water (no electric hot water load). Average monthly PLN bill: Rp 4.0 million.
Measured daily load: 32 kWh, with about 65% falling outside peak solar hours.
System sized: 6 kWp panels (11 x 560 Wp LONGi), Luxpower SNA 5K hybrid inverter, 12.5 kWh usable Pylontech battery (two US3000C + one US2000 module).
All-in install cost: Rp 165 million before VAT, including equipment, Bali shipping, balance of system, labor, and commissioning.
Post-install bill: First full month came in at Rp 1.2 million. The battery covers the 9 PM to roughly 1 AM window; PLN handles the residual early-morning draw from 1 to 6 AM.
Monthly savings: Rp 2.8 million, or Rp 33.6 million per year.
Payback: Rp 165 million / Rp 33.6 million per year = 4.9 years.
25-year projection at flat PLN rates: net savings of about Rp 840 million minus the Rp 165 million install = Rp 675 million cumulative. If PLN tariffs rise 5% per year (which they've been doing), that number moves past Rp 900 million.
The family plans to stay long-term. Even with conservative assumptions, the numbers are compelling.
When this doesn't fit your home
We'd rather tell you up front than put you in a system that disappoints.
Bill under Rp 2 million per month. At this level, payback stretches to 7 to 10 years. For families on shorter leases or uncertain tenure plans, that doesn't pencil well. A smaller grid-tied system (no battery, Rp 50 to 80 million range) cuts bills without the battery premium, but you lose blackout protection.
Heavy shading from trees or neighboring buildings. If your roof is shaded for more than three to four hours per day on average, production drops sharply. We'll identify this at the survey. Some Ubud villas with mature frangipani or banyan trees nearby land in "shade too severe" territory, and we'll tell you honestly.
Selling within three years. Solar adds resale value but rarely recovers a full install cost on a two to three year horizon. Wait until you're committed to the property.
Roof needs replacement first. Old terracotta tile due for replacement in five years shouldn't have 200 kg of panels added on top. Fix the roof first.
Ready to size your villa?
The fastest path to real numbers is a short WhatsApp conversation. Tell us your villa location, your average monthly PLN bill, how many ACs you run and for how long, and whether you have a pool. We'll come back with a sizing estimate and honest cost range within a day. Free, no commitment, no follow-up pressure.
Or size it yourself first, then chat us about the specifics.
Frequently asked questions
Most 3BR villas with three AC units, a pool pump, and standard base load pull 25 to 40 kWh per day. That puts you in the 5 to 8 kWp range for a hybrid system. Rough formula: divide your daily kWh by 4.7 (Bali peak sun hours) and round up to the next module size.
