光伏与能源

偏远站点离网光伏

为无电网或电网薄弱的学校、卫生站、农场、工地营地和通信基站提供独立供电。

现场常见问题

Many villages and work sites in the hills still have no power line, or a supply so weak that a fridge will not run. Generator fuel has to be hauled a long way, the sets are noisy and break down. Small do-it-yourself solar kits often work only in the dry season, and the battery dies within a year, because they were sized for sunny days rather than for the wettest month.

Designed for the darkest month

An off-grid system has no grid to fall back on. Every kWh you use must come from the panels and the battery. So we design for the month with the least sun in the rainy season, not the yearly average (about 4.5–5.5 kWh/m²/day), and give the battery days of autonomy for runs of overcast days.

Worked example: a provincial primary school

Equipment	Use	Energy/day
10 LED lights × 10 W	6 hours	0.6 kWh
5 computers/laptops × 60 W	6 hours	1.8 kWh
6 fans × 50 W	6 hours	1.8 kWh
Projector 250 W	3 hours	0.75 kWh
Total		about 5 kWh

If the worst month gives about 3.5 peak sun hours and system losses are about 25%, the array needed is 5 ÷ (3.5 × 0.75) ≈ 1.9 kWp. We would fit about 2.4 kWp (four 600 W panels). Battery for two days of autonomy: 5 × 2 ÷ 0.9 ≈ 11 kWh of LiFePO4. This shows the method; every site needs its real load measured.

Cut the load before adding panels

Off-grid, every watt counts. Switching to LED lighting, inverter air conditioners or efficient fridges, and keeping electric cookers and kettles off the system, makes it much smaller. We will tell you plainly which appliances do not belong on it.

Built to survive a remote site

An inverter-charger with a generator input for weeks when the rain does not stop
Lightning protection and good earthing, since remote sites are often high and exposed
Weatherproof, rodent- and insect-proof enclosures, and anti-theft bolts on the panels
Remote monitoring over 4G where there is signal, so we see the battery before it runs flat
Training for a local caretaker to clean panels and read the basic status lights

Tell us which province the site is in, how you get there and what will run on it. We will size the system and plan the transport.

功能

Sized for the rainy season

Uses the sun of the weakest month, with days of autonomy in the battery.

Off-grid inverter-charger

Clean sine-wave output, built-in MPPT and a generator input.

LiFePO4 storage

Many times the cycle life of lead-acid, and no topping up with distilled water.

Lightning and earthing

SPDs on every port and a measured earth, critical on hilltop sites.

Remote monitoring

Battery state and alarms over 4G where coverage allows.

Local caretaker training

An illustrated Lao-language guide: cleaning, reading status lights, what not to plug in.

设计与实施

1
List appliances and hours of use, then turn them into kWh per day.
2
Remove unnecessary loads and replace power-hungry appliances.
3
Size the array for the worst month, the battery for autonomy, and the inverter for peak load including motor start-up surges.
4
Pre-assemble and bench-test before shipping, and plan transport around the rainy season.
5
Install mounting, panels, equipment enclosure, earthing and lightning protection, then test every string.
6
Train the caretaker and switch on remote monitoring.

适用场景

Primary and secondary schools in remote districts: lights, fans and a computer room.
Health posts: delivery-room lighting, vaccine fridges and phone charging.
Mining and construction camps cutting generator run-hours.
Farms and plantations far from the line: lighting, CCTV and electric fencing.
Telecom repeaters and village Wi-Fi points.

常见系统规模

Small Site

适用于: About 1–5 kWh/day: health posts, telecom points, remote homes

48 V inverter-charger with LiFePO4 battery
Weatherproof, rodent-proof enclosure
Lao-language caretaker guide

获取报价

School & Farm

适用于: About 5–20 kWh/day: schools, farms, lodges

Inverter sized for peak load, with generator input
Two days of battery autonomy
Remote monitoring where there is signal

获取报价

Camp & Microgrid

适用于: Over 20 kWh/day, or several buildings sharing a generator

Paralleled three-phase inverters
Automatic generator start based on battery state
O&M plan with on-site spares

获取报价

我们供货并安装的品牌

Growatt

Huawei

所有品牌名称和商标归其各自所有者所有。除非另有明确说明，提及某品牌并不代表与其存在合作关系。产品均通过正规分销渠道采购。

常见问题

Can an off-grid system run air conditioning?

Yes, but the system gets much bigger. A 12,000 BTU inverter air conditioner draws about 0.8–1.2 kW; eight hours is roughly 6–9 kWh a day, more than the whole school in our example. We usually advise running it only in the middle of sunny days.

Do we still need a generator?

For critical sites such as health posts and work camps, we recommend one. Designing to get through every rainy week with no generator means far more panels and battery than is sensible. A small generator that runs a few times a year is the more reasonable answer.

Who fixes it if it breaks somewhere remote?

Remote monitoring lets us see the problem and guide the caretaker over WhatsApp first; many issues are settings or dirty panels. If a visit is needed, we schedule it and bring the parts the diagnosis points to.