Solar PV: Design, Installation and Repair
On-grid, hybrid and off-grid solar in Laos, from homes to factory roofs, by specialists from Thailand. We also repair inverters and existing systems.
5+ MW
of solar PV installed by our team in Thailand
Tier 1
panels from makers on the industry's Tier 1 bankability lists
3 types
on-grid, hybrid with battery, and off-grid
kW → MW
every scale, from homes and shops to factory roofs and ground mounts
Inverter
diagnosis, board-level repair where feasible and warranty claims, whoever installed the system
The VGroup IT Solutions solar team are specialists from Thailand. Our team has installed more than 5 MW of solar PV in Thailand, from homes and shops to schools, government offices, companies and factory roofs. We bring the same design and testing practice to work in Laos.
We build all three system types: on-grid for buildings that use most of their power during the day, hybrid with LiFePO4 batteries where outages and brownouts are frequent, and off-grid for schools, health posts, farms and camps with no power line. In Laos we do not open with the electricity bill. We start by asking when you need power, and what must stay on when the grid goes down.
All equipment comes through Thailand. Every quote names the brand and model of panels, inverters and batteries, gives a realistic lead time and explains what each maker's warranty covers. After installation we stay on to maintain the system, and we also repair systems installed by other companies.
我们设计安装的系统
屋顶并网光伏适用于住宅、商铺、办公室和学校的屋顶光伏，按白天用电负荷设计，可选防逆流（零上网）。
工商业光伏为厂房屋顶、光伏车棚和地面电站提供工程化光伏系统，规模从几百 kWp 到兆瓦级。
光储混合系统混合逆变器加 LiFePO4 电池，停电和傍晚电压不稳时保持供电，并把白天的光伏电量留到晚上用。
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。
光伏水泵用太阳能从水井、溪流或池塘抽水，供果园、稻田、农场和村庄用水，无需燃油或电线。
光伏运维与监控清洗、巡检、红外热成像、组串测试和发电性能跟踪，我们安装的或他人安装的系统都可以。
光伏逆变器与系统维修故障代码诊断，可行时做板级维修，协助向厂家办理保修，或更换设备。无论谁安装的系统都可以。服务对象
Schools and colleges
On-grid for town schools that use power during class hours; off-grid for provincial schools with no power line.
Government offices and health posts
Daytime power for office work, and backup for vaccine fridges, lighting and communications.
Companies and offices
Office rooftops with zero-export, and battery backup to keep servers, CCTV and Wi-Fi running.
Factories and warehouses
Hundreds of kWp up to MW on roofs, carports or ground mounts, sized to daytime load.
Homes and shops
Small systems built properly, with the same earthing, SPDs and monitoring as large ones.
Farms and remote sites
Solar water pumping, off-grid power for camps, and systems that cut generator hours.
项目实施流程
- 1
1. Send us the basics on WhatsApp
Roof photos, electricity bills, location and what must keep running in an outage.
- 2
2. Site survey
Orientation and shading, roof structure and waterproofing, switchboards, earthing and cable routes.
- 3
3. Load analysis
Twelve months of bills and measured load where needed, to find the daytime and essential loads.
- 4
4. Design
String sizing, a single-line diagram and a yield estimate that allows for heat, dust and the rainy season.
- 5
5. Proposal with a bill of materials
Brand and model for every item, datasheets, maker warranty terms and the lead time from Thailand.
- 6
6. Installation
Under a safety plan: fall protection, every roof penetration sealed, DC cable in UV-resistant conduit or tray.
- 7
7. Commissioning and handover
Voc and Isc on every string, insulation resistance, polarity, earth continuity, inverter settings and a thermal scan, then the handover file.
- 8
8. Monitoring and after-sales
Monitoring in your own name, issues reported on WhatsApp, cleaning and an annual inspection.
设备与安全
Tier 1 panels
Panels from makers on the Tier 1 bankability lists, with the difference between the product warranty and the linear performance warranty explained.
Inverters chosen for the job
String, hybrid or off-grid to suit the site, from brands with service and spare parts available through Thailand.
Mounting and roof
Roof load checked, aluminium or galvanised steel rails, and every penetration sealed.
DC safety
DC isolators, solar-rated DC cable, MC4 connectors of one make on both halves, and module-level devices where the roof calls for them.
Earthing and surge protection
Frames and panels bonded and the earth measured, SPDs on both DC and AC sides for rainy-season lightning.
Monitoring and test records
Every system has monitoring and per-string test results to compare against in the years ahead.
Repair and care for systems from any installer
We repair and maintain solar systems, including inverter repair, whether we installed the system or another company did.
Inverters
- Diagnosis from fault codes, alarm logs and on-site measurement: isolation faults, residual current, grid voltage, DC over-voltage, overheating and fans, relays, internal power supplies, meter and BMS communication
- Board-level repair where parts are available and the design allows it
- Warranty claims with the maker for units still under warranty, without opening them
- Replacement matched to the existing strings when repair is not possible
Panels, cabling and batteries
We trace dead strings and leakage points with insulation tests, replace burned MC4 connectors, find hot spots and failed diodes with a thermal camera, fix earthing and SPDs, and check LiFePO4 batteries and BMS on hybrid and off-grid systems.
Routine care
Cleaning, annual inspections, remote production monitoring and reports with photos. Systems whose original installer no longer answers start with a full health check. More on inverter repair and O&M and monitoring.
交付时您将获得
- As-built single-line diagram
- Panel layout and string map showing which panel is on which string
- Commissioning test sheet: Voc, Isc, insulation resistance, polarity and earth continuity for every string
- Thermal images from commissioning
- Datasheets and maker warranty documents with serial numbers
- Inverter settings record: grid parameters, zero-export and battery
- Monitoring account registered in your own name
- Emergency shutdown procedure and labelled isolators on site
- Photos of hidden work: cable routes, roof penetrations and earthing
- Cleaning and basic care guide
我们供应安装的品牌
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。
太阳能相关指南
如何选择光伏安装商：买家检查清单
一份好的光伏报价和安装应包含：现场勘察、明确品牌型号、组串设计、调试测试、质保条款，以及危险信号。
光伏用 LiFePO4 电池：DoD、循环次数、BMS、高温与容量选型
LiFePO4 为何已取代大部分铅酸电池，如何解读 DoD、循环寿命和质保，BMS 的作用，老挝高温为何重要，以及按备电时长确定电池容量。
学校与公共建筑光伏：设计、安全与维护
学校和办公楼白天用电，正是光伏发电的时候。如何按负荷选型，选择防逆流并网、混合或偏远学校离网，保障学生安全，便于员工维护，并编写可公平比较报价的技术规格。
光伏逆变器故障代码：业主可自查什么，什么需要技术员
各品牌逆变器共有的故障类别：绝缘阻抗低、接地故障、电网电压/频率越限、过温、极性反接、电弧、通讯中断和电池 BMS 故障。业主可安全检查的项目，以及何时属于保修范围。
光伏逆变器类型：组串式、混合、微型、工商业与离网对比
各类逆变器的工作原理与适用场景，如何设定直流/交流容配比并匹配组串，以及在监控 App 中关注哪些数据以便及早发现问题。
光伏运维与清洗清单：旱季粉尘、安全清洗与关键指标
按老挝季节（含烧荒季）制定的清洗计划，如何清洗而不损伤组件和人员，月度/季度/年度检查清单，等效发电小时、系统效率 (PR) 以及热斑红外检测。
并网、混合还是离网光伏：哪种适合您的站点？
三种光伏系统在电网停电时的表现、各自的现场条件要求，以及老挝的办公室、工厂、学校或偏远营地如何选择。
光伏安装前的屋顶评估：结构、防水、抗风、遮挡与朝向
我们在现场评估彩钢瓦、瓦片和混凝土屋顶的清单：檩条与荷载、防水、夹具与导轨、风荷载、遮挡、适合老挝纬度的倾角、走线路径和清洗通道。
光伏系统选型：从电费单 kWh 到 kWp、电池和逆变器
如何根据月度电费和白天负荷确定组件、电池和逆变器容量，附三个示例：并网办公室、混合住宅和离网卫生站。
Tier 1 光伏组件详解及组件规格书解读
Tier 1 能说明什么、不能说明什么，如何解读功率公差、温度系数、衰减和两类质保，以及 TOPCon、BC、HJT、双面和双玻组件的区别。
备用电源选发电机、电池还是光储混合？
发电机、电池还是光储混合？对比切换方式、成本因素以及停电备电的电池容量选型。
常见问题
Was the 5+ MW installed in Laos or in Thailand?
In Thailand, by our team. We are specialists from Thailand, and we apply the same design, installation and testing practice to work in Laos.
Should I choose on-grid, hybrid or off-grid?
Stable grid and heavy daytime use: on-grid. Frequent outages or brownouts and equipment that must stay on: hybrid with battery. No power line at all, or a very weak one: off-grid.
Will solar keep my power on during an outage?
Only hybrid and off-grid systems with a battery. A standard on-grid system must stop when the grid fails, to protect crews working on the lines.
Which panel and inverter brands do you use?
Tier 1 panels, and inverters and batteries from brands with service channels through Thailand. Brand and model are named on every quote, so you can check the datasheets and warranty terms yourself.
What warranties come with the system?
Each component carries its maker's warranty: panels have a product warranty and a longer linear performance warranty, inverters a standard warranty that some brands let you extend, batteries a limit in years plus cycles or MWh. We explain the terms for the models we propose, in writing.
Do you repair systems installed by other companies?
Yes. We diagnose inverters of any brand, repair at board level where feasible, help with maker warranty claims and fix DC- and AC-side faults. Send a photo of the fault code and the inverter label on WhatsApp to start.
How long from first contact to switch-on?
The longest part is usually getting equipment from Thailand, not the installation itself. Most home and shop systems take a few days on site; factory systems take longer. We give a realistic timeline on the quote.
发给我们建筑平面图或几张现场照片
我们会先询问一些细节，再给出初步设计方案。首次咨询免费，可用老挝语、泰语或英语，通过 WhatsApp 或 Facebook 主页联系。