QUANGANHCONS · PV & BESS COST TOOLS

Industrial BESS Sizing and Cost Estimator for Vietnam Factories

Start with discharge power, useful energy and the operating duty. Review the different economics of peak shaving, backup and PV time-shifting before requesting an integrated storage quotation.

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Before you price a project: Use real load and site assumptions. The result is budgetary and does not expose internal procurement discounts or guarantee project performance.

Screen Solar + BESS with the QuangAnhcons tool

Storage is an optional module within Solar Quick, not a standalone BESS offer. Select the battery/storage option in the tool; final PCS/EMS and safety decisions require engineering review.

Power and energy ratings answer different questions

A nominal 200kW/400kWh battery describes a two-hour energy-to-power ratio; 400kW/200kWh describes 0.5 hours, before usable SOC, DoD, efficiency and thermal restrictions. A buyer who only requests a ‘1MWh battery’ has not specified the PCS continuous power.

Peak shaving requires interval-demand history and dispatch strategy. Critical-load backup requires a load list, starting currents, transfer philosophy and reserve energy. PV shifting additionally requires the solar generation curve, inverter/EMS integration and local import/export constraints.

Sizing must account for degradation and operating limits

At the screening stage E_nom ≥ P×t/(η×DoD×SoH) may be used when terms are consistently defined. For an illustrative 200kW load, 2 hours, η=90%, DoD=80%, SoH=90%, nameplate energy should be at least roughly 617kWh before other reserves.

The example is not a quotation or approved battery choice. Confirm rated PCS output, C-rate, temperature, round-trip losses, SOC reserve, cell chemistry, battery warranty and availability of spare equipment.

Commercial BESS scope extends beyond cells

The RFQ should separately identify the battery racks/containers, BMS, PCS, EMS/SCADA, HVAC, fire detection and protection concept, transformers, MV/LV distribution, cables, civil works, lifting, commissioning, site acceptance and operating training.

Ask suppliers to define usable AC energy, cycle and capacity warranty, performance testing, degradation methodology, maintenance, safety documentation and end-of-life responsibilities. Quoted VND/kWh is misleading if delivery and controls scope differ.

Technical & commercial input matrix

Input	Example	Why it matters
Continuous discharge	kW at AC bus	Defines PCS size
Required autonomy	Hours at target load	Defines useful AC energy
Usable SOC/DoD	Battery operating window	Sets nameplate margin
SoH at warranty end	Capacity degradation	Future energy availability
Interconnection	LV/MV SLD and grid limits	PCS transformer and protection
Fire/environment	Site standards and controls	Enclosure and EPC BOQ

All numerical examples are assumptions for screening only. Quote equipment by datasheet and design.

Frequently asked questions

How much is a 1MWh BESS installed in Vietnam?

A credible quote requires PCS power, usable energy, cycle duty, chemistry, warranty, fire strategy and electrical works, not only the advertised kWh.

Will a 1MWh battery supply 1MW for one hour?

Not necessarily. Continuous PCS output, C-rate, SOC limits, usable capacity and conversion losses must support the duty.

Can batteries be installed without solar PV?

Yes. The economic and operating rationale must be assessed independently against actual tariffs and plant load.

Is this a dedicated BESS product pricing tool?

No. This landing page uses the optional storage portion of QuangAnhcons Solar Quick; final BESS design and tender quotation require project-specific engineering.

Relevant engineering resources

Request a site-specific engineering quotation

Send your location, load profile, drawings, SLD, desired commissioning date and procurement scope for a detailed BOQ.

Email technical RFQ ↗

sales@quanganhcgte.com · +84 919 758 191

Updated 21 October 2026. Indicative results do not constitute contractual prices, utility approvals or a safety-certified design.

QUANGANHCONS · SOLAR EPC

Choose Solar & storage for your property

From electricity needs to a preliminary system and budget. No contact details required.

1. What should the system do?

Answer step by step; no kWp knowledge or contact details needed.

Main goal

Building typeExisting system

Province/city and district Preliminary climate region

Sizing method Requested DC capacity (kWp) Equipment package Building type Roof type Site electricity supply

Technical settings & supply scope

Preliminary defaults are selected. Adjust the roof, equipment, connection and cable routes here.

Coverage of remaining roof area Reference PV module Reference inverter Maximum design DC/AC ratio Roof height above ground (m) Average one-way DC route / string (m)Include roof, horizontal and vertical runs to the inverter; do not double for both poles. Declared AC connection capacity (kW; 0 = unknown) Independent control domains Monitoring/control mode Voltage at control metering point (PoC) Electrical architecture Energy use Supply scope Solar engineering documentation Expected cable / tray routes PV mounting system Clearance above roof/ground to lower module edge (m) Existing roof slope (degrees) Independent-rack module tilt (degrees) Entered area measurement basis Existing roof reinforcement New transformer New module cleaning water system

Battery energy storage (optional)

Storage configuration Energy requirement (kWh; 0 = proposed value) Entered energy basis Storage load power (kW; 0 = 50% of PV AC) One-way BESS AC route per branch (m)20 m is an allowance. Enter measured lengths; cable and earthing route prices follow the length. Use / backup duration (hours) Storage purpose Average backup load (kW) Simultaneous backup load (kW) Starting peak (kVA; 0 = unmeasured) Evening energy in addition to outage reserve (kWh) Transfer requirement Proposed changeover

Capacity is rounded to whole modules/cabinets. Backup defaults: SOC 90% to 10%, SOH 90%, discharge efficiency 95%, power derating 10%. Adjust these assumptions through the assistant when data is available. Backup is priced separately; compatibility and transfer time remain unverified.

Scope and budget basis

Preliminary quantities and rates follow the entered configuration and require survey/design confirmation. Basic scope includes standard rails, clamps and module attachments on a suitable existing structure. Select raised frames, foundations, reinforcement, storage or a new transformer to price additions.

Roof height is measured from ground; rack clearance is separate, above the roof/ground surface. Area and row pitch are layout estimates, not approved drawings or wind, structural, waterproofing or fire assessments. VAT follows the quote configuration and requires contract/invoice confirmation.

Automatic pre-survey calculations

Enter your sizing input to see module area, access area, roof requirement, module mass, capacity and electrical configuration.

Developed and operated by QuangAnhcons. Preliminary results require site survey and written confirmation before ordering or construction.

Solar 8.19.0 · QAC-UI-QUOTE 1.1.0

© 2026 QUANG ANH CONSTRUCTION ELECTRICITY COMPANY LIMITED. Quotation prepared by QuangAnhcons. Please retain the issuer name and reference when saving or sharing. Third-party names and materials belong to their respective owners.

QUANGANHCONS

Substation budget estimate

Select the capacity, route lengths and package to view your indicative budget and electrical parameters.

01 Quick estimate

Substation type Capacity (kVA) Quotation packageIndicative pricing for the selected configuration, excluding VAT. Transformer Overhead MV route length (m)Enter only the overhead section of the route.

Cable and power-factor correction conditions

kVA utilisation before correction (%)Percentage of rated apparent power before correction. Cables and breakers are still selected at transformer rated capacity. Single-core LV cable Transformer-to-breaker installation Ambient temperature (°C)Underground: soil temperature. Above ground: air temperature. Target cosφ after correction cosφ before correctionKeep the suggested value if measured data is unavailable. Transformer impedance uk (%)Use the nameplate value when available.

Live-line connection, multiple transformers/MV feeders or special installation conditions

Request a project quotation

Send your project details, BOQ or drawings to request a formal quotation. Fields marked * are required.

Quotation package Contact name * Phone / Zalo * EmailOptional if you prefer a reply by phone. Company / investor Project location * Project name Transformer / total substation capacity (kVA) Substation type Number of transformers Utility supply voltage MV route type Overhead MV (m) Underground MV (m) Target schedule

BOQ / drawing / site-photo linkShare a Google Drive, OneDrive or document link. Please grant viewing access to the recipient. Project requirements

Reference quick estimate

No quick estimate yet. You can still submit a project quotation request.

I consent to the website operator using the information provided to contact me and process this quotation request.

Quotation scope

Applies to one EVN-supplied substation with oil-immersed transformers at 22/0.4 kV (single-phase: 12.7/0.23 kV), with MV metering VTs/CTs supplied by EVN. The estimate includes the selected equipment, installation, earthing, transformer-to-main-breaker connections, design and connection documentation, and coordination of testing and utility acceptance.

Kiosk, integrated steel-pole and indoor substations include MV switchgear and the entered underground cable route. Other outdoor arrangements use the relevant protection configuration. The final diagram must meet the project connection requirements.

Excludes VAT, cables from the substation switchboard to the MSB/loads, live-line work, harmonic reactors, weak-ground treatment or special piling, land and special fire-protection provisions. Underground routes assume normal construction conditions and exclude road drilling and special reinstatement.

Prices are indicative investment budgets. A formal quotation follows site assessment and agreement on the configuration. Electrical selections are preliminary and require design verification before installation.

Capacity range and application conditions

The catalogue defines the enquiry range of this tool, not universal TCVN capacity limits. Single pole-mounted transformers: 15–100 kVA; three-unit banks: 3×15–3×100 kVA. Platform substations: 100–630 kVA. Steel-pole substations: 100–630 kVA; 750/800 kVA require design verification and local approval. Ground-mounted, kiosk and indoor configurations: 50–10,000 kVA. Not every configuration has a package price or the same structural design.

Reference: EVN Decision 1299/QD-EVN dated 3 November 2017, Volume 1, sections 3.3–3.4. Check the current requirements of the responsible utility before implementation. Kiosks must meet manufacturer ratings and testing requirements (IEC 62271-202); indoor and ground-mounted arrangements must meet project layout, ventilation, structural and fire-protection requirements. For multiple transformers, specify the quantity and capacity of each unit.