Terms and Conditions of Sale and Installation

Domestic Battery Energy Storage Systems

Ref: Energy2 Ltd Terms and Conditions v6.0 — Domestic Applies to: Energy2 Black 17 and Energy2 White 16 battery systems Issued: 13 August 2026

1. Definitions

In this document, the following words shall have the following meanings:

• "Company": Refers to Energy2 Ltd, registered in England with company number 13668568 of Fourthtime, Grubbins Lane, Speen, Princes Risborough, Buckinghamshire, HP27 0SH.

• "Customer": The person or entity who purchases the Goods and Services from the Company for domestic use.

• "Goods": All equipment supplied by the Company under this Contract, comprising the Battery Pack and any Third-Party Equipment.

• "Battery Pack": The Energy2 lithium iron phosphate (LFP) battery manufactured by the Company and specified in the Quotation — the Energy2 Black 17 LFP Battery Pack (17kWh) or one or more Energy2 White 16 Rack Battery modules (16kWh each) — including housing and Battery Management System (BMS).

• "Applicable Battery Warranty": The Energy2 Battery Warranty for the Battery Pack specified in the Quotation, in the version in force at your Commissioning Date. Current and previous versions of all warranties are published at energy2.co.uk/docs.

• "Third-Party Equipment": Inverters, cabling, switchgear and other equipment manufactured by third parties, supplied and installed by the Company as itemized in the Quotation. Third-Party Equipment is not manufactured by the Company and carries its manufacturer's warranty (see Section 8.2).

• "Energy Storage System" (or "System"): The complete installed system created by the Services at the Premises, comprising the Battery Pack and any Third-Party Equipment.

• "Services": The installation, commissioning, and testing of the Goods at the Premises.

• "Premises": The location where the installation is to take place.

• "Contract": The agreement between the Customer and the Company for the supply and installation of Goods.

• "MCS": The Microgeneration Certification Scheme.

• "Quotation": The written proposal provided by the Company to the Customer.

• "Installation Address": The address specified in the Quotation where the Goods are to be installed.

• "Deposit": The initial payment required to secure the order, as specified in Section 4.2.

• "Financial Protection Product": The MCS-approved financial protection product purchased by the Company on the Customer's behalf, as named on the Customer's MCS certificate (see Section 4.4).

2. Quotations and Orders

2.1. All Quotations are valid for a period of 30 days from the date of issue.

2.2. A Contract is formed when the Customer accepts the Quotation in writing and pays the required Deposit.

2.3. All prices, dimensions, specifications, and descriptions given in the Quotation are accurate at the date of issue. System performance estimates are prepared in accordance with the MCS Pre-sale Information and System Performance Estimate Standard; they are estimates based on stated assumptions, not guarantees of performance. The Contract covers the items specifically itemized in the Quotation's cost breakdown. If quoted materials become unavailable, the Company may propose substitute materials of equivalent or better specification at no additional cost; substitutions will be confirmed with the Customer before installation.

2.4. Clarifications & Exclusions

Unless specifically stated, the Quotation does not include:

• Provision of scaffolding or on-site storage.
• Protection of equipment while stored on site or after installation.
• Costs resulting from encountering asbestos.
• Costs of, or works leading from, structural surveys.
• Decorating work or repairs to plastering/tiling.

3. Your Right to Cancel (Cooling-Off Period)

3.1. In accordance with the Consumer Contracts Regulations 2013, you have the right to cancel this Contract within 14 days without giving any reason.

3.2. To exercise this right, you must inform us by a clear statement (e.g., email or letter).

3.3. If you request installation to commence during the cooling-off period and subsequently cancel, you will be liable for reasonable costs for work done.

4. Price and Payment

4.1. The Price is stated in the Quotation.

4.2. Payment Schedule

• Deposit: 25% of the total Contract price to secure the order.

• Advance Payment: 25% due prior to the delivery of Goods / commencement of works.

• Final Balance: 50% due immediately upon successful commissioning (as certified by the Company's technician and documented on the commissioning certificate).

4.3. Title

Title to the Goods shall not pass to the Customer until both: (a) the Company has received payment in full; and (b) the Goods have been successfully commissioned at the Installation Address by the Company's authorized technician.

4.4. Financial Protection (MCS)

For every domestic installation, the Company purchases an MCS-approved Financial Protection Product on the Customer's behalf at no additional charge. This provides a minimum of six years' cover from installation for remediation of installation issues where a resolution cannot be secured through the Company, including if the Company ceases trading. The provider is named on the Customer's MCS certificate, and product details are provided in the handover pack. This product is a remediation guarantee and does not constitute deposit or advance-payment protection.

5. DNO Approval

5.1. All installations are subject to Distribution Network Operator (DNO) approval.

5.2. The approval process typically takes up to 45 working days.

5.3. An installation completion date will be confirmed only once DNO approval is granted.

5.4. DNO Refusal

If the DNO refuses approval for the installation, the Customer may cancel the Contract and receive a full refund of all payments made, less any reasonable costs already incurred by the Company (such as survey costs), which will be itemized in writing. The Company will notify the Customer within 7 days of receiving a DNO refusal.

6. Site Survey and Installation

6.1. MCS Compliance

Installations are carried out in accordance with the MCS Installation Standard for Battery Storage under the redeveloped MCS Installer Scheme, the MCS Installer Operating Requirements and the MCS Customer Commitment. The Company will register the installation on the MCS Installations Database and issue the MCS certificate within 30 calendar days of commissioning, and will provide the Customer with a full handover pack.

6.2. Schedule

Installation generally takes place 0800-1700, Mon-Fri.

6.3. Customer Obligations

Provide safe access, free use of electricity/water, and a suitable environment.

6.4. Delays

The Company is not liable for delays caused by force majeure or supply chain disruptions.

6.5. Planning Permission and Consents

It is the Customer's responsibility to obtain, prior to work commencing, all necessary planning permission and any other consents required for the installation (including, where applicable, listed building consent, conservation-area requirements, and landlord or freeholder consent). The Company may assist with information on request but gives no warranty that permission or consent is not required. The Company is not liable for any costs, delays or enforcement action arising from the Customer's failure to obtain a required permission or consent, and any resulting cancellation will be treated in accordance with Section 3 or, after the cooling-off period, may incur reasonable costs for work done.

7. Supplementary Terms for Energy Storage Systems

7.1 Nature of the Battery Pack

• Energy2 Black 17: Where the Quotation specifies the Energy2 Black 17, the Battery Pack is a UK-manufactured product assembled by the Company, incorporating components and firmware that benefit from continuous improvement between manufacture batches.

• Energy2 White 16: Where the Quotation specifies the Energy2 White 16, the Battery Pack is a series-manufactured rack battery module supplied and configured by the Company.

• Statutory Rights: Nothing in this Section 7 affects the Customer's statutory rights, including the right to goods of satisfactory quality under the Consumer Rights Act 2015.

• Updates & Upgrades: The Company warrants the Battery Pack against defects as per the Applicable Battery Warranty. However, the Customer acknowledges that future hardware generations may be released. The Company is not obliged to provide free hardware upgrades to newer model generations unless the original Battery Pack is verified as defective under the Applicable Battery Warranty.

• Continuous Improvement: The Company warrants that the Battery Pack complies with all essential safety requirements of the Electrical Equipment (Safety) Regulations 2016. Minor improvements to aesthetic features (such as chassis finish) and non-critical firmware features may be introduced between manufacture batches; no such change will reduce the safety, warranted performance or functionality described in your Quotation and the product Datasheet, which form the contractual description of the Goods.

7.2 Dangerous Goods and Transport Restrictions

• Hazardous Classification: The Battery Pack contains large-format Lithium Iron Phosphate (LFP) cells and is classified as Class 9 Miscellaneous Dangerous Goods (UN 3480). This Section 7.2 applies to the Battery Pack; it does not restrict Third-Party Equipment, which may be transported normally.

• Prohibition on Customer Transport: The Battery Pack's cells are tested to UN38.3 and IEC 62619 (the Energy2 White 16 module is additionally CE marked and certified to UN38.3 and IEC 62619 at module level), and the Company transports the Battery Pack under its documented dangerous goods procedures in accordance with the Carriage of Dangerous Goods regulations (ADR/CDG). Because compliant carriage of Class 9 goods requires trained personnel, approved packaging and documentation, the Customer is strictly prohibited from transporting, relocating, or shipping the Battery Pack themselves. The Battery Pack must not be placed in the postal system, handed to a standard courier, or transported in a private vehicle.

• Collection-Only Returns: In the event of a fault, return, or cancellation, the Customer must not attempt to return the Battery Pack. The Company will arrange for collection using specialized transport. Any attempt by the Customer to ship the Battery Pack independently will be a material breach of this Contract and may expose the Customer to criminal liability.

7.3 Installation and Commissioning (Critical)

• Supply and Install Only: This Contract is for the supply of the Goods and their installation as a complete Energy Storage System, as a single service. The Company does not supply the Battery Pack on a "supply-only" or "cash-and-carry" basis.

• Commissioning Requirement: As specified in Section 4.3, title to the Goods shall not pass until the Company's authorized technician has successfully commissioned the System at the Installation Address and payment has been received in full.

• Location Stability: The System is installed as a Fixed Installation. The Customer must not move, disconnect, or reinstall the System or any part of it at a new location. If relocation is required, the Customer must contract the Company to perform the relocation.

7.4 Compatibility and Third-Party Equipment

• Inverter Compatibility: The Battery Pack is designed to be functionally compatible with specific third-party inverters (e.g., Solis, Sunsynk, Victron) via specific CAN-bus protocols.

• No Third-Party Endorsement: The Customer acknowledges that the Company is an independent manufacturer and is not an "approved partner" of inverter manufacturers unless stated.

• Third-Party Inverter Warranty Risk: If the Customer's inverter was purchased separately (not from the Company), connecting our Battery Pack may affect the inverter manufacturer's warranty coverage. Some manufacturers exclude damage caused by, or refuse claims involving, third-party batteries. The Company cannot be held liable for any loss of inverter warranty coverage in such cases.

• Inverter Warranty Protection: For inverters purchased from the Company as part of this Contract, this risk does not apply—the Company provides direct Inverter Warranty Protection (see Section 8.2) and will handle all inverter warranty claims on the Customer's behalf.

• Configuration Settings: The Battery Pack's settings (including "dip switches" and BMS parameters) are configured by the Company. The Customer is strictly prohibited from altering these settings. Any alteration of dip switches, BMS firmware, or internal wiring by the Customer will: (a) Immediately void the Applicable Battery Warranty; and (b) Release the Company from all liability regarding system safety, fire risk, or performance.

7.5 Specific Liability Limitations

• Operational Interruption: The Company shall not be liable for any indirect or consequential loss, including loss of energy generation, loss of export tariff payments (e.g., SEG), or reliance on battery backup power during grid outages, arising from Battery Pack firmware updates, "Safe Mode" activation, or compatibility issues with third-party inverters.

8. Warranties

8.1. Workmanship

The Company provides a 6-year workmanship warranty from the date of commissioning, in line with the redeveloped MCS Installer Scheme. This warranty is transferable to a new owner if the property is sold. It is supported by the MCS-approved Financial Protection Product (Section 4.4), which funds remediation of design or workmanship failures for at least six years if a resolution cannot be secured through the Company, including if the Company ceases trading.

8.2. Equipment Warranties

• Inverters: Covered by the Manufacturer's warranty (e.g., Solis/Sunsynk). The Company will act as the Customer's agent to process warranty claims with the manufacturer.

• Inverter Warranty Protection: If the inverter manufacturer declines a warranty claim and the use of the Battery Pack is cited as a contributing factor, the Company will repair or replace the inverter at no additional cost. This protection: (a) applies only to inverters purchased from the Company as part of this installation; (b) remains valid for the duration of the manufacturer's original warranty term; (c) requires the Customer to provide reasonable evidence of the manufacturer's refusal (such as correspondence or a claim reference); and (d) requires the Customer to have complied with all other terms of the inverter manufacturer's warranty (this protection only covers refusals specifically citing the Battery Pack as a factor). If the original inverter model is discontinued, the Company will provide a functionally equivalent model. Claims under this protection must be submitted within 30 days of the manufacturer's refusal.

• Battery Pack: Covered by the Applicable Battery Warranty — the Energy2 Black 17 Battery Warranty or the Energy2 White 16 Battery Warranty, as specified in the Quotation. The version in force at your Commissioning Date applies; current and previous versions are listed at energy2.co.uk/docs.

8.3. Warranty Condition

The Company's voluntary warranties (Sections 8.1 and 8.2) are conditional on payment being made in full. This condition does not apply to, limit or affect the Customer's statutory rights under the Consumer Rights Act 2015 or the cover provided by the Financial Protection Product.

9. Servicing, Safety, and Care Requirements

9.1. Environment

The Customer must ensure the Battery Pack is not subjected to outdoor usage, excessive dust/humidity, or extreme temperatures.

9.2. Maintenance

• Do not move, open, or service the Battery Pack.

• Visual Check: Complete a visual check monthly.

9.3. Charging & Care

The Customer should avoid allowing the Battery Pack to remain at 0% charge for extended periods (more than 14 days for the Black 17; more than 7 days for the White 16), as this may cause cell degradation. If a power outage occurs while the property is unoccupied, the Customer should restore power as soon as reasonably practicable upon becoming aware. Cell damage caused by prolonged deep discharge may not be covered under warranty, except where the discharge resulted from a fault in the Battery Pack itself.

9.4. Service Interval

The Company recommends the Battery Pack is serviced every 3 years by the Company or a competent person approved by the Company. Servicing by the Company is chargeable (indicative cost provided in the Warranty terms, subject to inflation). Any warranty conditions relating to servicing are as set out in the Applicable Battery Warranty.

9.5. Internet

The Customer should use reasonable endeavours to maintain an internet connection for remote monitoring and diagnostics. Temporary outages do not affect warranty coverage, but extended disconnection (exceeding 90 consecutive days) may limit the Company's ability to provide remote support and firmware updates.

9.6. End-of-Life, WEEE and Safe Disposal

As a producer of industrial batteries and an installer of electrical equipment under the UK WEEE Regulations 2013 and the Waste Batteries and Accumulators Regulations 2009, the Company is committed to the safe and environmentally sound disposal of waste. The Battery Pack and other electrical equipment must not be disposed of with general household or commercial waste, or placed in standard portable-battery recycling bins.

• Batteries: Waste batteries supplied by the Company will be collected free of charge and treated in accordance with the UK Battery Regulations. Collection of the Battery Pack is arranged exclusively by the Company in accordance with Section 7.2.
• Replacements: If we install new equipment (e.g., PV panels or inverters) to replace existing equipment, we offer a free take-back service — we will remove your old equivalent electrical items free of disposal charges and ensure they are treated at an Approved Authorised Treatment Facility (AATF).
• New installations: Any packaging or waste generated by our team will be removed and recycled where possible.
• Removal costs: While recycling is free under producer responsibility laws, a labour/transport charge may apply for the physical removal of goods from your roof or premises if not already included in the installation Quotation.

Lithium batteries can present a serious fire and chemical hazard if damaged or disposed of incorrectly. Full details, including safe-handling guidance, are in our WEEE & Battery Compliance Statement, or contact hello@energy2.co.uk / 0800 112 6345.

10. General Liability

10.1. Nothing in these Terms limits or excludes liability for:

• (a) death or personal injury caused by negligence;
• (b) fraud or fraudulent misrepresentation;
• (c) breach of the terms implied by Section 12 of the Sale of Goods Act 1979 (title and quiet possession);
• (d) breach of the terms implied by Sections 13–15 of the Sale of Goods Act 1979 (description, quality, fitness for purpose); or
• (e) defective products under the Consumer Protection Act 1987.

10.2. Subject to Section 10.1 and Section 7.5, the Company's total liability for all other claims is limited to the value of the Contract.

10.3. Statutory Rights

These Terms do not affect your statutory rights under the Consumer Rights Act 2015. For further information about your statutory rights, contact your local Citizens Advice Bureau or Trading Standards office.

11. Data Protection

11.1. ICO Registration Number: ZC011630. Use of personal data is for contract performance and certification only. Our privacy notice is available at energy2.co.uk/docs/privacy_policy.html.

11.2. Network access credentials will only be changed in consultation with the Customer.

12. Complaints

12.1. If you have a complaint, please contact us in writing at: Energy2 Ltd, Fourthtime, Grubbins Lane, Speen, Princes Risborough, Buckinghamshire, HP27 0SH, or by email to hello@energy2.co.uk.

12.2. We will acknowledge complaints within 2 working days and provide a formal response within 10 working days, in accordance with our Complaints Policy (available on request).

12.3. If we cannot resolve your complaint to your satisfaction, you may escalate it to MCS, the central point of contact for complaints about MCS certified installers, who provide free alternative dispute resolution where a complaint cannot otherwise be resolved. Where the complaint relates to a matter covered by the Financial Protection Product, you may also contact the provider named on your MCS certificate. Nothing in this section prevents you from bringing a claim in the courts.

13. General Provisions

13.1. Severability

If any provision of these Terms is found by any court or authority to be invalid or unenforceable, the remaining provisions shall continue in full force and effect.

13.2. Entire Agreement

These Terms, together with the Quotation and any documents expressly incorporated by reference (including the Battery Pack Warranty), constitute the entire agreement between the parties.

13.3. Subcontracting

The Company may subcontract any of its obligations under this Contract to suitably qualified third parties, but shall remain responsible for the performance of such obligations.

13.4. Transfer

The Customer may not transfer or assign this Contract without the Company's prior written consent, such consent not to be unreasonably withheld. The Company may transfer this Contract to a successor business.

14. Governing Law

Governed by the laws of England and Wales. Exclusive jurisdiction of the courts of England and Wales.

Acceptance of Order By signing below, the Customer accepts these Terms and Conditions (v6.0).

Signed (Customer): __________________________ Date: ____________