Solar Quote Comparison Checklist in the UAE: How to Evaluate Installer Bids

Securing multiple bids is standard practice when planning a rooftop solar installation in Dubai and the wider United Arab Emirates. However, comparing competing proposals on a headline price basis alone often obscures critical technical variances, regulatory omissions, and grid connection risks. An offer that appears significantly cheaper may exclude utility permitting, use unapproved hardware, or violate utility capacity thresholds.

Under the Dubai Electricity and Water Authority (DEWA) Shams Dubai framework, solar contractors operate under defined regulatory parameters. This guide provides a systematic six-point checklist to benchmark competing installer quotes, verify contractor credentials, and safeguard your long-term investment.

1. Contractor Enrolment and Training Verification

The first filter in evaluating any quotation is establishing whether the installer holds active utility authorization. In Dubai, only companies that have completed specialized technical training are authorized to submit grid connection applications:

"enrolled electrical drrg solar pv consultants and contractors have undergone the necessary training on dewa equipment and installation regulations and can propose to you a range of solar system solutions"

Unenrolled entities often act as sales intermediaries who subcontract installation works to third parties. This introduces administrative delays and legal ambiguity during utility inspections.

What to check in the bid:

• Does the proposal explicitly state the installer's DEWA DRRG contractor registration number?
• Will the enrolled company directly execute the installation and sign the interconnection agreement, or are works outsourced?

2. Equipment Eligibility and Compliance Certification

Utility interconnection rules mandate that only pre-approved components may be connected to the distribution network. DEWA maintains an active list of eligible equipment, but installers may also propose compliant hardware from other manufacturers:

"the manufacturer should provide a certificate proving that their equipment is compliant with these requirements this certification document will be requested by dewa during the connection process"

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What to check in the bid:

• Are full manufacturer datasheets attached for the proposed photovoltaic panels and inverters?
• Does the installer commit in writing to provide formal manufacturer compliance certificates during the DEWA permitting phase?

3. Sizing Verification Against Connected Load Limits

A common pitfall in aggressive solar proposals is oversizing the DC array beyond what utility regulations permit. Under Shams Dubai rules, system capacity is strictly capped relative to the property's authorized electrical connection:

"the capacity installed cannot exceed the applicable share of the total connected load as per section 2 2 limits to capacity of renewable generators moreover dewa may impose a lower threshold should it be justified by technical limitations"

If an installer proposes a system that exceeds your facility's connected load, DEWA will reject the Stage A permit or mandate expensive grid infrastructure upgrades.

What to check in the bid:

• Has the contractor audited your latest DEWA bill to confirm your property's total connected load?
• Does the engineering design ensure the peak solar capacity remains within the allowable share of that connected load?

4. Annual Generation Modeling vs Consumption Profile

Every quote must provide a realistic simulation of expected annual electricity production. According to DEWA guidance, economic savings must be assessed by directly contrasting generation with historical demand:

"how much your new system will produce on an annual basis and compare that number to your annual electricity demand to get an idea of how much you will save"

Furthermore, installers must design systems in full alignment with official technical standards:

"the details on how the net metering scheme works can be consulted in the drrg connection conditions document available on shams dubai website under publications and resources"

Beware of installers who inflate financial returns by assuming continuous peak generation or neglecting desert derating factors such as high ambient summer temperatures and sandstorm soiling.

5. Multi-Account Offsetting and Commercial Tenant Restrictions

For commercial facilities, residential compounds, or industrial plots with multiple electrical meters, how generated energy is distributed across accounts significantly impacts payback periods.

Under DEWA regulations, multi-account offsetting is strictly governed by a specific hierarchy:

"the account hosting the generator is always the first one and the order of the subsequent ones will be determined by you during the connection application process you can optimise your total invoiced amount by choosing an order where the accounts with the highest consumption are offset first"

However, property owners must recognize legal boundaries regarding commercial tenants. Current legislation prohibits selling or offsetting solar power across independent tenant accounts:

"under current legislation it is not planned to offset electricity produced by a pv plant against electricity consumed by different customers you can only offset electricity consumption of the common areas of the building lighting air conditioning elevators etc"

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What to check in the bid:

• Does the proposal model offsetting across the correct hierarchy of accounts on the same land plot?
• If quoting a multi-tenant commercial property, does the scope restrict generation offsets to common areas (chillers, lighting, pumps)?

6. Export Credit Rollover and Financial Terms

A sound financial evaluation requires understanding how utility net billing credits are treated. Solar incentives in the UAE operate exclusively through bill reduction rather than direct cash payouts or tax subsidies:

"the resolution also stipulates that the producer shall not be paid any money for the excess electricity and set off between this surplus and the imported energy shall be limited in accordance with the provisions of the resolution and the regulations adopted by the authority in this regard"

Furthermore, prospective buyers should verify that tax credits are not erroneously included in ROI projections:

"no tax or other incentives are currently being offered"

When your photovoltaic system produces surplus energy during sunny daylight hours, that energy exports to the grid and accumulates as a billing credit:

"if during a billing period more energy is exported than imported the invoiced value of electricity will be zero and the surplus electricity will be shown as a credit which can be brought forward in the following billing period"

Importantly for long-term project viability, these surplus credits do not expire at the end of the calendar month or year:

"if during the course of several consecutive months more energy is produced than imported from the grid the credit accumulates and is carried over to the following months"

"an indefinite rollover is applied so any surplus will be carried forward to the next bill"

Summary Comparison Matrix

Use this scorecard when reviewing three competing installer bids:

By systematically verifying each of these six criteria, building owners can confidently select the solar contractor that offers the strongest technical execution, regulatory certainty, and authentic long-term value.