How to Compare Commercial Solar Proposals in Malaysia

Give each provider the same bills and requirements

Differences between quotes are only informative if providers have been given the same starting information. A revised shift schedule or expansion plan can change the recommended size and savings, making two otherwise reasonable forecasts look inconsistent. Sending the same bills, operating details and updates helps isolate differences in the offers themselves.

Different inputs can produce different recommendations even when both providers are competent. If one assumes a new shift and another uses the current schedule, their savings estimates cannot be compared without adjustment.

Agree your priorities before requesting quotes. Tell providers your budget, required investment return, production restrictions and maintenance requirements. Giving everyone the same brief helps prevent differences caused by providers quoting for different work.

Compare DC and AC capacity separately

Matching panel counts do not establish that two providers are offering the same electrical design. Module ratings and inverter capacity can differ, affecting output and cost. Recording panel capacity in kWp alongside inverter AC capacity, models and quantities gives you a basis for understanding those differences before comparing price.

Two offers with the same panel count may use different module ratings. Two arrays with the same DC capacity may also have different inverter arrangements and generation assumptions.

If panel or inverter capacities differ, ask each provider why. Compare the effect on expected generation, direct use and price. Different designs can be valid, but their benefits need to be explained using your site’s electricity demand and connection requirements.

Examine the generation forecast

Expected generation is a major input to projected savings, so an optimistic forecast can make an offer look financially stronger without changing its price. Monthly and annual output should be supported by the proposed layout, sunlight data, shade and loss allowances. Comparing those inputs helps explain whether a higher forecast is justified rather than simply more favourable.

If one proposal forecasts materially more electricity from a similar array, identify the reason. It may use different equipment, loss assumptions, orientation or resource data.

If one provider forecasts more generation, ask which inputs explain the difference. It might use different shading, loss or downtime allowances. Compare those inputs before accepting the forecast that produces the shortest payback.

Separate direct use from surplus

The same generation total can produce different savings depending on how much the factory uses directly. Output during weekends or shutdowns may become surplus, with a different financial treatment from avoided grid purchases. A fair comparison therefore separates direct use and surplus instead of applying one savings rate to every unit.

The proposal must identify the programme route and applicable export treatment. A forecast based on full retail value for every generated unit should not be compared directly with one using separate values for direct consumption and eligible export.

Ask both providers to use the same operating profile when testing alternatives. This makes it easier to see whether the difference comes from the design, pricing or the financial assumptions used to value the electricity.

List included project responsibilities

A price difference may reflect work included in one offer but left to the customer in another. Applications, studies, electrical work, testing and handover all affect the cost of getting a system into operation. Identifying responsibility for those tasks makes the quoted total a more reliable guide to what the business will actually spend.

Mark each item as included, excluded, conditional or awaiting confirmation. Do not treat a blank cell as an inclusion.

Verdant Solar’s commercial proposal separates authority management, project management and equipment. Use those categories to check what each quote includes. Ask other providers to identify the equivalent work and any tasks the customer must arrange or pay for separately. Use the factory solar proposal checklist to check that the offer states these responsibilities.

Compare the ownership cost

The purchase price is not the full cost of keeping the system operating. Servicing, connectivity, insurance and later replacements can differ between offers, particularly after an included-service period ends. A comparison covering those costs over the same number of years can explain why the cheapest installation is not necessarily the lowest-cost ownership option.

For a third-party model, include the ongoing energy or lease payments and the costs that remain with the customer. A zero-upfront offer is not directly comparable with an equipment purchase price alone. Compare the commercial solar financing options using total payments, ownership and the obligations in the actual agreement.

Use the same number of years for each cost comparison. State whether tax benefits are included and check any assumed tariff increases. Finance should be able to trace the quoted savings back to the electricity calculation and the costs listed in the offer. See how to calculate commercial solar savings using the factory’s actual electricity records.

Understand warranties and service commitments

Warranty length alone does not tell you which problems a provider will handle or what a claim might cost. Equipment warranties, any output commitments and workmanship cover address different things. Keeping them separate helps you compare the party responsible, applicable conditions and service costs rather than choose on the largest number of years.

Warranty years alone do not explain labour, transport, access equipment or the process for replacing an unavailable component. Ask which costs are included in the assessed offer.

Check who monitors output, responds to alerts and sends reports. For maintenance, ask for the listed activities and charges rather than assume panel cleaning is the full service. Confirm these commitments in the agreement you would sign.

Review delivery and changes

Delivery dates affect the comparison when savings are expected to start at a particular time. An early completion estimate may depend on approvals, equipment availability or factory access that another provider has allowed for more explicitly. Reviewing those dependencies helps distinguish a supported schedule from an attractive date that has not accounted for the same work.

Ask how variations are proposed and approved. A change in equipment or capacity should update the relevant design and financial information, not only the material list.

Keep a record of clarifications from each provider. The final decision should use the clarified scope rather than the first brochure, while the signed documents should reflect the commitments that influenced selection.

Choose using the differences that matter to your business

Once the offers have been clarified, the choice should reflect the differences your business values. A comparison table can bring price, expected savings, service costs and included work together, but weighting every feature equally can obscure the priorities management actually set. The preferred offer should be explainable in terms of those priorities and the remaining risks.

Before selecting an offer, check that operations accepts the consumption figures, finance accepts the costs and facilities understands the service responsibilities. Resolve any estimate that could materially change the preferred option before approval.

Verdant Solar can provide a commercial proposal that connects the equipment, project responsibilities and financial scenarios. The goal is a decision that finance, operations and facilities can understand together.

Resolve gaps before scoring the price

If one provider includes an application task and another leaves it unspecified, obtain a written clarification before assigning a price score. The same applies to servicing, monitoring access or customer-supplied electrical work. An unknown item is not evidence of either inclusion or exclusion.

After clarifying missing work, update the comparable cost and record any remaining differences. If you choose a higher-priced offer, state which included work or terms justify it. Keep the final comparison and written clarifications with the approved proposal so the decision can be checked later.