What Johor Homeowners Should Prepare Before a Solar Site Assessment

Updated 22 September 2026 · Publisher: Inhome Solar Sdn Bhd

People often begin a solar enquiry with one question: how many panels can fit? For a proper site assessment, that is usually not the first question. The useful starting point is the property as it exists today, the way electricity is used, and the changes that may happen after the installation.

Inhome Solar's current contact page lists Inhome Solar South in Senai and an Inhome Solar Specialist entry in Batu Pahat [1]. If you are in Johor, use those public contact details to ask which team should handle your property. A branch listing is a contact route; it is not a remote verdict that a roof is suitable.

Start with the TNB bill, not a neighbour's quotation

Send the latest TNB bill before the meeting. If the household has changed recently, include one or two earlier bills so the consultant can see whether the current number is typical. You can cover the account number and other personal details that are not needed for an initial review.

Also explain what sits behind the number. Is the house occupied during the day? Are air-conditioners, a water pump, freezer, home office or EV charger used mainly in daylight hours? Does the property have a domestic account, or is the electricity use tied to a business activity? TNB's Solar ATAP information explains that tariff treatment depends on the activity and supply voltage shown in the electricity account, so the bill is more useful than a monthly total copied into a message [3].

Do not convert the bill into a final system size yourself. The bill gives the assessor a starting point. It does not replace a roof, electrical or connection review.

Take roof photographs that show the difficult parts

Begin with wide photographs from the ground. Show the roof edges, ridges, different roof faces, nearby trees, water tanks, satellite dishes and any area that is hidden from the street. Add a closer photograph only when it helps show a crack, obstruction, access point or roof change that a wide image cannot explain.

Try to photograph the roof at more than one angle and say which part of the property each image shows. Crop out house numbers, documents, vehicle plates and unnecessary views into a neighbour's property before sharing the files. Clear photographs help the team decide what still needs to be checked in person; they should not be used to claim that a roof is safe from a phone screen.

For another view of the same preparation idea, see Inhome Solar's earlier note on what roof photographs can tell a solar consultant before a site visit. The point is not to make the homeowner perform the site survey. It is to make the first conversation more honest.

Show the route from the roof to the electrical area

A roof photograph alone leaves out the part of the installation that many first enquiries never show. Take a separate photograph of the meter, distribution board and the surrounding wall. Include the available working space and the likely route between the roof, the inverter position and the electrical equipment.

A close-up of a label is rarely enough. The assessor also needs to understand access, wall condition, cable routes and whether renovation work could move the equipment later. Inhome Solar's earlier article on the electrical information an installer needs before design is a useful companion read.

Tell the team what may change after the visit

Say if the roof may be replaced, the house may be extended, an upper floor is planned, or the distribution board will move during renovation. Mention planned air-conditioners, a heat-pump water heater, an EV charger or a change from a mostly empty house to a busier one.

This does not mean you need to ask for a larger proposal. It gives the assessor information that can affect access, cable routes, inverter space and daytime electricity use. A design that fits today's property may need a different conversation if the roof or the way the house is used will change soon.

Ask which current application route applies

Old NEM wording still appears in online discussions and older quotations. TNB says Solar ATAP was introduced on 1 January 2026 as a continuation of the NEM programme, which ended on 30 June 2025 [3]. SEDA's current information also dates Solar ATAP to 1 January 2026 and says applications use its eATAP system with a SEDA-registered Registered Photovoltaic Service Provider, or RPVSP [4].

Ask the provider which route applies to the TNB account, who will submit the application and what the quotation includes. TNB also states that a technical assessment study is a prerequisite for approval of a solar application [3]. That is why a site assessment is more than a quick look at roof area. It connects the property, electrical supply and the current process.

Inhome Solar's public services page lists solar installation, documentation and TNB application support, operations and maintenance, and consultancy advisory work [2]. Ask the team to state which of those steps is covered by the next written document. A site review, an application submission and post-installation paperwork are not the same thing.

Make the first Johor message easy to answer

Put the latest TNB bill, roof photographs, meter and distribution-board photographs, property type, daytime usage pattern and planned changes in one message. Add your town in Johor and say what you want the assessment to settle: roof access, electrical route, the current application path or the next written step.

If the roof cannot be photographed clearly, say so. A request for a site visit is better than a confident conclusion based on a partial view. The aim of the first message is to give the right people enough context to ask the next useful question.

Sources used

Publisher: Inhome Solar Sdn Bhd · Updated: 22 September 2026 · Roof suitability, structural attachment, electrical design, installation details, testing and any applicable approval remain subject to the responsible qualified professionals and the conditions of the property.