Two calls reach an EPC in the same week. A cold store owner wants a plant that cuts a power bill that never falls to zero at night. A warehouse owner has 20,000 square metres of light metal roof and a small load. Both call it industrial rooftop solar. The design problems are opposite. The cold store is limited by what its load can absorb and by its compressor starts. The warehouse roof can hold more solar than the building can use.
Quick answer. Solar for cold storage is sized from the load profile, the compressor starting duty and the insulated roof. Refrigeration runs through the night, while most solar energy arrives by day. A warehouse is limited by export rules and the structural reserve of its roof, because its load is small. Settle the tariff category first, then the structure, then whether a battery earns its place.
This guide is for an Indian EPC bidding a cold storage or warehouse job. It sits in our battery energy storage hub because storage decides much of the answer. For metal roof detail it builds on our tin shed solar design guide and does not repeat it. Every state tariff figure below comes from an order we opened, and each carries its date.
How do cold storage and warehouse solar projects differ?
They differ in what caps the plant. Get this wrong and the quote is wrong, whatever the module count.
| Question | Cold store | Dry warehouse | Logistics park with many tenants |
|---|---|---|---|
| What caps plant size | Load that runs in daylight, plus compressor starts | Export rule, transformer and roof reserve | Metering and ownership model, then roof reserve |
| Load shape | Runs 24 hours, seasonal | Light and mostly daytime | Mixed, tenant by tenant |
| Typical roof | RCC slab with insulation, insulated panel, or steel shed | Light PEB or metal sheet | Several PEB sheds |
| First tariff question | Agricultural or industrial category | Commercial or industrial category | Whether a park or industrial category applies |
| Battery case | Worth testing | Weak, because the load is small | Case by case |
PEB means pre-engineered building, a steel frame with cold-formed purlins and profiled sheet. A multi-tenant park raises a separate question of who owns the plant and who is billed. Our guide to virtual and group net metering in India covers that side. The rest of this guide follows the split in the table.
What load profile should solar for cold storage assume?
The public load numbers we could source for an Indian cold store sit in a standards document, not a marketing page. The National Horticulture Board (NHB) published technical standards for cold storage Type 01 with a typical design for a 5,000 MT potato store. It has four chambers of 1,250 MT each. The plant uses ammonia and reciprocating compressors with 55 kW motors (NHB Technical Standards, Cold Storage Type 01, Section 4 Option A). We use its figures as the load basis because they are sourced. They are a type design, not a measurement of any client’s store.
| Period in the NHB design | Operating load, kW (brake) | Compressors, kW | Condenser pumps, kW | Air cooling units, kW | Energy per day, kWh | Compressor hours per day |
|---|---|---|---|---|---|---|
| Peak, 15 Feb to 15 Mar | 125.35 | 91 | 6.29 | 21.36 | 2,005.6 | 20 |
| Holding, to end October | 60.47 | 45.3 | 3.145 | 7.32 | 870.78 | 18 |
| Lean | 38.68 | 27.18 | 3.145 | 3.66 | 557.11 | 18 |
The overfeed system adds 4.7 kW in all three periods, and lighting adds 2 kW in the peak period only. NHB reports the energy per day with a diversity factor of 0.8. The loads are brake kW, which is shaft power, so motor losses make grid import a little higher.
Four things follow for the solar design.
- Compressors are about three quarters of the load. They take 91 of 125.35 kW at peak and 45.3 of 60.47 kW in holding. Their starts and loading drive everything else.
- The load is seasonal. Daily energy falls by more than half between the loading peak and holding. NHB’s design holds product until the end of October.
- The load does not stop at sunset. NHB spreads the heat load across 24 hours of operation. About half of the day has no sun.
- Fans are a quiet saving. In holding, the NHB design runs fans at about 70 percent speed on a variable frequency drive. That cuts fan motor power to about 34 percent.
NHB also asks for a power factor of at least 0.95 and a diesel generator for standby. It suggests one large set for pull-down and a smaller one for holding. A battery does not replace that generator. It answers a different question, covered below.
For a real bid, ask the owner for 12 months of 15-minute interval data and the compressor schedule with nameplates. Monthly bills hide the shape that decides the design. Our BESS sizing guide explains why interval data matters.
How much of the solar energy does a cold store use?
Less than the roof suggests, and it depends on the season. This worked example is illustrative. Every input is an assumption except the NHB loads.
Assumptions (illustrative).
- Roof-limited plant of 170 kWp. The four NHB chambers alone cover 1,344 square metres (4 x 21 m x 16 m). We take 75 percent as usable and 6 square metres per kWp for a flush array with aisles.
- Yield of 4.5 kWh per kWp per day, so 765 kWh per day. Replace this with a PVsyst result.
- Solar output follows a half sine from 06:00 to 18:00.
- The load is flat across 24 hours at the NHB daily energy divided by 24.
- Each hour, solar energy used on site is the smaller of solar output and load.
| NHB period | Average load, kW | Load per day, kWh | Solar used on site, kWh | Share of solar used | Share of load met by solar | Surplus solar, kWh |
|---|---|---|---|---|---|---|
| Peak | 83.6 | 2,006 | 717 | 94% | 36% | 48 |
| Holding | 36.3 | 871 | 389 | 51% | 45% | 376 |
| Lean | 23.2 | 557 | 258 | 34% | 46% | 507 |
Read the table three ways.
First, in the loading peak the plant is almost fully used, yet it meets only about a third of the load. The compressors run hard and the roof is small against them.
Second, in holding, half of the solar energy has no load in the hour it is made. In this model, doubling the plant to 340 kWp lifts solar used on site only from 389 to 415 kWh. The surplus grows from 376 to 1,115 kWh. Size the plant for the holding season, not for the annual kWh.
Third, the flat load is the weakest assumption. Warm afternoons raise refrigeration load. Suppose 45 percent of the holding load falls between 09:00 and 17:00 instead of the flat 33 percent. Solar used on site then rises from 389 to 467 kWh, and the share used rises from 51 to 61 percent. The interval data decides which case you are in.
What happens to the surplus depends on the state and the connection. It may be exported under net metering, curtailed, or absorbed by storage. Our zero export solar design guide covers the control side. Before the load data arrives, a bid needs roof area, shading and a first energy estimate. That is the job of solar 3D pre-design, which covers bid-stage 3D layouts, shading analysis and PVsyst energy estimates.
A warehouse inverts the picture. Take a 20,000 square metre roof, again with 75 percent usable and 6 square metres per kWp. That gives about 2,500 kWp and 11,250 kWh per day at 4.5 kWh per kWp. A dry warehouse that averages 150 kW uses 3,600 kWh per day. Both figures are illustrative. The roof is not the limit here. The export rule, the transformer and the structural reserve are.
Which roof will carry the array?
The roof type decides the first structural question. Cold storage stores meet three types, and warehouses mostly meet the third.
| Roof type | Where you meet it | First check |
|---|---|---|
| RCC slab with insulation and a weather course | NHB’s type design applies 150 mm of expanded polystyrene on a civil building roof | Slab capacity and waterproofing, then ballast or anchors (see our flat roof racking guide) |
| Insulated sandwich panel roof on steel purlins | MIDH guidelines give preference to cold storage with PUF panel insulation | The panel maker’s written load and span data, and fixing into the purlins |
| Steel shed, PEB or metal sheet | Warehouses, docks, plant rooms and sheds over cold stores | Purlin and frame reserve, then sheet fasteners |
The MIDH reference is the Mission for Integrated Development of Horticulture, Operational Guidelines 2025, paragraph 7.48 (MIDH Operational Guidelines 2025, dated 31.12.2024).
What wind checks can you show on a PEB or metal sheet roof?
The governing Indian wind code is IS 875 (Part 3): 2015, Wind Loads (Third Revision), from the Bureau of Indian Standards, April 2015. Its full title is Design Loads (Other than Earthquake) for Buildings and Structures, Code of Practice. The public copy we read lists amendments of 2016 and 2020 (IS 875 Part 3 public copy). Confirm the amendment status in the BIS catalogue before you issue a calculation note. Our IS 875 glossary entry and solar wind load guide cover the full method. For a cold store or warehouse, the checks run in this order.
- Get the design basis. Ask the PEB vendor for the code editions, basic wind speed, collateral and imposed load allowances and the purlin and rafter sections. If the drawings are missing, measure on site.
- Compute the pressure. Design wind pressure is Pz = 0.6 Vz squared in N per square metre. The design pressure is Pd = Kd x Ka x Kc x Pz, never less than 0.70 Pz (clause 7.2).
- Load each element for its own case. Clause 7.1 asks for three checks. They are the building as a whole, each structural element, and the cladding units with fixings. The local pressure concentration coefficients are for sheeting and fixings. They are not for whole structural elements (clause 7.3).
- Use the right area for purlins. For beam elements such as purlins, the tributary area is effective span times spacing (clause 7.2.2.1). The area averaging factor Ka is 1.0 up to 10 square metres. It falls to 0.9 at 25 and 0.8 at 100 or more (Table 4).
- Pick the internal pressure case. Use plus and minus 0.2 where openings are below about 5 percent of wall area. Medium openings of 5 to 20 percent use plus and minus 0.5. Openings above 20 percent use plus and minus 0.7 (clauses 7.3.2.1 and 7.3.2.2). A dock with doors open may fall in the larger cases, so check it.
- Add the existing loads. Include sprinkler mains, ducts, insulation and any hanging services, then check the rafters and frames as well as the purlins.
- Combine the cases. Check dead load plus wind uplift, as the net force on a light roof can act upward. Take purlin capacities from the PEB maker’s section tables or from a cold-formed section calculation under the steel code the design basis names.
What is different about an insulated panel roof?
Do not assume the panel face carries point loads. Get the panel maker’s load and span data in writing, and confirm where the array fixings land.
FM Global, an insurer, makes the same point in its roof-mounted PV data sheet. For insulated metal panel roofs it asks for rigid PV panels to be connected through the panel directly into the top flange of the supporting purlins. It also asks for glass-backed panels on approved roofs with fibreglass or mineral wool insulation below (FM Global Data Sheet 1-15, April 2026). That is insurer guidance for FM clients, not an Indian rule. It still shows what an insurer checks first: how the roof assembly behaves in a fire under the array.
A panel maker’s own document shows what a maker-defined interface looks like. Kingspan’s PoweRail RW guide covers its UK and Ireland panels. It fixes only into the central crowns of one panel profile and allows only the supplied fixings. It also requires a qualified structural engineering company to assess the roof material and structure for the added load (Kingspan PoweRail RW Installation Guide). It is a UK product, and we did not open an Indian panel maker’s PV guidance. Ask your panel supplier for the equivalent.
Two more points. First, roof age matters. The same FM data sheet says a roof over 10 years old should be replaced or re-covered first. PV may last 25 to 30 years. Second, every cable through an insulated roof is a thermal bridge and a vapour path. Route cables outside the insulated envelope where the layout allows.
What about warehouse and logistics sheds?
Use the tin shed guide for sheet profiles, fastener pull-out and the five-gate checklist. Three warehouse points sit on top of it. Translucent sheets and skylights are fragile and need clearances. The structural reserve, not the roof area, sets the plant size on a large shed. And the edge and corner suction zones can take the outer rows out of the layout.
What do compressor starts do to the design?
They set the transformer check, the generator interaction and any battery power rating. Running current is the small number. Starting current is the one that dips the voltage.
A direct-on-line start draws a locked rotor current several times the running current. Danfoss’s soft starter guide sets a default locked rotor current of 600 percent of full load current. The range is 400 to 1,200 percent (Danfoss VLT Soft Starter MCD 600 Operating Guide, December 2020). We use 600 percent as a placeholder. Take the real value from the compressor data sheet.
Assumptions (illustrative). One 55 kW compressor motor, as in the NHB design, on 415 V. Power factor 0.88 and efficiency 0.93, both assumed. Full load current is then about 93 A.
| Starting method | Basis | Share of direct-on-line current | Illustrative current, A |
|---|---|---|---|
| Direct on line | 600 percent placeholder | 100% | 561 |
| Star-delta | Bitzer: up to about 66 percent of the delta start, depends on compressor | 66% | 370 |
| Part winding, 50/50 split | Bitzer: 65 percent | 65% | 365 |
| Part winding, 60/40 split | Bitzer: 75 percent | 75% | 421 |
| Soft starter, 450 percent limit | Danfoss typical setting, reciprocating, loaded | 75% | 421 |
| Soft starter, 400 percent limit | Danfoss typical setting, reciprocating, unloaded | 67% | 374 |
The Bitzer figures come from its pages on part winding start and star-delta start. Bitzer adds that star-delta start usually needs extra start unloading. For its screw compressors, complete unloading before the start is essential to avoid higher starting currents or a trip.
The lesson is plain. No method brings the start near the running current. The methods cut it by a quarter to a third, and an unloaded start helps a little more. At 561 A and 415 V, one direct start is about 400 kVA for a moment. That is the number to carry into the next four checks.
- Inverters. A grid-tied inverter holds its output near its rating. The grid or the generator supplies the start. Check the inverter data sheet for its maximum output current and its voltage ride-through settings.
- Transformer and voltage dip. Start kVA loads the transformer and the incoming line. Our transformer feasibility guide covers the DISCOM capacity side of the same transformer.
- Generator. Staged, unloaded starts keep the generator step within its data sheet. Our DG synchronisation guide covers the minimum load and controller side.
- Power factor. NHB asks for 0.95 or better, with an automatic power factor correction panel. See the power factor trap for what solar does to it.
When does a battery earn its place on a night load?
When the evening tariff pays for the storage and the starts can be served. Start with the job, then do the arithmetic.
- Name the job. Time-of-day shifting, demand management and backup are different designs. NHB’s type design already lists a standby generator, so a battery for backup has to carry compressor starts that a generator carries today. Shifting is a tariff question.
- Find the energy to shift. Take the load in the evening peak window from the tariff order and the interval data.
- Check the surplus. The holding-day surplus must cover the charge energy plus losses. In our example it is 376 kWh.
- Size the nameplate. Delivered energy divided by usable depth of discharge and by end-of-life capacity.
- Size the power. Take the operating load plus the staged start duty. Check the power conversion system data sheet for its short-term overload rating, because a continuous kVA rating is not a starting rating.
- Value the energy. If the surplus would be curtailed, each delivered kWh displaces a peak-window purchase. If the site can export, subtract the export credit you give up.
Assumptions (illustrative). The holding-period load is flat at 36.3 kW. Usable depth of discharge is 90 percent and end-of-life capacity is 80 percent of nameplate. Round trip efficiency is 90 percent. Replace it with the data sheet figure for the chosen product. Our round trip efficiency guide shows how the figure is calculated.
| State and season | Evening window | Load in window, kWh | Nameplate, kWh | Evening energy rate, Rs per unit | Gross value per day, Rs |
|---|---|---|---|---|---|
| Maharashtra, HT I(A), all year | 17:00 to 24:00, plus 20% | 254 | 353 | 10.13 | 2,572 |
| Uttar Pradesh, HV-2, Oct to Mar | 17:00 to 23:00, plus 15% | 218 | 302 | 8.17 | 1,777 |
| Uttar Pradesh, HV-2, Apr to Sep | 19:00 to 03:00, plus 15% | 290 | 403 | 8.17 | 2,370 |
| Tamil Nadu, HT I, all year | 18:00 to 22:00, plus 25% | 145 | 202 | 9.38 | 1,361 |
The rates are the state base energy charge times the time-of-day factor, taken from the orders in the next section. Maharashtra and Uttar Pradesh bill energy in kVAh and Tamil Nadu in kWh. We treat them as equal because the power factor is near unity. The gross value excludes demand charge, wheeling charge, duty and tax. It also ignores the cost of the battery, its degradation and the cost of money. Multiply by the days the store holds product, then compare the result with a real quote.
The table shows why a copied rule of thumb fails. A 15 percent peak premium in Uttar Pradesh leaves a thin margin. A 20 percent premium over a seven-hour window in Maharashtra pays more. A four-hour window in Tamil Nadu needs a battery roughly 40 percent smaller than Maharashtra’s. The decision follows the tariff order, not the load alone.
Two design cautions remain. We did not read any state rule on behind-the-meter storage charging for cold stores, so confirm it with the DISCOM. And NHB’s standard notes that ammonia is toxic and needs precautions. Where the battery and inverters sit relative to an ammonia machinery room is a decision for the plant’s safety consultant. We found no standard that sets the distance, so we give none. For sizing logic beyond this case, see our BESS sizing guide.
Which tariff category does a cold store fall under?
It depends on the state and sometimes on what the store holds. The category decides what each kWh is worth and whether time-of-day pricing applies.
Nationally, the Ministry of Power amended the consumer rights rules in 2023. Time-of-day tariffs became due for commercial and industrial consumers above 10 kW maximum demand by 1 April 2024. The peak tariff must be at least 1.20 times normal, and the solar-hour tariff at least 20 percent below normal. The tariff applies to the energy charge (PIB release of 2 August 2023 on the notification of 14 June 2023). States set their own slots and percentages, so read the order.
| State and orders | Category for cold storage and warehouses | Rates in the orders | Time-of-day pricing in the orders |
|---|---|---|---|
| Maharashtra: MERC order in Case 217 of 2024 (28 March 2025) and review order in Case 75 of 2025 (25 March 2026) | Cold storage for agricultural products as defined under the APMC Act 1963: HT V(B). Other cold storage and integrated logistics parks under the 2018 state policy: HT I(A). Warehouses and godowns: HT II | FY 2026-27, HT: V(B) Rs 145 per kVA per month and Rs 8.24 per kVAh. I(A) Rs 650 and Rs 8.44. HT II Rs 650 and Rs 13.72. Each adds Rs 0.81 wheeling | 09:00 to 17:00 rebate of 15% (Apr to Sep) or 25% (Oct to Mar). 17:00 to 24:00 plus 20%. The 2025 schedule prints a time-of-day table for HT I and none under HT V(B) |
| Uttar Pradesh: UPERC order on FY 2026-27 tariff (2 July 2026), Annexure I | HV-2 for industrial or processing use at 75 kW and above. The order names cold storage as an example of a seasonal industry | HV-2 up to 11 kV, urban: Rs 300 per kVA per month and Rs 7.10 per kVAh | Apr to Sep: 05:00 to 10:00 minus 15%, 19:00 to 03:00 plus 15%. Oct to Mar: 17:00 to 23:00 plus 15%, 23:00 to 05:00 minus 15%. No midday rebate printed |
| Tamil Nadu: TNERC Order No. 6 of 2025 (30 June 2025) | HT Tariff I. Cold storage units are named in its applicability clause | FY 2025-26: Rs 608 per kVA per month and 750 paise per kWh. FY 2026-27 carries an inflation adjustment from 1 July 2026 that we did not read | 06:00 to 10:00 and 18:00 to 22:00 plus 25%. 22:00 to 05:00 minus 5% |
The sources are four orders. The MERC order in Case 217 of 2024 gives the Maharashtra categories. The MERC order in Case 75 of 2025 gives the rates and slots. The others are the UPERC FY 2026-27 order and TNERC Order No. 6 of 2025. We read all four on 31 October 2026.
What a kWh used at midday saves follows from the same numbers. This counts the energy charge only.
| Category | Midday rate, Rs per unit | Basis |
|---|---|---|
| Maharashtra HT I(A) | 6.33 (Oct to Mar), 7.17 (Apr to Sep) | 8.44 less 25% or 15% |
| Maharashtra HT II (warehouses) | 10.29 (Oct to Mar), 11.66 (Apr to Sep) | 13.72 less 25% or 15% |
| Uttar Pradesh HV-2 | 7.10 | Base rate, no midday rebate |
| Tamil Nadu HT I | 7.50 | Base rate outside peak hours |
Three consequences follow.
- A plain warehouse in Maharashtra pays the commercial rate. Midday solar there saves about 10 to 12 rupees per unit. A non-agricultural cold store saves 6 to 7. The same roof earns more per kWh on the warehouse.
- Rebates lower the value of midday solar. In Maharashtra the rebate trims it by 15 to 25 percent. The evening premium then raises the case for storage.
- Seasonal rules matter in Uttar Pradesh. The order lets a seasonal industry declare an off-season maximum demand of up to 25 percent of contracted demand. Off-season fixed charges then follow recorded demand. Check how the plant’s off-season load fits.
The category text can change. We read the Maharashtra applicability in the 2025 order, and the 2026 review order did not restate it. In the 2025 order the load factor rebate applies to HT I, HT II and HT VIII only, and not to HT V(B). Ask the DISCOM in writing which category the connection is billed under. We did not open Telangana, Gujarat or other state orders, so we make no claim for them. Search each order’s applicability clauses for the words cold storage and godown. For the wider payback picture, see seven variables that industrial payback models miss.
Do cold-chain schemes fund the solar?
Possibly in part, and the rules sit with the scheme. Paragraph 7.48 of the MIDH guidelines lists solar panels among the components promoted for cold storage, next to generator sets, transformers and electrical panels. The component table of the guidelines also lists a solar power cold room with back-ended assistance. The assistance rates sit in those tables. Read the table for the component you plan to claim, and confirm eligibility with NHB before you design to it. We opened no MNRE scheme page for this topic, so we cite none.
How do you lay out the roof and keep fire access?
Start from the roof’s fixed objects, then place arrays around them. A cold store roof carries more of them than a dry warehouse.
FM Global’s data sheet gives concrete figures for its clients. Use noncombustible frames and mounting systems with glass-backed panels. Keep arrays to 46 m by 46 m (150 ft by 150 ft) at most, with a 1.2 m aisle to the next array. Keep 1.2 m from roof expansion joints and 1.8 m from skylights. The source is section 2.1.1.4 of the April 2026 data sheet. These are insurer rules. We did not open a national Indian standard that sets rooftop PV setbacks. Take the setback from the state fire service, the building’s fire approval and the insurer. Our fire setback sizing walkthrough shows how setbacks cut usable area, and the fire setback glossary entry defines the term, although both use US code dimensions.
Then mark the objects that take roof space on a cold store:
- Condensers, cooling towers and plant platforms, which shade modules and need maintenance access. Spray drift from wet condensers can wet and scale the array, so keep modules out of the drift path or plan the cleaning.
- Skylights, turbo ventilators, gutters and expansion joints.
- Walkways to every inverter, condenser and roof hatch.
- Cable routes that stay outside the insulated envelope.
- Earthing and lightning protection. MIDH lists earthing and lightning arrestors among cold storage components, so tie the array into the store’s system.
Show all of it on the single line diagram: the starters, the power factor panel, the generator changeover, the battery and the export control point.
What design deliverables does the EPC need?
Eight documents settle the project. Each has an input and a decision it unlocks for the next step.
| Deliverable | Inputs | What it settles |
|---|---|---|
| Roof data sheet | Roof type and age, purlin map, panel maker’s data | Structural go or no-go |
| Load study | 12 months of 15-minute data, compressor schedule and nameplates | Plant size and battery case |
| Wind and purlin note | Design basis, IS 875 (Part 3): 2015 factors | Fixings, setbacks and attachment layout |
| Hourly energy model | PVsyst output against the load | Self-consumption and surplus |
| Starting duty study | Motor nameplates, starter type, transformer data | Voltage dip, generator and battery power |
| Tariff memo | Category confirmed in writing, slots from the order | Battery value and export plan |
| Layout with fire access | State fire service, insurer, roof objects | Final kWp |
| SLD and protection | All of the above | Drawings for the DISCOM and the electrical inspector |
The first four need the least client data and shape the bid. Solar 3D pre-design fits that stage, since it produces the 3D layout, shading result and energy estimate before the load data arrives. If you want to see what finished drawing sets look like, you can request design samples.
FAQ
Can I put solar on the insulated panel roof of a cold store?
Only with the panel maker’s written load and span data. FM Global asks for fixings that pass through the panel into the purlin flanges. Check the roof age as well. FM Global advises replacing or re-covering a roof older than 10 years before adding PV.
Does more solar capacity raise self-consumption at a cold store?
Not in the holding season. In our illustrative example, half of a 170 kWp plant’s output finds no load in the hour it is made. Extra kWp mostly adds surplus. Size on the holding season and test a battery for the evening window.
Does solar cut a cold store’s demand charge?
Not reliably. Demand charges follow the recorded maximum demand, and a compressor start after sunset or in a cloudy hour can still set the peak. Model the demand against the hourly solar output, as our payback guide describes.
Which tariff category applies to a warehouse?
In Maharashtra, the order we read lists warehouses and godowns under HT II commercial. The Uttar Pradesh and Tamil Nadu texts we searched did not name warehouses, so ask the DISCOM in writing.
Can a battery replace the generator at a cold store?
Not on the evidence here. NHB’s type design lists a standby generator, and a battery has to carry staged compressor starts to take its place. Treat the battery as a tariff and demand tool first, and design backup separately.
Next step
A cold store bid needs a roof area, a shading result and a first energy estimate before the owner shares load data. Start with solar 3D pre-design for that stage. To discuss a specific cold storage or warehouse roof, message the team on WhatsApp or write through the contact page. Turnaround is agreed at scoping.