The lighting company's factory in Algeciras consumes approximately 400 kWh per day. Local policy and corporate sustainability targets demanded a rapid move away from fossil-fuel-heavy supply. Traditional solutions were costly, slow to build, and hard to expand. We proposed a single 20-foot mobile solar container as an on-grid solar container solution sized to produce roughly 400 kWh per day, matching the factory's daytime demand profile. The customer selected SolaraBox because our design and product performance aligned perfectly with their operational and environmental goals.
Spain has been actively improving the regulatory and financial environment for self-consumption and distributed generation. Key reforms — including Royal Decree 244/2019, and subsequent measures that simplify self-consumption, promote collective self-consumption, and remove unnecessary administrative barriers — have made grid-connected solar much easier to deploy. Spain has also announced funding and incentive programs for renewables and storage to boost local manufacturing and deployment of distributed clean energy, which further supports on-grid projects like ours. These regulatory and funding moves materially reduced permitting friction and improved the business case for our on-grid solar container.
To show the customer the numbers, we used straightforward unit costs the customer provided: a grid electricity price of 0.281 USD/kWh, and a delivered solar generation cost of 0.05 USD/kWh for the container-produced energy. At 400 kWh/day: grid-supplied electricity costs 400 × 0.281 = 112.40 USD per day. The on-grid solar container supplies the same energy at 400 × 0.05 = 20.00 USD per day. That's a daily saving of 92.40 USD, or about an 82% reduction in daytime energy cost. Over a year (365 days) the saving is roughly 33,726 USD. Those clear figures helped the customer justify the purchase and estimate payback.
We produced one 20ft mobile solar container configured for on-grid operation and factory-tested it before shipment. Manufacturing lead time was 40 days; transport to the customer site took 35 days. Once on site, the customer completed full deployment in six hours. The rapid on-site time was possible because the container is designed to be plug-and-play: it requires only a level compacted pad — no civil works or concrete foundations — and all control systems were pre-commissioned at our factory. The result: a true on-grid solar container that went from truck to production in a single morning.
Type of container | 20 Feet High Cube Open Side |
External Dimensions (L*w*H/mm) | 6058*2438*2896(L'W'H/mm) |
Total weight (Tons) | 10.5 |
Installation Person | 6 |
Compatibility(option 1) Orientation | AC output with inverter Any ozimuth by container |
Solar Panel Type | N Type i-Topcon |
Solar Panel Power(Pmaxwp) | 590W per module Tier 1 |
String capacity(Pmax/kwp) | 99.12 KWP |
Output Power Volt.¤t(V/Hz) | 220/380,230/400,3L/N/PE or 3L/PE |
Inverter Brand | SINENG |
Certification | TUV tested,CE-certified |
In Algeciras (southern Spain, strong sun exposure), we positioned the container on a north–south axis so the solar arrays face true south, maximizing midday irradiance and matching the factory's highest load hours. This south-facing arrangement produces the most consistent daytime output and reduces the risk of early-evening shortfalls — important for a factory that runs heavy daytime processes. Setting the container on a level pad and aligning the arrays correctly also simplified wiring to the factory's existing distribution board, minimizing connection losses and ensuring stable grid injection.
On day one the on-grid solar container produced close to the expected 400 kWh and immediately displaced grid imports. The lighting company reported visible reductions in their meter readings and a clear drop in daily energy cost from the first full day of operation.
Because the factory wanted flexibility, the on-grid solar container approach lets them scale later: add extra mobile units, pair battery storage, or integrate with their energy management system for demand shaving and peak reduction. Spain's evolving incentive programs and storage support make this path even more attractive for future phases. If the factory ever needs more daytime generation or wants to add storage to reduce peak charges, our modular on-grid solar container units make that upgrade straightforward and fast.
We thank our customer for trusting SolaraBox. Delivering this on-grid solar container solution in record time — manufactured in 40 days, shipped in 35 days. We remain customer-first: we design to solve real problems, reduce operating costs, and support decarbonization goals. We believe more industrial facilities will turn to on-grid solar container solutions like this one to cut costs and emissions while keeping deployment risk low.
If this case inspires you and you want to explore how an on-grid solar container could reduce your energy bill and meet your project needs, click here to send your project details (daily kWh, site, constraints). We will review the request and respond with a practical proposal tailored to your situation.
— SolaraBox, delivering practical on-grid solar container solutions that work from day one.
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