Storage, EV charging and PV cleaning for off-grid sites.
Demand-charge savings and backup for commercial sites.
Automated cleaning that keeps solar output up.
Our product lines
Three manufacturing lines engineered in Suzhou - storage from 1 kWh to 2.4 MWh, DC charging from 30 to 480 kW, and cleaning robots at 1200-2000 m²/h - plus four partner inverter ranges from 3 to 135 kW.
Portable power stations (1-4 kWh), home batteries (5.12-241 kWh), C&I cabinets (112-261 kWh), mobile units and containerized ESS (1.2 and 2.4 MWh).
Mobile EV chargers (60-240 kW), a self-driving charging robot, a 1 MWh containerized station, ground-mounted storage chargers and a 30/60/90 kW portable DC unit.
Five photovoltaic cleaning robots: one that navigates by RTK and returns to its own charging station, four that one operator drives from up to 300 m away.
Growatt, Solis, VGRID and Yienergy hybrid and off-grid inverters, supplied and supported by SiRay.
Partner inverter brandsHow We Deploy
The same PV, battery and diesel architecture operates in three configurations. Choose a mode to see what drives it and where it is proven.
The microgrid runs disconnected from the utility. Solar serves the daytime load, the battery carries the evening peak, and the genset starts only on the residual deficit. Black start after a full outage is automatic.
The microgrid stays connected to the utility and handles voltage, frequency and peak demand instead of carrying the whole load. The battery shaves the billed demand peak and the genset or grid covers the balance, so the same hardware serves a much larger load.
Diesel is the guaranteed fallback rather than the primary supply. PV-priority dispatch means the genset only runs to cover what solar and storage cannot, which is where the measured 30-60% reduction in diesel consumption comes from.
Field Record
Eight site scenarios we design for. Every microgrid deployment shares one EMS and one dispatch philosophy, whatever the load looks like.
Off-grid
Grid extension is absent or uneconomic, so the microgrid is the only supply.
Island mode with automatic black start
Visual simulation — not a client installation.
Off-grid island power
Industrial
Continuous, high-reliability power for production processes that cannot stop.
Diesel hybrid cuts run hours 30-60%
Visual simulation — not a client installation.
Mining and construction power
Tourism
Quiet, clean power that improves guest experience and cuts the energy bill.
No diesel noise on the guest-facing side
Visual simulation — not a client installation.
Read the case study
Temporary
Portable, containerized power for a site that will be dismantled later.
Relocate the asset instead of rebuilding it
Visual simulation — not a client installation.
Mining and construction power
Transport
Backup and primary power for infrastructure where downtime is not an option.
Backup graded to the critical load list
Visual simulation — not a client installation.
All solutions
Weak grid
Stabilizing voltage and frequency where the public supply is unreliable.
Grid-parallel with automatic transfer
Visual simulation — not a client installation.
Microgrid solution
Public
Schools, clinics and community centres in areas the grid serves poorly.
Sized to a public budget, not a commercial one
Visual simulation — not a client installation.
All solutions
Defence
Secure, self-sufficient power for remote bases and forward operations.
No fuel logistics on the critical path
Visual simulation — not a client installation.
All solutionsWhy SiRay
The system is only as good as the engineering behind it and the service after commissioning.
Certified engineers design the complete PV + BESS + Diesel system, from the load list to the bill of materials.
PV-priority dispatch cuts diesel bills by 30-60% because the genset runs only to cover the gap solar and storage cannot.
Feasibility, sizing, containerized build, factory test, shipping, commissioning and operator training.
vEMS 2.0: 24/7 monitoring and predictive maintenance on every connected site.
| Site type | Typical load | SiRay recommendation |
|---|---|---|
| Camping, outage backup, mobile work | < 1 kW | GPP-1000 / GPP-2000 / GPP-4000 |
| Single home, day-time self-consumption | 3-6 kW | SNE-ES SW5.0 / GLR-100 / GHA-5000 |
| Home with night autonomy or no grid | 6-10 kW | GHA-10000 / GHA-16000 / GLR-314 |
| Shop, clinic, small factory | 30-100 kW | GCB-E100 (112 kWh / 50 kW) |
| Factory, campus, resort | 100-250 kW | GCB-E240 (241 kWh / 125 kW) / GLC-261 |
| Utility, island, mine | 1-3 MW | ESS-1M2-20FT / ESS-2M4-40FT |
Southeast Asia island resort: 580 kW of PV, over 1 MWh of containerized BESS, diesel kept as backup. Measured diesel consumption fell 50-70%, and the site has run 24/7 since commissioning.
Read the case study. Tropical Island Resort Microgrid
Product releases, technical notes and buying guidance.
The cleaning programme now covers two ways of working: one machine that runs and recharges itself, and four that one person drives. Five models, 1200 to 2000 m²/h, and every one of them rated IP65.
Read the articleA dirty module is a lossy module. The loss is gradual, it is invisible from the ground, and it is the reason cleaning belongs in the operating budget rather than in the maintenance schedule.
Read the articleThree numbers decide which of these five machines fits your plant: how steep the array is, how heavy the machine is once loaded, and how many roller brushes it carries. Start there, not with the headline cleaning rate.
Read the articleA SiRay GPP-1000 holds 1004.8 Wh of LiFePO4 capacity. Running a 100 W camping fridge, the GPP-1000 supplies it for about 8 hours on battery alone. With 300 W of solar input connected, the fridge runs through daylight while the pack recharges.
SiRay residential battery modules are rated for more than 6000 cycles at 0.5C, 90% depth of discharge and 25 ℃, with a 15-year design life. The SNE-ES F30 and SNE-ES F32 use an 8000-cycle cell. The GLC-261 liquid-cooled cabinet is rated 8000 cycles to 70% end of life.
Peak shaving uses a battery to discharge during the site's highest-demand window and recharge when the tariff is low, which caps the monthly kW peak that drives the demand charge. A SiRay GCB-E100 (112.53 kWh at 50 kW) or GCB-E240 (241.15 kWh at 125 kW) performs this automatically through its integrated three-phase hybrid PCS. The saved amount depends on the load profile and tariff, so SiRay sizes from twelve months of interval load data.
A mobile EV charger is a battery pack, a DC charger and a wheeled chassis in one unit, so it can charge a vehicle at full DC power without a grid connection at the charging point. SiRay mobile chargers carry 75 to 416 kWh of LiFePO4 and deliver 60 to 240 kW DC at 200-1000 V through GB/T, CCS1, CCS2 or CHAdeMO connectors.
A solar-storage-diesel microgrid is a small-scale generation and distribution system that combines photovoltaic arrays, battery energy storage and diesel generators under one Energy Management System. It runs independently in island mode or in parallel with the utility grid, switches between sources automatically and can black-start the site after a full blackout.
