Office peak cut
Application: weekday demand peaks. Interface: existing switchboard and metering. RFQ unit: usable kWh for a stated hour band.
US business buyers · inquiry by form · EN
Building duty
A commercial building brief starts with the service the storage would connect to, the hours it must cover, and the space the enclosure can occupy. HelioHarbor Sourcing turns that situation into questions for factory quotations. The page does not design the electrical room and does not claim a building has already been supplied.
Write usable capacity in kWh against the load window you care about. Write rated power in kW against the demand peak or the backup slice you are studying. An illustrative office requirement can say 400 kWh usable and 200 kW, indoor cabinets, ambient up to 35°C, enclosure rating still to be confirmed by the quoted model. These inputs do not demonstrate two hours of backup after conversion losses, auxiliary loads, and reserve settings. If those two numbers are still ranges, send the ranges. A single slogan capacity is not enough for two suppliers to answer the same way.
Application: weekday demand peaks. Interface: existing switchboard and metering. RFQ unit: usable kWh for a stated hour band.
Application: a defined critical panel, not the whole store. Interface: transfer point and phase. RFQ unit: rated kW with duration.
Application: storage with an existing rooftop array. Interface: AC-coupled or DC-coupled path. RFQ unit: storage block separate from modules.
Application: several buildings on one service. Interface: which meter the storage follows. RFQ unit: one line per enclosure.
Application: shared garage or podium plant space. Interface: noise, ventilation, and enclosure rating. RFQ unit: indoor cabinet count.
A lower equipment number can reduce acquisition cost when freight, duties, cables, warranty, and documents truly match. The other reading is to price the delivered package: omitted accessories and a different document set can make the smaller unit figure the larger project cost. Ask both suppliers to fill the same scope lines before you rank them.
An AC-coupled arrangement can sit beside an existing rooftop system and keep its own conversion stage. A DC-coupled arrangement can remove a conversion step on a new build when the project interfaces match. Neither path is a default. State which one the building team is studying, then require the quotation to name the inverter role, the protocol, and any change in rated power.
Module-level solar electronics are a PV architecture question. If the rooftop already uses them, say so, because the storage interface may differ from a string or central layout. That note is a compatibility question, not a recommendation to rebuild the array.
Before award, have the qualified reviewer define an acceptance sheet for the exact proposed model: AC connection voltage and current in V and A, phase, operating temperature in °C, usable capacity in kWh, rated power in kW, and communication protocol. Request a supplier test plan that states the load profile, meter location, starting and ending state of charge, depth of discharge, thermal management settings and auxiliary loads. Record measured results and deviations against the agreed criteria; round-trip efficiency at battery terminals cannot be compared directly with an AC-system figure. A pilot or witnessed test requires separate supplier agreement, not a promise from this desk.
For architecture background, the US Department of Energy's Solar-Plus-Storage 101 (March 11, 2019) explains AC and DC coupling. Its historical cost examples are not current quotations or evidence for this project; the engineer must review the proposed interfaces.
Continue to industrial quote fields when the duty is a process feeder rather than a building peak. The sourcing brief compresses the open items. The ratings note and the contact form are the next stops.
Specification. Usable capacity, rated power, enclosure rating, thermal management.
Quantity. Systems and the unit of measure, with spares split out.
Delivered scope. Freight to the US destination and the accessory boundary.
Supplier documents. Datasheet and drawing for the quoted model, plus listing or transport files you choose to request.
Add the destination, the requested timing, and any budget with its currency and per-system, per-kWh, or whole-order basis. Supplier preference stays a buyer choice: high-end, mid-range, budget, or undecided.
Qualified business buyers
A confirmed benefit may be up to 3%.
Eligibility applies to qualified business buyers and is confirmed after we review your product, quantity, destination, and sourcing requirements.