Welding generator size check

Each load enters apparent power directly, or active power with a power factor over 0 and at most 1, in which case kVA = kW ÷ PF. An optional starting multiplier of at least 1 may be entered per load; it is treated as entered data, never inferred.

• running kVA = Σ load kVA
• start peak = starting load kVA × multiplier + Σ other running kVA — modelled one sequential start at a time, for every load with a multiplier
• peak kVA = max(running total, every start peak)
• planned kVA = peak × (1 + margin ÷ 100)

Worked figures: 1.6 kW ÷ 0.9 = 1.7778 kVA and 0.8 kW ÷ 0.8 = 1 kVA give a running total of 2.7778 kVA; starting the welding set at 2.5× while the grinder runs gives 1.7778 × 2.5 + 1 = 5.4444 kVA; a 20% margin lands the planned figure at 6.5333 kVA.

Up to eight load rows are modelled. The add and remove row controls need JavaScript; without it, the single rendered row still documents every field the record reads.

• STOP — a combustion generator indoors, in an enclosed or restricted space, or in a trench ends the estimate; re-plan the siting in open air per the manufacturer’s instructions, or have a competent person assess the installation before any generator runs.
• HOLD — an empty load list, missing or non-finite values, unresolved siting, or a rating basis other than nameplate/manufacturer data keeps the record unissued.
• Start behaviour is modelled only from the multipliers you entered, one start at a time — verify starting demand against the manufacturer’s data before selecting anything.
• Welding sets can present a very different demand while striking an arc than at idle; the nameplate and manufacturer documentation govern.
• The estimate maps to no product and carries no commercial link in this release.