When is it cheaper to rent a Generac Portable Inverter Generator by the week than by the day?

From day 5. 5 days at the $29.75 day rate would be $148.75, but the weekly rate caps it at $119.

When is it cheaper to rent a Generac Portable Inverter Generator on the 28-day rate?

From day 18. At that point the week-and-day composition reaches the $357 28-day rate, and the price stops climbing for the rest of the cycle.

Break-even duration

Equipment rents on three rates — a day rate, a week rate and a 28-day rate — and the cheapest one changes as the job runs long. This finds the two days where it changes, on a real listing’s real published rates.

Generac Portable Inverter Generator

See the listing →

Reginald Poliah · Generators - Gas

Day: $29.75
Week: $119
28 days: $357

Daily stops winning on

day 5

5 days at the day rate would be $148.75. On the week rate it is $119.

Weekly stops winning on

day 18

18 days at the day rate would be $535.50. On the 28-day rate it is $357.

The working

Whole weeks bill at the week rate; the leftover days bill at the day rate but never add up to more than one extra week; and a whole 28-day cycle never costs more than the 28-day rate. That is the rule, applied one day at a time.

Rental price by duration for Generac Portable Inverter Generator, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$29.75	$29.75	—	day
2	$59.50	$59.50	—	day
3	$89.25	$89.25	—	day
4	$119	$119	—	day
5	$148.75	$119	you save $29.75	week
6	$178.50	$119	you save $59.50	week
7	$208.25	$119	you save $89.25	week
8	$238	$148.75	you save $89.25	week
9	$267.75	$178.50	you save $89.25	week
10	$297.50	$208.25	you save $89.25	week
11	$327.25	$238	you save $89.25	week
12	$357	$238	you save $119	week
13	$386.75	$238	you save $148.75	week
14	$416.50	$238	you save $178.50	week
15	$446.25	$267.75	you save $178.50	week
16	$476	$297.50	you save $178.50	week
17	$505.75	$327.25	you save $178.50	week
18	$535.50	$357	you save $178.50	28-day
19	$565.25	$357	you save $208.25	28-day
20	$595	$357	you save $238	28-day
21	$624.75	$357	you save $267.75	28-day
22	$654.50	$357	you save $297.50	28-day
23	$684.25	$357	you save $327.25	28-day
24	$714	$357	you save $357	28-day
25	$743.75	$357	you save $386.75	28-day
26	$773.50	$357	you save $416.50	28-day
27	$803.25	$357	you save $446.25	28-day
28	$833	$357	you save $476	28-day
29	$862.75	$386.75	you save $476	day
30	$892.50	$416.50	you save $476	day
31	$922.25	$446.25	you save $476	day
32	$952	$476	you save $476	day
33	$981.75	$476	you save $505.75	week
34	$1,011.50	$476	you save $535.50	week
35	$1,041.25	$476	you save $565.25	week

Rental rates only. Protection and the marketplace service fee are added on top — see the checkout figure below.

What checkout will quote you

Rental · 18 days: $357
Rental protection (RPP): $53.55
Service fee: $35.70
Estimated total: $446.25

Pick a listing

The numbers come from one operator’s published rates, so the tool needs to know whose.

Where these numbers come from

The rates are the operator’s own, read live from their listing. The arithmetic is the same best-price billing engine that produces 2Quip invoices — not a second copy written for this page — run on the industry-standard terms: a 28-day cycle, whole weeks at the week rate, leftover days at the day rate capped at one more week.

An operator can agree different terms on an individual rental, and a long rental bills per 28-day cycle rather than in one lump. So treat this as what the rate card says, and the operator’s quote as what you are agreeing to.