The Renogy P2 is rated for 3,000W continuous output, with plug-in outlets, a hardwire terminal block and a wired remote. The rating describes what the inverter is designed to supply under its operating conditions. It does not establish that your battery bank can supply the required DC power.
Who it is for
A candidate if your actual simultaneous loads justify this output class and the battery, cabling, protection and installation can support it across the intended operating range. For air conditioning, start with the load and runtime calculation.
Consider a smaller inverter if your load or usable bank current is lower. A large inverter can run a small load, but its label does not create extra battery power. A single high-current battery may supply more than two smaller ones; count is not the deciding specification.
The specification
| Model | RNG-INVT-3000-12V-P2 (current P2 series) |
| Continuous / surge | 3,000W / 6,000W for 1 second |
| Waveform | Pure sine, THD under 3% |
| Output | 115V AC, 60Hz (manual; the product page says 120V) |
| Idle draw | Under 30W |
| Efficiency | Above 90% peak, above 85% at full load |
| Input window | Manual: 10–16V; alarm 11V, shutdown 10.5V ±0.3V; page says 10.0V shutdown |
| Outlets | 3 × AC, hardwire terminal block, USB, GFCI |
| Fuse / cable | 400A / 4/0 AWG recommended — not included |
| Size / weight | 18.9 × 9 × 4 in, 12.5 lb |
| Listings | UL 458 and CSA C22.2 No. 107.1, ETL |
| Warranty | 1 year, flat (not prorated) |
Source: Renogy’s linked P2 manual, marked February 2023, Revision A2, and the current product page. The current page gives 120V output and 10.0V low-voltage shutdown; the manual gives 115V and 10.5V. Confirm the supplied revision. Its input-current table also lists 250A for the 3000W model, which does not include the losses implied by delivering 3,000W from exactly 12V; do not use that number alone to size the bank.
Design and build
The manual lists three AC outlets, a terminal block, GFCI protection and a wired remote with a 5m RJ11 cable. Individual outlet and circuit limits still apply; a 3,000W total rating is not a rating for every socket.
A hardwired installation needs correct source isolation and protection. Follow the exact manual and use a qualified installer; do not feed an RV panel that can also receive shore or generator power without the required arrangement.
The remote helps switch the inverter off when it is not needed. The manual’s under-30W no-load figure is not an assurance of zero standby consumption.
The specification that decides the purchase
The current estimate is AC load ÷ inverter efficiency ÷ DC terminal voltage. Using the site’s 85% planning efficiency makes the loss explicit. At a fixed AC load, falling input voltage means rising input current.
Fixed examples at 85% conversion efficiency. Each pair shows the power implied by a bank’s continuous current limit at 12V and 11V at the inverter terminals. Battery capacity in Ah does not establish this current limit.
Available power estimate = terminal voltage × allowed continuous current × efficiency
100A continuous bank limit
Upper · 12V: 1,020W
Lower · 11V: 935W
200A continuous bank limit
Upper · 12V: 2,040W
Lower · 11V: 1,870W
300A continuous bank limit
Upper · 12V: 3,060W
Lower · 11V: 2,805W
At 3,000W output: this model needs about 294A at 12V, rising to 321A at 11V. A nominal 300A bank has little margin at 12V and falls short at 11V under these assumptions.
The inverter still caps output at its own rating. Other DC loads, cable losses, temperature, battery limits and startup surges need separate allowance. Parallel batteries must be approved for that arrangement and share current properly; three 100Ah labels alone prove nothing about discharge current.
Planning efficiency matches the battery calculator and uses the 85% full-load figure in Renogy’s P2 manual. This is a power comparison, not a wiring plan, measured performance curve or minimum operating-voltage recommendation.
Use the allowed continuous current of the actual bank, then account for other DC loads and startup demand. Do not equate a 100Ah label with a 100A BMS or assume parallel batteries share perfectly. A bank with 300A of nominal continuous rating leaves little margin in the 12V example and cannot support the 11V example under these assumptions.
This does not mean a smaller bank cannot power a lighter load through this inverter. It means the full 3,000W label is conditional on the whole system. See inverter sizing and the battery calculator for the wider checks.
What is not in the box
Renogy’s current page recommends 4/0 AWG, and the linked manual lists a 400A battery fuse for the 3000W model. The package includes the remote and its cable, but not the DC battery cable pair. The 2000W package lists a 1/0 AWG pair in the shared manual.
These published figures are not a complete wiring design. Cable length, insulation and installation method, protection coordination, connections and the battery manufacturer’s requirements still need checking. A larger fuse does not raise a battery’s continuous rating.
Warranty and documentation limits
The current product page lists a one-year materials/workmanship term. Compare the applicable warranty and support route alongside the complete installation price. Neither an anecdotal failure report nor warranty length predicts the life of your unit.
The linked manual’s revision date is February 2023; a later upload or resource page date is not a new hardware release date. Its output-voltage and shutdown figures differ from the live product page. Obtain exact-revision confirmation where that difference affects the installation or a connected appliance.
Alternatives
- Renogy 2000W P2 — the same platform with lower output and a cable pair listed in the manual. Check actual loads and bank current rather than assuming two batteries are enough.
- GIANDEL PS-2200KAR — less power, three times the warranty, and a published spec table of its own. The budget route for buyers who weight cover over watts.
- Victron MultiPlus 12/3000 — the other direction entirely: 2,400W continuous but with a 120A charger, transfer switch and five-year dealer warranty. The full brand comparison is its own page.
- Go Power ISW3000 — the same watts through an RV dealer network, for buyers who want the service relationship more than the direct price.
The unit reviewed here
Renogy 3000W P2
P2 series, true 3,000W, GFCI, outlets plus hardwire, wired remote included. Cables are not.
A lower output option
Renogy 2000W P2
A lower output option when the actual load and bank current limits suit it. Battery count alone does not establish compatibility.
The longer-warranty budget route
GIANDEL 2200W
2,200W pure sine behind a 3-year warranty, three times the cover for less money.
Related guides
- Best RV inverters — where this unit placed against six rivals, and why.
- Victron vs Renogy — the brand decision this model usually headlines.
- What size inverter do I need? — confirm 3,000W is even your number before buying anything.
- Inverter vs inverter/charger — if your converter is also due for replacement, read this first.
- Best RV lithium batteries — compare continuous current and energy capacity separately.
- The electrical section collects everything published so far.
For how products on this site are selected and what we do not claim about them, see the editorial policy.
Questions worth answering
Is the Renogy 3000W inverter worth it?
It is a candidate when the actual loads justify 3,000W and the battery and installation can supply the necessary current across the intended voltage range. Compare the full installed cost and one-year warranty. A 300A BMS label alone does not guarantee full output at low voltage.
What batteries do I need to run it?
Size by allowed continuous current, voltage under load, runtime and startup demand. At 85% assumed efficiency, 3,000W requires about 294A at 12V or 321A at 11V at the inverter. Three batteries with 100A limits are not a blanket guarantee: parallel permission, sharing, wiring and other DC loads also matter. Ah alone does not establish BMS current.
Does it come with battery cables?
No. The 3000W ships with a wired remote and an RJ11 cable but no battery cables; Renogy's product page recommends 4/0 AWG, and it calls for a 400A fuse. Both are a real second purchase. The 2000W version of the same series includes a 1/0 AWG pair.
Why does the manual say 115V output when the page says 120V?
Renogy's own documents disagree — the manual's specification table states 115V AC while the current product page says 120V AC. Confirm the supplied revision and the connected appliance’s requirements; the specification table here retains the manual’s figure.
Is the warranty prorated like Renogy's battery warranty?
No. Renogy's warranty document prorates batteries and power stations; the P2 inverters carry a flat 1-year material and workmanship term. Check the applicable terms, seller and supplied revision before purchase; the published term does not establish a failure rate or likely claim outcome.
What is the difference between the P2 and the older Renogy 3000W?
This review covers RNG-INVT-3000-12V-P2. The linked shared manual is marked February 2023, Revision A2; its upload date is not a hardware release date. Match the exact model and revision when comparing older reviews or installation instructions. Age alone does not identify a report as P2 or pre-P2.