--- product_id: 733517947 title: "GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC)" brand: "genmax" price: "£1607.70" currency: GBP in_stock: true reviews_count: 5 category: "Genmax" url: https://www.desertcart.co.uk/products/733517947-genmax-portable-generator-4000w-ultra-quiet-145cc-engine-and-parallel store_origin: GB region: United Kingdom --- # 4000W peak power Digital LCD control Ultra-quiet operation GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) **Brand:** genmax **Price:** £1607.70 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your adventures—quietly and confidently! ## Quick Answers - **What is this?** GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) by genmax - **How much does it cost?** £1607.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/733517947-genmax-portable-generator-4000w-ultra-quiet-145cc-engine-and-parallel) ## Best For - genmax enthusiasts ## Why This Product - Trusted genmax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power When You Need It:** 4000 start watts / 3200 running watts deliver reliable, clean energy for sensitive electronics and tools. - • **Expandable Power Options:** Parallel & series compatible—double your output or power 240V devices with the optional connection box. - • **Smart Digital Monitoring:** LCD display shows runtime, voltage, and load so you stay in control and avoid surprises. - • **Whisper-Quiet Portability:** At just 55 lbs with a sturdy handle, take powerful backup power anywhere without the noise hassle. - • **Safety First with CO Detection:** Automatic shutdown if carbon monoxide levels rise, keeping your space safe and worry-free. ## Overview The GENMAX GM4000iSAPC is a compact, 4000W inverter generator powered by a 145cc 4-stroke engine, designed for ultra-quiet operation and clean power output with less than 3% THD. It features a digital LCD control center, parallel and series connection compatibility, and built-in carbon monoxide detection for enhanced safety. Weighing only 55 pounds with a 3.6-gallon tank, it’s perfect for backup home use and camping. ## Description Portable Power Station Review: I bought two of the 4000W/3200W generators for a trip with my camper, but I had to cancel that trip. So, they say in the box for about 9 months until a hurricane knocked out my power for 6 days. I unboxed one of the two generators I bought, read the instructions, filled it with oil and gas, pulled the cord and it started right up. First pull. And it started within three pulls every time over the next 5 days until the power was restored. I was able to run several fans, a refrigerator and an upright freezer as well as keeping electronics charged. I didn't have a single issue with that generator. It is a bit heavy and I wish it had a little bit larger fuel tank, but they don't impact my overall thoughts on the unit since it works so well. It is also not the quietest generator out there, but it's also far from the loudest. I think for its size, it's perfectly acceptable, especially when run in eco mode. If you don't have much of a load, it isn't very loud at all. I highly recommend this generator if you need one of this size. My next thing to test out is hooking up the two generators together to see how that works. Hopefully, by the time the next storm hits, I'll have a transfer switch hooked up to the house that I can plug into and will run both of them together with the parallel kit. Review: Unboxed, put oil and gas in it, fired up and sounded great. Followed break in procedure to the tee. The first time I really tried to use it, not only 3 weeks old, still brand new it just quit, no sensor alarm or anything, just flat shut off. Went to try to start it back up and it was really hard to pull. I checked for hydrolock, that’s not what it was. No strange sounds like motor was locking up or anything like that either. Something very strange happened, but now I have a nice bright orange boat anchor. My experience was absolutely terrible with this generator and I strongly suggest against it. ## Features - 【Powerful Power】GENMAX 4000iSAPC Start Watt Inverter Generator is powered by a 145cc 4-stroke OHV gas engine and uses inverter technology and magnetic dip stick to generate clean power of 4000 start watt/3200 running watts (less than 3% THD), allowing you to confidently connect to sensitive electronic devices such as TVs, lights, fans, small electric tools and more. For camping trips, etc. s etc - 【Quiet and Ultra Lightweight】Lightweight and compact at only 55 pounds. Sturdy handle makes it easy to carry even in long distances. The fully sealed design greatly reduces noise levels and is extremely quiet to use - 【Digital Control Center】The digital control center has an LCD display that displays working time, voltage output and load levels - Parallel & Series Connection Function: Combine two 120 V generators with a dedicated series parallel box and 240 V generator (series parallel box sold separately) - 【Co Detection】 When the insafe level of carbon monoxide is detected, the generator will automatically turn off ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | GENMAX | | Model Number | GM4000iSAPC | | Product Dimensions | 48.51 x 28.45 x 45.47 cm; 25.76 kg | | Color | orange | | Name List for Name Plates | GM4000iSAPC | | Material | Plastic | | Power Source | Gas Powered | | Voltage | 4000 | | Wattage | 4000 | | Laser Class | Maganetic Dip Stick, Portable, Ultra-Quiet | | Included Components | 1 | | Are Batteries Included | No | | Tank Volume | 3.6 Gallons | | Item Weight | 25.8 Kilograms | ## Product Details - **Brand:** GENMAX - **Fuel Type:** Gasoline - **Power Source:** Gas Powered - **Recommended Uses For Product:** Residential - **Wattage:** 4000 ## Images ![GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) - Image 1](https://m.media-amazon.com/images/I/71hh49ReVuL.jpg) ![GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) - Image 2](https://m.media-amazon.com/images/I/81Uj0UI-9aL.jpg) ![GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) - Image 3](https://m.media-amazon.com/images/I/71adguwECjL.jpg) ![GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) - Image 4](https://m.media-amazon.com/images/I/71S8CVlSzYL.jpg) ![GENMAX Portable Generator, 4000W Ultra Quiet 145cc Engine & Parallel and Series Compatible, EPA & CARB Compliant, Eco Mode Function, Backup Home Use & Camping Ultralight (GM4000iSAPC) - Image 5](https://m.media-amazon.com/images/I/714NBVkvLaL.jpg) ## Questions & Answers **Q: Does it have a 20A connection for an RV?** A: Yes it can be used for RV appliances. It's ha 2 20A plugs **Q: Can you buy extended warranty?** A: Yes **Q: How many hours on a full tank of gas?** A: 8 hours ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***R on July 26, 2024* I bought two of the 4000W/3200W generators for a trip with my camper, but I had to cancel that trip. So, they say in the box for about 9 months until a hurricane knocked out my power for 6 days. I unboxed one of the two generators I bought, read the instructions, filled it with oil and gas, pulled the cord and it started right up. First pull. And it started within three pulls every time over the next 5 days until the power was restored. I was able to run several fans, a refrigerator and an upright freezer as well as keeping electronics charged. I didn't have a single issue with that generator. It is a bit heavy and I wish it had a little bit larger fuel tank, but they don't impact my overall thoughts on the unit since it works so well. It is also not the quietest generator out there, but it's also far from the loudest. I think for its size, it's perfectly acceptable, especially when run in eco mode. If you don't have much of a load, it isn't very loud at all. I highly recommend this generator if you need one of this size. My next thing to test out is hooking up the two generators together to see how that works. Hopefully, by the time the next storm hits, I'll have a transfer switch hooked up to the house that I can plug into and will run both of them together with the parallel kit. ### ⭐ Review *by A***R on December 12, 2025* Unboxed, put oil and gas in it, fired up and sounded great. Followed break in procedure to the tee. The first time I really tried to use it, not only 3 weeks old, still brand new it just quit, no sensor alarm or anything, just flat shut off. Went to try to start it back up and it was really hard to pull. I checked for hydrolock, that’s not what it was. No strange sounds like motor was locking up or anything like that either. Something very strange happened, but now I have a nice bright orange boat anchor. My experience was absolutely terrible with this generator and I strongly suggest against it. ### ⭐⭐⭐⭐⭐ Review *by B***G on September 25, 2024* Very good purchase, quiet and powerful. Starts on 1st crank. Very Satisfied so for. ## Frequently Bought Together - GENMAX Generator，EPA Compliant, Eco-Mode Feature, Ultra Lightweight for Backup Home Use & Camping - WEN 55201 Magnetic Oil Dipstick for Inverter Generators (compatible with WEN, Yamaha, Predator) - Magicalmai Inductive Hour Meter for Gas Engine Generator Lawn Mower Pressure Washer Marine ATV Boat Outboard Motor Dirt Bike Motorcycle Waterproof Hr Meters - Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/733517947-genmax-portable-generator-4000w-ultra-quiet-145cc-engine-and-parallel](https://www.desertcart.co.uk/products/733517947-genmax-portable-generator-4000w-ultra-quiet-145cc-engine-and-parallel) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-23*