Is My 9kW Solar Setup a Good Plan? Seeking Advice!

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Asked By SolarWizard29 On

Hey everyone! I'm looking for some feedback on a solar setup I'm considering. I'm not exactly a DIY pro, so I'm thinking of going with a Bluetti system paired with a local electrician to connect it to my house. Here's the plan:

- **Bluetti EP800 + 3 B500 Batteries**: $7,499 (7,600W continuous, 9,000W surge)
- **18 x 500W Solar Panels**: $1,575
- **Wiring & Accessories**: $258.48
- **Mounting Hardware (5 Sets)**: $1,495

**Total Estimate**: $10,827.48 (not including electrician fees)

I want to know if this is too expensive for a 9kWh system or if there are better options.
I've also thought about a more DIY route:

**Option 1: Growatt Off-Grid Inverter + Server Rack Batteries**
- **Growatt 12kW Inverter**: ~$2,500
- **2-3 x 48V 100Ah LiFePO4 Batteries**: ~$3,000-$4,500
- **18 x 500W Solar Panels**: ~$1,600
- **Wiring + Mounting**: ~$800-$1,200

Total Cost: ~$8,500-$10,000

**Option 2: EG4 Inverter + EG4 Batteries**
- **EG4 6000XP Hybrid Inverter**: ~$1,500
- **2 x EG4 48V 100Ah Batteries**: ~$3,600
- **Panels + Wiring**: ~$2,500

Total Cost: ~$7,500-$8,500

I'm primarily focused on sustainability and just starting to explore how to maintain power during outages. I'd mainly like to run my fridge, a few lights, a couple of laptops, a Wi-Fi router, and Starlink hardware. Any thoughts or suggestions would be really appreciated!

5 Answers

Answered By GreenThumb_88 On

Have you looked into the Deye inverter? They can be very efficient, but if you’re in the US, the best route is through Solark, and just be aware of any extra costs associated with that. Just thought it could be a solid addition to your plans!

SolarWizard29 -

Thanks for the tip! I’ll check that out for sure.

Answered By EcoTechie_57 On

I think going for 48V systems is a smart choice! They give you more flexibility since you won't be tied down to a specific ecosystem, which allows for easier upgrades or battery swaps. If your peak output suits the 6000XP, it's a solid option, and it's cheaper for future capacity additions. I also suggest checking out the EG4 12kPV at $3,500 for 8KW continuous output. Overall, it sounds like a better long-term plan!

Answered By BrightFuture_42 On

Make sure you factor in mounting costs since they can add up and impact your overall budget. It seems like a significant part of your total already!

Answered By HomeEnergyNerd On

Quick question, does the EP800 allow you to set everything up at 240V without needing to buy another unit? Just curious about that capability!

Answered By OffGridGiraffe On

Just a heads up: if you ever think about going grid-tied, a Growatt off-grid like the SPH 10000TL-HU-US could be a versatile option to consider. It gives you more options down the line!

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