Enough theory. Let’s run the numbers on two real system designs — same house, same goals, different equipment. You’ll see exactly where the money goes and what each path actually delivers.
This is how you stop guessing and start building.
Same property. Same power needs. Same solar resource. The only thing that changes is the equipment choice — and that choice determines everything.
Two paths. Two price tags. Two very different results. Let’s see where the string math takes us.
This is the simpler route. Grab a consumer all-in-one, plug in a few panels, stack some brand-matched batteries. It works — but the MPPT constraints will surprise you.
Inverter: Consumer all-in-one, 3,000W continuous / 6,000W surge. MPPT specs: 2,400W max PV input, VOC 12-150VDC, 12A max input current. 120V output. Built-in transfer switch.
Panels: You want 6 x 400W = 2,400W nameplate, matching the MPPT max. Sounds perfect on paper.
Each panel: Voc 37.5V, Imp 12.8A.
| Item | Cost |
|---|---|
| Inverter + 2 battery packs | $2,500-$3,500 |
| 4 panels | $400-$600 |
| Mounting, wire, BOS | $500-$800 |
| Total | $3,500-$5,000 |
This is the patriot’s path. More capability, more expandability, and the MPPT window actually works with you instead of against you. Takes more planning and more wiring — but the numbers tell the story.
Inverter: SRNE-based all-in-one, 5,000W continuous / 10,000W surge. MPPT specs: 5,500W max PV input, 120-500VDC range, 100A max input current. 120/240V split-phase. CAN bus battery communication. Generator input.
Panels: 8 x 400W = 3,200W nameplate. Well within the 5,500W MPPT max, with room to grow.
Each panel: Voc 37.5V, Vmp 31.2V, Isc 13.9A. MPPT window: 120-500V.
Single string of 8 panels:
One string. One wire run. No parallel headaches. The wider MPPT window handles temperature swings without breaking a sweat.
Two 5 kWh server rack batteries in parallel = 10 kWh total. At 85% usable depth of discharge, that’s 8.5 kWh of real, usable energy. Enough for overnight essentials with room to spare. The rack holds two more units when you’re ready to expand.
PV wire from roof to inverter (~15 feet — voltage drop is negligible at these voltages). DC combiner with fuses. DC disconnect. 10-circuit manual transfer switch. AC disconnect. Grounding to rod. Everything labeled.
| Item | Cost |
|---|---|
| Inverter | $800-$1,200 |
| 8 panels | $600-$1,000 |
| 2 x 5 kWh batteries | $1,500-$2,000 |
| Transfer switch | $300-$400 |
| Wire, conduit, fuses, disconnects, mounting | $800-$1,200 |
| Total | $4,000-$6,000 |
| What you get | Consumer Path | Prosumer Path |
|---|---|---|
| Solar input | 1,200-1,600W | 3,200W |
| Battery storage | 4 kWh | 10 kWh (8.5 usable) |
| Expansion room | Very limited | Significant |
| MPPT headroom | Constrained | Wide open |
| Setup complexity | Easy | Moderate |
| Total cost | $3,500-$5,000 | $4,000-$6,000 |
The consumer path gets you generating power fast, with less effort. The prosumer path takes more work upfront but puts a lot more capability per dollar on your roof and in your garage.
Neither is wrong. But the numbers don’t lie — for a small premium, the prosumer path delivers substantially more energy independence, and that’s the whole point.
When your design is done, you should be able to write this:
That’s your design. That’s your shopping list. That’s the document that turns research into action.
DATA SOURCED FROM: Component specifications from manufacturer datasheets (Voc, Vmp, Isc ratings). Cost estimates based on 2025-2026 retail pricing for consumer and prosumer standalone solar equipment. String calculations follow NEC temperature correction methodology.