6 kW Solar System with 10 kWh Battery
Built around a small shop: two split air conditioners and a display fridge by day, lights and refrigeration through the evening on a 10.24 kWh LFP bank.
- PV array
- 6.05 kWp
- 11 x 550 W
- Battery
- 10.24 kWh
- 9.22 kWh usable
- Inverter
- 6 kW
- 6 kW / 48 V hybrid inverter
- Daily output (South Africa)
- 25 kWh
- South Africa, 5.5 kWh/m2/day
This is the configuration from a quotation we issued in May 2026: a trading shop with two 1.2 kW split units, a 300 W display fridge, LED lighting and a card machine. It is the point where a solar kit stops being emergency lighting and starts replacing grid consumption — 6.05 kWp is enough to carry the air conditioners through the trading day, and 10.24 kWh is enough to keep the fridge and lights on after closing.
The design decision that matters here is the split array. Eleven 550 W modules cannot be wired as one string on a 48 V hybrid: the open-circuit voltage would sit too close to the 500 V ceiling in cold weather, and the string would fall below start voltage on a cloudy morning. We split them 6 + 5 across two MPPT trackers, which also means partial shading on the shop roof only costs you the affected string, not the whole array.
What's in the kit
The bill of materials below is what ships, not a wish list. Anything marked configurable is fixed at order confirmation against your grid, your generator and your load list.
| Item | Specification | Qty |
|---|---|---|
| PV modules | 550 W monocrystalline half-cell, 182 mm, 25-year performance warranty. Smaller DLXN-M10 50-230 W modules are available for outbuildings or a separate off-grid circuit. module range · DLXN-M10-230W | 11 x 550 W |
| Hybrid inverter Configurable | 6 kW / 48 V hybrid inverter, 2 x MPPT, 120 A charger. Configurable: 6 kW/48 V hybrid with grid + generator input (standard for shop installations), or a 6 kW grid-tie unit if the shop already has a diesel backup and only wants to cut the daytime bill. Three-phase variants are available for 380-400 V premises. | 1 |
| Battery | DLXN-F5200 — 10.24 kWh LiFePO4, 51.2 V / 200 Ah, 6,000-8,000 cycles, built-in BMS. Two DLXN-F5100 5.12 kWh packs may be paralleled instead of the F5200 when you want to split the bank across two walls or two rooms for fire-separation reasons. DLXN-F5100 | 1 |
| Mounting | Mounting: 11 x rail sets with mid/end clamps, either pitched-roof hooks or a flat-roof ballasted frame at 10-15 degrees. Flat-roof ballast is the usual choice for shop roofs because it avoids drilling the waterproofing. | 1 |
| DC side / AC side | Balance of system: 2 x DC combiner with 32 A breakers and Type 2 SPD, 6 mm² PV cable (larger than the 3.2 kW kit because the strings are longer), 12-way AC board with RCD and surge arrestor, energy meter with CT clamps so the inverter can limit export, plus 4G monitoring. | 1 |
| Monitoring | WiFi + 4G dongle, Modbus TCP for third-party EMS, 5-year data retention on the DLXN-IOT platform. | 1 |
How it connects
One array, one inverter, one battery bank, and three possible AC sources. The drawing below is the flow an installer works from; the numbered steps are the order the work actually happens in on site.
Arrows show power flow. The inverter decides every few milliseconds whether the array feeds the loads, charges the battery, exports, or blends all three.
- 1
Mount and earth the array
Rails first, then modules, then a continuous earth bond across every frame. 11 modules at 550 W is 6,050 Wp of DC; the frames must be bonded to the same earth bar as the inverter or the surge protection has nothing to divert into.
- 2
Wire the strings to the combiner
11 x 550 W monocrystalline half-cell, 6S1P + 5S1P on separate MPPT inputs. Each string lands on its own fused or breaker-protected input in the DC combiner, with a Type 2 surge arrester on the DC bus. Check polarity with a meter before the first MC4 click — reversed strings are the most common cause of a dead MPPT on commissioning day.
- 3
Run DC to the inverter MPPT inputs
Two independent trackers: 6 modules (Voc about 300 V) on MPPT 1, 5 modules (Voc about 250 V) on MPPT 2. Splitting 11 modules this way is deliberate — a 6+5 split keeps both strings above the inverter start voltage in low light, which a single 11-module string cannot do on a 48 V machine with a 500 V ceiling. Keep the DC run as short as the building allows; every extra 10 m of 6 mm2 cable costs roughly 0.3% of yield.
- 4
Set the battery on its own breaker
The DLXN-F5200 (10.24 kWh, 51.2 V / 200 Ah) connects to the inverter DC bus through its own DC breaker and a pre-charge resistor. Neutral, earth and the battery negative are kept separate; the BMS CAN lead is landed on the inverter comms port and the protocol selected in the menu before the first charge.
- 5
Build the AC side
Inverter AC out feeds a distribution board with an RCD, one breaker per circuit, and a surge arrestor. Grid and generator each get their own input with a changeover, so the inverter can be told which source is present rather than guessing.
- 6
Configure, then load test
Set battery type to lithium, capacity to 10.24 kWh, charge current to the value in the commissioning sheet, and export limit to the site rule (zero-export for prepaid meters). Then apply a known load — a 2 kW kettle is the usual choice — and confirm the inverter holds frequency and voltage while the array is curtailed.
- 7
Hand over the labels and the diagram
Every breaker gets a label, the single-line diagram goes inside the DB door, and the monitoring account is transferred to the owner. This is what an inspector asks for, and it is what the next technician needs two years later.
How much it generates
Daily yield is calculated as 6.05 kWp x irradiance x 0.75 system efficiency. The efficiency factor is not a marketing number: it bundles inverter conversion, DC and AC cable losses, soiling, mismatch and temperature derating at roughly 35 degrees cell temperature.
| Market | Irradiance (kWh/m2/day) | Daily (kWh) | Monthly (kWh) | Yearly (kWh) | What that covers |
|---|---|---|---|---|---|
| South Africa | 5.5 | 25 | 750 | 9,125 | about 2.1 kWh/day of self-consumption, or roughly 38% of a 20 kWh/day household |
| Nigeria | 5 | 22.7 | 681 | 8,286 | about 1.9 kWh/day of self-consumption, or roughly 34% of a 20 kWh/day household |
| Philippines | 4.5 | 20.4 | 612 | 7,446 | about 1.7 kWh/day of self-consumption, or roughly 31% of a 20 kWh/day household |
Estimates, not guarantees. Real output moves with tilt, azimuth, shading, soiling and season; a site survey typically shifts these figures by 10-15% either way. Peak-sun-hours data is long-term average, so a good month can beat the table by 20% and a bad one can miss it by 25%.
Usable battery
9.22 kWh
at 90% depth of discharge
Night autonomy at 400 W
23.1 h
excluding air conditioning
Storage per kWp
1.7 kWh/kWp
about 2 kWh/kWp suits daily cycling
How to read the table
The three markets are the ones we ship to most, and the differences are real: Johannesburg gets about 5.5 peak sun hours a year-round, Lagos about 5.0 with a rainy-season dip in June, Manila about 4.5 with a pronounced wet season from June to October. A system sized on the annual average will under-perform in Manila in August and over-perform in March — that is normal, and it is why the battery is sized on the evening load rather than on the daily average.
What it solves
Three load profiles this kit actually gets ordered for. The numbers come from our own commissioning sheets, not from a catalogue.
A shop trading through a four-hour outage
Two 1.2 kW split units, a 300 W display fridge at 50% duty, 200 W of lighting and a 100 W POS draw about 2.9 kW. The battery alone covers that for roughly three hours; with the array producing 3-5 kW at midday, the shop rides a four-hour outage without switching anything off. After dark the same bank runs lights, fridge and cameras for 8-10 hours on 300-400 W.
A five-bedroom home with a home office
Evening load of a fridge (150 W), a second fridge in the flatlet (120 W), lights (80 W), two TVs and a workstation (300 W) totals about 650 W — 14 hours of autonomy, so a full night plus a cloudy morning. During the day the 6.05 kWp array also runs a 1.1 kW pool pump for three hours at no battery cost.
A clinic or pharmacy cold chain
Vaccine and insulin fridges cannot tolerate a two-hour gap. At 350 W average for two medical fridges plus 100 W of lighting and 60 W for the records PC, the bank provides 20 hours of cover and the array restores it before the next evening. A dry-contact output on the inverter can drive an audible alarm if the state of charge drops below 30%.
Where this kit is installed
In Nigeria the 6 kW kit is usually ordered with a generator input and a 30-minute charger boost, because NEPA outages and generator hours overlap; in South Africa the same hardware ships with export limiting for prepaid meters that trip on back-feed; in the Philippines we add a wind-rated ballast frame and a corrosion package for coastal salt spray.
Indicative EXW cost
Ex-works Shenzhen, USD, per kit. The inverter is quoted separately because it is the one line that changes with your grid and generator; everything else below is fixed hardware.
| Item | Specification | Indicative range |
|---|---|---|
| 6,050 Wp of PV modules | 11 x 550 W mono half-cell | USD 1,029 - 1,392 |
| Battery, 10.24 kWh | DLXN-F5200, LiFePO4, 51.2 V / 200 Ah | USD 973 - 1,331 |
| Mounting, cabling, combiners, AC board | Rails, clamps, DC/AC cable, SPD, DB | USD 180 - 260 |
| Hybrid inverter | 6 kW / 48 V hybrid inverter, 2 x MPPT, 120 A charger | Quoted separately — specification depends on grid and generator |
| Kit total, EXW, excluding inverter | Panels + battery + balance of system | USD 2,182 - 2,983 |
Indicative EXW only — final installed price is quoted by your local installer after freight, duty, labour and commissioning. Module pricing is based on USD 0.17-0.23/Wp and battery on USD 95-130/kWh at the time of writing; both move with cell and wafer prices, so confirm before you budget.
Upgrade path
Upgrade path: a second F5200 takes the bank to 20.48 kWh for evening air conditioning; four more 550 W modules (15 total, 8.25 kWp) can be added if the inverter is specified at 8 kW from the start. Order the larger inverter now if you expect to add cooling later — it is the only part that is expensive to change.
Hardware in this kit
Every line above maps to a catalogue page with a datasheet:
Frequently asked questions
How much does a 6 kW solar system with a 10 kWh battery cost?
EXW, the hardware lands at USD 1,029-1,392 for 6.05 kWp of modules (USD 0.17-0.23/Wp), USD 973-1,331 for the 10.24 kWh LFP battery (USD 95-130/kWh) and USD 180-260 for mounting, 6 mm2 cabling, combiners and the AC board: roughly USD 2,181-2,983 excluding the inverter, which is quoted separately. That is an indicative EXW range only — the installed price you pay is set by your local installer after freight, duty and labour.
How many kWh does this 6 kW system produce per day?
About 25.0 kWh/day in South Africa (5.5 kWh/m2/day), 22.7 kWh/day in Nigeria (5.0) and 20.4 kWh/day in the Philippines (4.5), all at a 0.75 system efficiency factor. Monthly that is 750, 681 and 612 kWh respectively. A shop consuming 20 kWh/day therefore runs essentially off the array in the dry season and leans on the battery or the grid in a run of overcast days.
Can it run two air conditioners overnight?
No — and no honest 10 kWh kit can. Two 1.2 kW units at 100% output for eight hours is 19.2 kWh against 9.2 kWh usable. Overnight cooling needs 20 kWh or more, which is the 10 kW + 20 kWh kit. What this kit does well is carry the air conditioners on solar during the day and reserve the battery for lights, refrigeration and fans after sunset.
Is the inverter included, and which one should I choose?
The inverter is quoted separately because it is the one component that must match your grid, your generator and your future load. For a shop with a diesel backup we quote a 6 kW/48 V hybrid with generator input and export limiting; for a grid-tied shop without backup we quote a 6 kW grid-tie unit at roughly half the cost. Send us a load list and we will specify it in the quotation.
Ask about this configuration
Send us your load list, the port you ship to and whether a generator stays on site. We reply with a configuration, a drawing and an EXW quotation — usually within one business day.
- ✉ dlxn@dlxnsolar.com
- Contact details and offices
- Factory: Shenzhen, China · Ports: Shenzhen / Ningbo / Shanghai
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