Honest battery payback

Backtest against real 2023-24 EPEX + load data, side-by-side with the cracked thuisbatterijgids.nl formula. Inputs left, results right.

Best honest payback

Zendure SolarFlow 800 Plus

Annual savings (year-1)
€162/yr
Payback
2.9 years
Battery
1.92 kWh / 0.8 kW · €479
Store quote
€95/yr (4.8 yr) — overstates by 0.59×

Full leaderboard (47 batteries · 0.0s · capturable surplus (= grid exports without a battery): 2371 kWh/yr)

# Battery kWh kW € LP €/yr LP yr 10-yr net cycles kWh capt % capt % full % sat
1 Zendure SolarFlow 800 Plus 1.92 0.8 €479 €162 2.9 €1373 374 607 26% 65% 16%
2 Marstek Venus B 2.00 1.5 €499 €168 2.9 €1430 375 633 27% 71% 2%
3 Voltdeer SR5000 5.12 2.4 €1199 €327 3.5 €2552 296 1193 50% 53% 1%
4 Jackery HomePower 2000 Ultra 2.05 1.5 €669 €172 3.7 €1303 374 646 27% 70% 2%
5 Marstek Venus A 2.12 1.2 €699 €177 3.8 €1334 372 666 28% 68% 6%
6 Growatt NEXA 2000 2.05 0.8 €675 €171 3.8 €1290 373 643 27% 64% 17%
7 Marstek Venus E Gen 2.0 5.12 2.5 €1339 €327 3.9 €2413 296 1193 50% 53% 1%
8 Duravolt Thuisbatterij 5.12 2.5 €1400 €327 4.1 €2352 296 1193 50% 53% 1%
9 Zendure SolarFlow 1600 AC+ 1.92 1.4 €729 €162 4.3 €1129 376 610 26% 71% 2%
10 Sunpura S2400 2.40 2.4 €899 €198 4.3 €1370 369 738 31% 68% 0%
11 Growatt AURA 5000 5.02 2.5 €1499 €324 4.4 €2218 298 1183 50% 54% 1%
12 Ecoflow Stream AC 1.92 0.8 €749 €162 4.4 €1103 374 607 26% 65% 16%
13 AEG Solarcube 4.80 2.4 €1499 €317 4.5 €2133 304 1158 49% 54% 1%
14 Indevolt PowerFlex 2000 2.00 2.4 €799 €168 4.5 €1130 372 633 27% 72% 0%
15 Lunergy Hub 2400 AC 5.22 2.4 €1599 €330 4.6 €2187 294 1204 51% 53% 1%
16 Jackery Solarvault 3 Pro max AC + BP2500 5.04 2.5 €1578 €325 4.6 €2145 298 1185 50% 54% 1%
17 Zendure SolarFlow 800 Pro 2 1.92 1.0 €789 €162 4.6 €1066 376 609 26% 68% 10%
18 Zendure SolarFlow 2400 AC+ 2.40 2.4 €969 €198 4.6 €1300 369 738 31% 68% 0%
19 AccuMate BM2400 2.40 0.8 €965 €196 4.7 €1281 362 731 31% 58% 22%
20 Hoymiles MS-A2 2.24 0.8 €949 €185 4.8 €1173 367 693 29% 61% 19%
21 Indevolt SolidFlex 2000 1.79 2.4 €799 €152 5.0 €944 376 573 24% 74% 0%
22 Marstek Venus C 2.56 2.5 €1099 €208 5.0 €1290 365 775 33% 67% 0%
23 Zendure SolarFlow 3000 Mix AC+ 8.00 3.0 €2059 €387 5.0 €2382 249 1395 59% 44% 1%
24 Marstek Venus E 3.0 5.12 2.5 €1799 €327 5.2 €1953 296 1193 50% 53% 1%
25 Ecoflow Stream AC Pro 1.92 1.2 €899 €162 5.2 €958 376 610 26% 71% 5%
26 HomeWizard Plug-In Battery 2.70 0.8 €1195 €214 5.2 €1261 354 798 34% 55% 25%
27 Jackery SolarVault 3 Pro 2.52 1.2 €1149 €205 5.2 €1206 366 765 32% 64% 9%
28 NextEnergy thuisbatterij 2.10 0.8 €999 €175 5.3 €1010 372 657 28% 63% 18%
29 Indevolt BK1600 1.64 1.2 €799 €140 5.4 €802 382 528 22% 74% 3%
30 Zendure SolarFlow 800 Pro 1.92 0.8 €969 €162 5.6 €883 374 607 26% 65% 16%
31 Zendure Hyper 2000 1.92 1.0 €978 €162 5.6 €877 376 609 26% 68% 10%
32 Zendure SolarFlow 2400 Pro 2.40 2.4 €1209 €198 5.7 €1060 369 738 31% 68% 0%
33 Jackery SolarVault 3 Pro Max AC 2.52 2.5 €1269 €206 5.7 €1091 366 766 32% 67% 0%
34 Lunergy X2400 AC 2.56 2.4 €1299 €208 5.8 €1089 365 775 33% 67% 0%
35 Zendure SolarFlow 4000 Mix AC+ 8.00 4.0 €2419 €388 5.8 €2030 248 1395 59% 44% 1%
36 Zendure SolarFlow 2400 AC 2.88 2.4 €1448 €228 5.9 €1163 355 844 36% 65% 0%
37 Anker Solix Solarbank 2 E1600 AC 1.60 1.2 €899 €137 6.1 €669 383 518 22% 74% 3%
38 Anker SOLIX Solarbank Max AC 7.00 3.5 €2499 €373 6.2 €1773 264 1345 57% 47% 1%
39 Jackery SolarVault 3 Pro Max 2.52 2.5 €1389 €206 6.2 €971 366 766 32% 67% 0%
40 EcoFlow Stream Ultra 1.92 1.2 €1099 €162 6.3 €758 376 610 26% 71% 5%
41 ZinVolt Base 4.00 0.8 €1899 €274 6.4 €1242 317 1026 43% 42% 36%
42 Anker SOLIX Solarbank 3 E2700 Pro 2.69 1.2 €1499 €216 6.4 €975 360 802 34% 63% 10%
43 Zendure SolarFlow 4000 Mix Pro 8.00 4.0 €2899 €388 6.8 €1550 248 1395 59% 44% 1%
44 EcoFlow Stream Ultra X 3.00 1.2 €1799 €234 7.0 €883 351 868 37% 60% 12%
45 HYXI Halo 2.40 3.0 €1699 €198 7.8 €569 368 738 31% 68% 0%
46 Marstek Venus D 2.56 2.2 €1899 €208 8.2 €489 365 775 33% 66% 0%
47 Zinvolt 1.00 2.0 €1296 €86 12.6 €-305 390 336 14% 82% 0%
LP €/yr
Honest year-1 savings from our linear-program oracle (perfect 24h foresight).
LP yr
Years until cumulative savings (with the chosen inflation rate) recoup the battery cost.
10-yr net
Total profit over 10 years: cumulative savings (compounded by inflation) minus the battery cost. Red = doesn't break even within 10 yr.
cycles
Total discharge throughput per year, divided by capacity. Includes both surplus capture and grid arbitrage (charging during cheap hours from the grid even when no surplus is exporting). Useful as a "how busy is the battery" metric.
kWh capt
kWh of capturable surplus (i.e. of grid exports that would happen without a battery) that this battery absorbs.
% capt
That, as a percentage of the scenario's capturable surplus shown in the heading. Note: the denominator is exports, not gross PV — solar that's directly self-consumed during sunny hours never crosses the meter and is invisible to a battery.
% full
Of all surplus hours, the % when the battery was already full and couldn't store more — capacity-bottlenecked.
% sat
Of all surplus hours, the % when charging was pegged at max kW and couldn't keep up — power-bottlenecked.