# Saylor Innovations Battery Backup Calculator

> Saylor Innovations Battery Backup Calculator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Calculates battery capacity, inverter size, amp-hours, runtime, and solar recharge requirements for a given list of electrical loads

## Facts

- Endpoint: GET https://saylorinnovations.com/api/energy/battery-backup?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-battery-backup-calculator-62afc23a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hD58vMK-gjceg7rXzVhFu

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-battery-backup-calculator-62afc23a
```

Example prompt: Can you size a battery backup system for my home office? The loads are: Fridge:150:8, Router:12:24, Laptop:60:6, LED lights:40:5 — I want 2 days of autonomy using LiFePO4 batteries on a 24V system with 5 peak sun hours per day.

## When to prefer this

Use this endpoint when you need a fast, structured calculation for sizing a battery backup or off-grid solar system from a list of electrical loads. It handles multiple load types including motor surge loads, multiple battery chemistries, and solar recharge estimation in one call — ideal for agents automating energy planning, off-grid system design, or RV/cabin power audits. Prefer this over generic energy calculators when you need LiFePO4/AGM chemistry-aware sizing with autonomy-day and sun-hour inputs in a single API call.

## Known failure modes

- Missing required 'loads' parameter returns an error
- Malformed loads string (wrong delimiter or missing fields) may cause a parse error
- More than 30 loads specified exceeds the stated maximum
- Invalid battery chemistry value outside accepted options (lifepo4, lithium_ion, agm, flooded)
- Invalid system_voltage value outside 12/24/48 returns an error
- Extremely high surge wattage combinations may produce warnings or edge-case results

## How this service works

Battery capacity, inverter size, amp-hours, runtime and solar recharge for a list of loads

## Output

Returns a JSON object with recommended battery capacity in kWh and amp-hours, suggested inverter size in watts, estimated runtime given the loads, and solar panel/recharge requirements based on peak sun hours — all sized to the specified loads, battery chemistry, autonomy days, and system voltage.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "loads"
     ],
     "properties": {
      "loads": {
       "type": "string",
       "description": "required loads as name:watts:hours_per_day separated by | for example Fridge:150:8|Router:12:24|Laptop:60:6|LED lights:40:5 (max 30); add :surge_watts as a fourth field for motor loads (query)"
      },
      "battery": {
       "type": "string",
       "description": "optional lifepo4, lithium_ion, agm, flooded default lifepo4 (query)"
      },
      "sun_hours": {
       "type": "string",
       "description": "optional peak sun hours per day for recharging, default 4 (query)"
      },
      "autonomy_days": {
       "type": "string",
       "description": "optional days of backup, default 1 (query)"
      },
      "system_voltage": {
       "type": "string",
       "description": "optional 12, 24 or 48, default 24 (query)"
      },
      "existing_battery_kwh": {
       "type": "string",
       "description": "optional capacity of a battery you own, for the runtime estimate (query)"
      },
      "inverter_efficiency_percent": {
       "type": "string",
       "description": "optional, default 90 (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-battery-backup-calculator-62afc23a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)